Model Engine Maker

Engines => From Plans => Topic started by: tghs on August 25, 2019, 02:48:37 PM

Title: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 25, 2019, 02:48:37 PM
seeing this all started with the 1900 navy plans, found the navy boat 1900 that had the hull and fittings plans, contacted a full size steam guy who has several on the engines.. he provided engine plans and boiler/ engineering drawings.. 1/6th scale was selected because the Stuart Turner compound launch engine kit could provide the engine cylinder block,, the navy engine was design onto itself framework and bed wise.. I made masters for the needed "navy" parts , molds made,waxes cast, brass castings made,, other brass boat parts made (soldering, milling, turning,) last Jan.. things made a big jump with the arrival of a LMS 3990 mill,,my shop space was moved taking about 2 months time but now I'm back up and working..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on August 25, 2019, 03:26:58 PM
Hello tghs and welcome,

You are setting the bar very high with this navy steam launch.  Very impressive, and excellent workmanship on the brass castings and waxes, Likewise, nice work on the sternpost and rudder.

Looks like you have a good set of lines and drawings for the hull. Do you have the full size launch nearby? You did not say which part of the world you are from or who's navy the launch belonged to.

Mike

PS    Ha ha, I have always wanted some "white oak futtocks" (second to last photo)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 25, 2019, 04:13:19 PM
 I'm located in central North Carolina,, the boat is a US navy steam cutter,, in 1900 the navy printed a plan book to standardize boat building at the shipyards,, everything from 6ft work punts to 40ft steam cutters,, the rare book room at the university where I work has copy,, my full size steamboat contact has 2,, one that is unbound so he could send me flat copies,, (he is pushing me to do this correct) the only known existing example of this type of boat is a 40ftr  for the early version of the battleship New Jersey,, several years back it was restored to it's original fitment.. the restorers have been great about supplying me with any needed info.. this  "beast" has been in the planning for years..  most of the story can be found here..
https://www.rcgroups.com/forums/showthread.php?3018430-US-navy-28ft-steam-cutter
this will be a long term project, it wouldn't have got this far without the great help from others..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 25, 2019, 05:43:17 PM
Excellent work on the parts so far!!!


 :popcorn: :popcorn: :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Chipswitheverything on August 25, 2019, 07:48:20 PM
Thanks for posting the project photos and information, this looks like being a most interesting build with a lot of character and prototype realism.  Admire the work that you have done so far.   Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 25, 2019, 10:16:36 PM
Nothing like a good Futtock first thing in the morning!...   :LittleDevil:

Welcome!    I'm a steamboating kinda guy

Looks like your building a model of a Navy "K"..

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwi9_pPH-J7kAhXBY98KHfNOAgYQjRx6BAgBEAQ&url=http%3A%2F%2Fwww.steamlaunch.com%2Fengines%2FAntiqueEngines.html&psig=AOvVaw0N8DAM6J2P0KYf88HmPnlR&ust=1566854106538152

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 25, 2019, 10:25:39 PM
Do yourself a favor if you haven't already.    Draw a line above the shear parallel to the base line, and mark it as a building board line.    You can then build it upside down which will be much easier to work on and you can pick off the dimension to the board line from the plans when you make up your frames from many  many futtocks!....     8)

.....that's just the boatbuilder in me talking..........

Keep the post pictures coming!    I like it....   Alot!

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 26, 2019, 01:26:26 AM
it will be either a B or G engine,, really doesn't matter the basic engine form was the same for all the models,  just the size changed,, all my hulls get a building board made(if I don't have one of the correct size)  and building a hull "up-side-down" is the best method,, its the only way to keep things true during the planking, more important if your hull has a curved or stepped deck.. your link is well known to me..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Dave Otto on August 26, 2019, 01:40:11 AM
Beautiful work, thanks for sharing!

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 26, 2019, 04:03:00 PM
it will be either a B or G engine,, really doesn't matter the basic engine form was the same for all the models,  just the size changed,, all my hulls get a building board made(if I don't have one of the correct size)  and building a hull "up-side-down" is the best method,, its the only way to keep things true during the planking, more important if your hull has a curved or stepped deck.. your link is well known to me..

There ya go.   Were they multilayered and "cold molded" in real life ( poor choice of terms I suppose) ?   or is that just a modern construction bent?

I assume you have it strip planked and then cold molded....   Nice shape!   It looks very fair! :ThumbsUp: :cheers:

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 26, 2019, 04:05:24 PM
it will be either a B or G engine,, really doesn't matter the basic engine form was the same for all the models,  just the size changed,, all my hulls get a building board made(if I don't have one of the correct size)  and building a hull "up-side-down" is the best method,, its the only way to keep things true during the planking, more important if your hull has a curved or stepped deck.. your link is well known to me..

There ya go.   Were they multilayered and "cold molded" in real life ( poor choice of terms I suppose) ?   or is that just a modern construction bent?

I assume you have it strip planked and then cold molded....   Nice shape!   It looks very fair! :ThumbsUp: :cheers:

Dave

and the reason why I ask, is I know where some of the smaller more enigmatic engines might be....   If you're interested in specific detail....  I know where a K is...and I've only seen 2 ever. 
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 26, 2019, 05:56:51 PM
the pictured hull is a 1/16th scale (4ft) RAF whaleback double diagonal planked (the same method was later used on US PT boats) I've have detail photo's of the engines and many discussions with their owner on what changes will be required in the scaling down process.. the foot print will be close,, the frames will be a bit more robust,, the entire block/valves unit will be a little longer,, just a tad taller.. all in all it should be good scale live steam model.. planning on building the hull very close to the prototype in regards to methods and materials.. have 3 select eastern white cedar boards that will provide the planks, white oak for the frames and keel,, I may replace the ash with another pale wood as finding ash with a finer (scale) grain pattern has been tough..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 26, 2019, 06:00:25 PM
That's great!   I really look forward to hearing and seeing more!.

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on August 26, 2019, 06:17:57 PM
I'm No boat builder so I may have this totally wrong. I am surprised at the use of ash wood on a boat, I have only used ash wood to build the frames for vintage car bodies, the wood frames were covered with either metal sheet skins or fabric. The ash frames were  used because ash was a light flexible wood, but it tended to wet rot after a few years due to the effect of rain water etc. So you can see my surprise at it being used in a marine environment. Hope you find a suitable replacement.

Mike
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 26, 2019, 07:38:03 PM
the ash was used as trim alternating with cherry,, it more importantly was used in the seating slats that were bent to follow the curve of the stern.. most of my 30ftr files are to large to post but some 40ftr info give you the idea,, all of the "trim" wood would have been kept in a good coat of waxed varnish..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on August 26, 2019, 08:27:36 PM
the ash was used as trim alternating with cherry,, it more importantly was used in the seating slats that were bent to follow the curve of the stern.. most of my 30ftr files are to large to post but some 40ftr info give you the idea,, all of the "trim" wood would have been kept in a good coat of waxed varnish..

The use of ash wood for trim and seating slats seems very sensible. Ash will steam bend easily and provide flexibility for the curved seating slats. It's a trim wood, not structural, and would be relatively easy to replace when necessary.

The last photo looks just like the inside of Boathouse #4 (small craft) at Portsmouth Dockyard here in the UK

Mike
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 26, 2019, 08:36:14 PM
Looks like Alex's boat.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 26, 2019, 09:17:36 PM
I'm No boat builder so I may have this totally wrong. I am surprised at the use of ash wood on a boat, I have only used ash wood to build the frames for vintage car bodies, the wood frames were covered with either metal sheet skins or fabric. The ash frames were  used because ash was a light flexible wood, but it tended to wet rot after a few years due to the effect of rain water etc. So you can see my surprise at it being used in a marine environment. Hope you find a suitable replacement.

Mike
Ash does get used a lot in boats, fine as long as it is kept painted or varnished - it will soak up water very easily if left bare. It is great for bent parts, just soaking in water overnight will make it very flexible (does have to be straight grained to take a tight bend or it will crack along the grain). I've used it myself for ribs in small boats for decades, never had any rot issues.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on August 26, 2019, 10:27:06 PM
Ash does get used a lot in boats, fine as long as it is kept painted or varnished - it will soak up water very easily if left bare.

That's interesting. The ash frames of vintage vehicle bodies are generally left in the bare, un-painted/varnished condition. It's the ends and the joints which usually rot out first.
Sounds like vehicle restorers are missing a trick. However, vintage vehicles have become so valuable that they are rarely left out in the wet any more, so the rot problem no longer exists..

Mike.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 26, 2019, 11:12:59 PM
getting back to the nuts and bolts, hopefully I can get to work on the crankshaft this week as I'm still deciding on how to build the connecting rod bottom ends , either using 2 bolts as per Stuart Turner or the strap with wedges as in the prototype..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 27, 2019, 01:29:30 AM
Very interesting drawing - the piston heads look to be conical shapes rather than flat, do you know why they are that way??
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 27, 2019, 02:57:25 AM
If you're going to run it hard ....I'd probably go the Stuart route, but considering the level of detail that your working to, I think you need to do the strap. ....don't forget the box links...very important.

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 27, 2019, 01:50:49 PM
thinking of taking a good try at the navy type bottom ends (I have spare rod castings on hand) looks like navy idea was for quick in place bearing replacement, knock the wedges out-drop the "strap"- swap out the bearing blocks- "strap" up and wedge.. as it may not look as positive compared to nuts and bolts most likely held well.. and I will have the benefit of loc-tite type products..  been looking at the box type links and thinking that they offer me the "chance" to get a small rotary table for my mill.
  The cone cylinder head, piston and bottom, thinking the navy engineers moved the shaft gland unit "up" into the cylinder,, making for shorter frames and maybe block.. the US Navy at this time was a driving force in developing tech of the day.. one area was in advancing foundry work  (many castings most likely were more complicated than needed) the creation of the navy ordnance dept, so that no guns would be of foreign production..the "harvey" steel armour  process was developed with navy funding..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 27, 2019, 05:03:09 PM
thinking of taking a good try at the navy type bottom ends (I have spare rod castings on hand) looks like navy idea was for quick in place bearing replacement, knock the wedges out-drop the "strap"- swap out the bearing blocks- "strap" up and wedge.. as it may not look as positive compared to nuts and bolts most likely held well.. and I will have the benefit of loc-tite type products..  been looking at the box type links and thinking that they offer me the "chance" to get a small rotary table for my mill.
  The cone cylinder head, piston and bottom, thinking the navy engineers moved the shaft gland unit "up" into the cylinder,, making for shorter frames and maybe block.. the US Navy at this time was a driving force in developing tech of the day.. one area was in advancing foundry work  (many castings most likely were more complicated than needed) the creation of the navy ordnance dept, so that no guns would be of foreign production..the "harvey" steel armour  process was developed with navy funding..

The conical pistons were easier to cast and stronger, and as you said, made the engine a bit shorter and reduced weight and clearance volume.   A conical piston for a given thickness was stronger than a flat piston.   It was also easier to push condensate out of the cylinder with a conical piston than a flat piston.    The bearing straps allowed the engineers to keep their bearings tight without having to take a bearing cap off to remove a shim.    I'm sure keeping the engines silent was a good way to impress a senior officer, and likewise garnering a lot of attention if they knocked.   Reportedly, it was found that engineers were filing the slots in the links to get longer cut-offs, so they changed the links to box links, which beat that problem.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 28, 2019, 09:59:54 PM
did some milling and turning to look at if the the navy strap and wedges will scale down by 6,, looks like the area for the wedge slot has enough material to work, this will cause some redesign from the castings and a soldering operation.. need to order up some brass and bronze but I have a list of other needs for the boat,, lots of other stuff to work on other boat and engine parts..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on August 29, 2019, 01:36:14 AM
I'd cut that from a much larger piece and from the center of that piece to keep it supported.   A few well placed holes to locate the bend radii, and you can machine the whole part complete and ready to slide on.   The square slots are the tough bits I think....I would make the keys first,  Mill the slots, and finish with a file or a die filer....of course if you happen to have a wire edm...well..

The LAST thing would be cutting the strap from the mother material....well   that's how I would do it anyway....

Watching along. :ThumbsUp:

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 01, 2019, 04:10:00 PM
have done some more design work and ordered up some materials,, thinking they will look close to the prototype,, planning a built up crankshaft, loc-tite 603 and pins,, the webs have been machined  and just need drilling-reaming,, thinking that the connecting rod shaft sections (5/16ths shaft) could be centered drilled,, small cross shaft holes added,, the idea being that it would work as oiling points for the bottom ends,,plugs could be added to the shaft ends (one with small oil hole) making the work like reservoirs,, thoughs  ?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 02, 2019, 01:05:22 PM
forgot that I did make a wedge lock system a few years back (just a bit larger) did some drawing on the oil idea, as for navy late 1800's casting, photo shows a modern attempt to replicate the condensate pump.. that's not going to scale, have a simpler type in mind that will look correct from the outside..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on September 02, 2019, 02:33:29 PM
have done some more design work and ordered up some materials,, thinking they will look close to the prototype,, planning a built up crankshaft, loc-tite 603 and pins,, the webs have been machined  and just need drilling-reaming,, thinking that the connecting rod shaft sections (5/16ths shaft) could be centered drilled,, small cross shaft holes added,, the idea being that it would work as oiling points for the bottom ends,,plugs could be added to the shaft ends (one with small oil hole) making the work like reservoirs,, thoughs  ?

I'm looking for an illustration I saw some years ago for the lubrication technique used on the TBD boats with 4 legged triples.    They had this "pie tin" slinger on the side of the crank cheek that oil dripped into near the main, and centrifugal force would bring it out to the big end bearing....If I find it I'll post it....half the problem is remembering where I saw it   :lolb:

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on September 02, 2019, 02:52:43 PM
This is the concept.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 03, 2019, 07:02:38 PM
milled, stacked and loctited the crank web stock,, the mill made quick work of drilling and reaming the shaft bores..
(https://imagizer.imageshack.com/v2/640x480q90/923/DAuMTv.jpg) (https://imageshack.com/i/pnDAuMTvj)
(https://imagizer.imageshack.com/v2/640x480q90/923/jyOH9p.jpg) (https://imageshack.com/i/pnjyOH9pj)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 05, 2019, 12:43:32 AM
made some gauges the set the webs, drilled the con-rods shafts and started to put the crank together,, as the loctite can be unforgiving, will make a qauge for setting the web when they get placed at 90 degrees..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 05, 2019, 01:01:39 PM
1/2" space gauge made,, crank loctited up,, it will get pinned and finished next week..
(https://imagizer.imageshack.com/v2/640x480q90/922/NT6h41.jpg) (https://imageshack.com/i/pmNT6h41j)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 11, 2019, 01:45:33 AM
looks more like a crankshaft,, mounted the main bearing tops,, clearances for the crank has been milled,, lots of chips on the mill today
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 12, 2019, 04:28:14 PM
drilled and reamed the base,, fitted the crankshaft,, lots of clean-up work on the base to be done along with some dremel machining..
(https://imagizer.imageshack.com/v2/640x480q90/924/4lD6PW.jpg) (https://imageshack.com/i/po4lD6PWj)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on September 12, 2019, 09:54:54 PM
Important waypoint crossed - especially if it rotates freely  :cheers:

I'm sure that I'm not the only one following, even though you do not get many comments. So let me just say that I enjoy following your journey on this project  :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on September 12, 2019, 10:07:31 PM
 :popcorn:
 Yep, looking good!

 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 13, 2019, 12:49:53 AM
the shaft bearings worked in fairly quick,, the bearing side vs the crank webs were tight fits.. lots of careful file work and several grades of fine lapping compound  has the crank feeling very nice..  I have more castings if I mess one up but quite some time was put in the base..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on September 13, 2019, 01:30:14 AM
That is definitely looking the part!   The crank and it's bearings are a major milestone....

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: b.lindsey on September 13, 2019, 01:20:28 PM
Nicely done!!  Still following along here as well, just haven't had the time to comment much lately.

Bill
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 19, 2019, 02:13:50 AM
started working on the navy type con-rods,, the split bearings are bored,, turned the rod sections (finally used my lathe dog that I've had for years)I use the tops of my castings they will get soldered to the rods,, the stirrup straps and small wedges should get interesting..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on September 19, 2019, 02:42:26 AM
Great progress on the conrods, they are a very interesting style. And that looks like a[size=78%]  [/size]Unimat lathe, had one myself years ago.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 19, 2019, 03:08:37 AM
it's been my ship modeling friend,, somewhat tricked out over the years,, extended rails-raising blocks- up-dated VS motor (very big improvement) I modded the milling post with a screw drive adjuster,, just ebayed the jig saw unit, going to make precision filer out of it..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: b.lindsey on September 19, 2019, 11:02:15 PM
Great looking little lathe. My dad had one of those too, but when he was downsizing I passed on it since I had a unimat 3, which I still have. Probably should have kept it but that's water under the bridge now.

Bill
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 20, 2019, 01:32:59 PM
the LMS shop mill is working great, so glad I added the DRO's,, milled the set of bottom-end bearing halves , a little hand filing has them fitting to the rods nicely.. feeling much better about this method..
https://imagizer.imageshack.com/v2/640x480q90/924/ORmxfe.jpg
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 21, 2019, 11:45:14 AM
cut and milled the stock for the bearing straps,milled the wedge slots in one and managed to break my only good 1/16th end mill :Mad:, have a 5 pack of new ones on order..  will work on few other parts for a few days while waiting,, then its a week of vacation,, Oct. will be a slow month in the shop,, weekend of the 12th is the 1/96th fleet gathering in Rocky Mount NC, around 100 RC model warships,, to add to this Halloween gets a little overdone at the house,, we've been told by the neighborhood that we are required to keep doing it!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 05, 2019, 12:51:02 PM
milled the steel stock for the bearing straps also milled up a former to bend them over.. gave the straps a quick annealing and the former  received a quick hardening.. center pin to keep things in place during the bending.. test fitting after the bending and trimmed to size,, the wedge slots will need some needle file finishing work, the straps will get a quick hardening once the are all finished..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on October 05, 2019, 12:58:26 PM
Some nice intricate parts there. well done. :ThumbsUp: :ThumbsUp:

What do you use for the red marking out? Is it a Sharpie pen or similar?

Mike
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 05, 2019, 01:32:42 PM
dykem red layout dye.. added it to a tool order, was hoping it would show better lines on the brass and bronze, still haven't decided on that but I have a bottle to use up..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 15, 2019, 09:44:07 PM
had to make an emergency 2 week trip (things are ok) got back into the shop a bit the last few days,, connecting rods are completed,, along with the cross-head slippers,, some 1/8 inch spacers on the frame feet along with  some material removal corrected some connecting rod/frame interference.. so next week the base and frames should all get bolted together.. as the block and it parts will be closer to the ST plans maybe things will move ahead at a better pace.. without a camera today otherwise there would be pics..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 19, 2019, 12:58:00 AM
had the bottom end all setting together,, setting a weight on top of the frames everything turned and went up and down nicely, working on getting the frame feet a bit more level so nothing will bind when it all gets bolted together..the con rod pivot pin will get drilled for the threaded piston rods along with a machined flat for a lock nut..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 19, 2019, 01:55:24 PM
applied some JB weld to the feet bottoms as leveling/bedding compound,, clamped the frames in the building jig and wet sanded the compound down on a known flat surface,, this gentley corrected any problems, all feet were showing a little brass in spots when finished,, adding the frame crossrods and setting the unit on the base everything turns nicely with just the block weight holding things in place.. time to mark,drill and bolt this together..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 19, 2019, 05:41:38 PM
Neat trick. I like the masking-tape 'formwork' for the epoxy.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 20, 2019, 12:55:06 AM
got a bolt in each foot and after a little tweaking and turning the crank and rods are working easy and smooth,, so the next no turning back step is to remove the tabs on the block that would have been used in the ST mounting.. maybe this madness will work.. on another good note I have what should be a very nice steam pitched prop on the way..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 20, 2019, 05:43:23 PM
looking a little closer to prototype all the time,, getting close to marking all the parts and taking things apart for final finishing..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 22, 2019, 06:51:52 PM
turned a few more castings into parts,,stock ST castings for the lowers,, brass castings for the tops,, getting close to mounting the block to the frames,, thought I would have to add a spacer for clearance with the packing glands but adding the 1/8th inch to the feet looks to have resolved things..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 25, 2019, 09:39:18 PM
trimmed the cylinder covers to fit,, milled the lower covers clamped to the block to get a flat surface to mount to the frame tops,, have to make a drilling jig to get the mounting holes correctly placed,, did a little test with some 5/32 rod (piston rod) things should mount up well..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 26, 2019, 01:48:44 AM
Coming together great, very well done.   :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 27, 2019, 08:52:50 PM
the block has had the mounting tabs removed,, worked on the steam chest,, the steam pipe between the HP and LP mounts high on the LP chest to the point that an extended tab is used for the upper bolt on the flange,, there is also a lip on the upper edge at the cover,, decided to do these details,, milled the LP chest for two 1/8" brass pieces, with room to mill things flat after soldering.. things silver soldered up well and were milled to shape,, (note the "clips" for soldering are titanium strips, bend to the shape you need and they hold things in place,, Rio grande jewelry sells them)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 30, 2019, 04:26:47 PM
carefully looked at the steam ports on the block and milled another 1/32 off each end, looked at the way-bar/valve rod bracket castings and decided that the valve chest could also be thinned by 1/16th still leaving enough room for the 4 mounting bolts,,so the entire unit was shortened by 3/16ths ,, the length of Stuart Turner engine was the furthest out of scale dimension on this project,, the navy block casting was very compact in length, most likely complex to cast in full size..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 03, 2019, 05:59:26 PM
the prop casting arrived today,, it was cast using a very old model steam pitch prop as the master,, after some rough clean-up I'll have to get the center drilled..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 05, 2019, 01:03:52 PM
worked on cleaning up the prop casting, planning to drill 1/8th for each end and hopefully meet in the middle,, as the final bore will the a taper for a 5/16th shaft should be plenty of room to make any needed corrections,, started working on the frame to block drilling jig,, had to wait for a better drill chuck to arrive,, the one that came with the mill was about worth the "included" price.. also a 4" rotary table with 4 jaw chuck will be arriving today,, it should help with holding the prop to start with..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on December 05, 2019, 07:34:33 PM
While the new rotary table + four jaw are some very nice additions to your toolbox (enjoy  :cheers: ) - I'm not sure how easy it will be to actually "fix" the prop in the four-jaw in a stable fashion that will allow you to mill / drill it without mishaps ...  :thinking:

Will follow your progress and best wishes

Per
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 05, 2019, 08:01:19 PM
props are not easy to clamp in any fixture,, I did a little test a few minutes ago and it seems like things fitted well in the 4-jaw on the six inch atlas,, clamping to the prop hub (still thinking some extra hose clamps or the like to make sure the blades stay tight to the chuck face) another option would be to epoxy/bondo the prop into a metal ring as a clamping surface,,not rushing into this, most likely will plan out and make the shaft taper,, do a practice run or too with some brass stock until I feel ready to tackle the prop bore.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 05, 2019, 08:06:15 PM
props are notoriously hard to chuck up for drilling the hubs, always need some sort of custom fixture. One possibility is to make a set of wedge shapes mounted on a backer ring, to clamp the blades against.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: mklotz on December 05, 2019, 09:05:46 PM
Cast the prop into a cylindrical pit filled with liquid Cerrobend (Wood's metal) or similar and chuck the resulting cylindrical slug cum prop in the 4jaw, center on a previously marked center point and drill for prop shaft.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 05, 2019, 11:08:10 PM
I do have some cerrobend, but would need a larger amount.. the nose casting has a well defined ring/center  using a brass tube and a transfer punch I made a precise punch mark,, on the back side the lines of the blade edges were connected and the intersection was punched,, put the prop on center points on the lathe and it looks fairly close,, the back center may need adjustment,, the casting blades are longer and wider so their reduction will help get things correct..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 06, 2019, 01:41:26 PM
turning and marking the prop on the centers and then adjusting the rear punch spot,, the prop being a casting of a casting is about dialed in as it will get.. marked the blades for correct diameter and for any high spots on the front and rear edges,, on both sides three blades are about perfect with one blade needing just little file work.. everything should chuck up well after.. all in all I'm really happy with the casting otherwise I would have been doing a thread on making a prop!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 10, 2019, 09:42:11 PM
chucking the prop was proving problematic,, set a plate with a center hole on the mill and drilled the prop half way from each side with a 1/8" bit,, the leveling in the lathe centers must of paid off because the holes lined up nearly perfect (less than 1/64th off) some work with 5/32nd hand reamers and the bore looks good,, put the prop back in the lathe centers and it very close to where it was with the center punches..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 11, 2019, 09:28:14 PM
drilled the block to frame holes today,, drilled the pilot holes in the jig, turned some alignment pins and cylinder bore guides,, set it all together and drilled spot markers, removed the jig plate and finished the holes,, had put the center stud and nut earlier to keep things in place,, mounted the jig plate on the frame jig and drilled those holes,, now its a bunch of tapping, filing and reaming to get the parts together..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 12, 2019, 01:39:12 PM
my little semi-homemade tapping tool worked great for tapping the block holes,, reamed the covers and frame,, still have to adjust the HP frame castings a bit, things are tight there.. but it all fits together,, the block will bolt to the frames,, the frames need to have the extra material removed to match the blocks lines,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 20, 2019, 01:28:35 PM
my valve shaft guide/way bar castings proved problematic,, after wasting some time trying to get them workable decided to start from stock,, one soldering  run for the valve shaft boss,, one more will be required for attaching the mounting feet,, the hole for the way bar still need to be drilled,, but it will be more like the prototype as the bar can be removed by the bolts,, lots of small work, but my new glasses are ready to be picked up!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 20, 2019, 10:49:06 PM
did a little more work,, the  guides are looking the part a bit more
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 02, 2020, 09:20:28 PM
the rod guides should give enough support to do away with rods exiting the valve chest tops,, except the steam line enters the engine through the top of the high pressure chest,, it has a robust fitting/flange as directly above will regulator.. decided to see if both things could work,, plus I got to use my Xmas to me rotary table,, might have been easier to try something larger but it all worked well,, the HP chest has a rod guide hole and holes for steam..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 03, 2020, 07:21:02 PM
drilled and milled the valve guide bases to fit the steam chest,, gave them a quick blast to clean them up,, a quick positioning test shows the three shaft paths in good alignment,, time to start drilling and tapping (lots of drilling and tapping)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on January 03, 2020, 09:11:42 PM
Looks really good so far  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 03, 2020, 09:29:28 PM
Great parts, really like those valve rod guides.   :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on January 03, 2020, 11:03:16 PM
 :ThumbsUp:
 Coming along nicely!

 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 04, 2020, 12:13:21 AM
thanks all,the guides are a compromise between the prototype , what will work and what would scale..the navy guides are much more elegant and compact,,hopefully most of the making things up stage is behind me,, but it's always something just today noticed I need a 5/32-40 tap and die, might as well order more tools along with them..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 10, 2020, 03:25:08 PM
slow progress as lots of other things going on,, but starting to look more like an engine,, what would be a good choice for gasket material?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 10, 2020, 03:29:35 PM
I like the automotive type fiber gasket material, available in several thicknesses. It holds up well to handling, cuts easy, and does not bleed sideways through the material. Some have had great luck with brown paper bag material, but I never have - the bags I have tried all are too porous and bleed out the edges. Must depend on what your local store uses. You can also use the RTV gasket goops, but those are not good for disassembly/reassembly as much.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 11, 2020, 04:18:59 PM
the last big holes in the block,, due to my shortening the block as much possible (trying to keep a scale look to the engine) the port on the low pressure exhaust had to milled at a slight angle,, slowly getting all the holes in the block, down to about 20 to go. I'll be very happy when all the studs can installed and stay..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 14, 2020, 07:52:30 PM
the rotary table centered, marked a center point on the stock and using the chuck jaws aligned it to a point in the mill collet , mill drilled the center,, milled off the rest, cut the part off the stock a little long,, final thickness on the lathe..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on January 14, 2020, 10:21:24 PM
Interesting - I have never seen oval stock before  :thinking:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 14, 2020, 10:35:43 PM
Yeah, me either, I have gotten half-round and half-oval stock for use on the boats, but never seen that shape. Where did you get it?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 14, 2020, 11:18:23 PM
the stock is what Stuart Turner is sending with the kit in place of castings for the flanges and shaft glands,, without the 4jaw chuck on the rotary table the parts would have taken a bunch of steps,, I made a second one in less than 15 minutes..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 15, 2020, 03:12:01 AM
I searched around and couldn't locate the oval solid bar as such,, Stuart Turner has 2" sections listed as brass extrusion in the spare kit parts listings, only 7 pounds per plus shipping,, 3 sections came with the kit, I should use only about half on the engine,, but lots of other boat machinery to make..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on January 15, 2020, 11:41:50 AM
So basicly Stuart Turner has them custom made to make it easier for their customers to make flanges  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 15, 2020, 02:08:12 PM
I did find some commercial metal suppliers that had it listed, but only at the kind of places you have to buy in bulk.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 17, 2020, 08:51:46 PM
milling and drilling for the glands finished,, purchased some cylinder cocks,, they will get a little work before they get installed,, I'll be making the receiver pipe to navy plans, mounted at an angle due to the port high on the low pressure chest, and fitted tight to the engine side.. will decide where to mount the cylinder cocks depending on the pipe..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 17, 2020, 09:03:13 PM
Really looking great!   :popcorn: :popcorn: :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 17, 2020, 09:31:39 PM
just pistons,piston rods, valve gear, links and eccentrics,, there is light at the end of the tunnel,, most likely an on coming locomotive (I'll take pictures of the smokebox door)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: 10KPete on January 18, 2020, 02:23:37 AM
 :ROFL: :ROFL:

 :cheers:

Pete
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 26, 2020, 06:53:21 PM
turned a fixture to help bend 1/4" copper tubing for the exchange pipe,, lots of learning here today, lots of annealing,, getting good bends in the correct spots proved to challenging,, thankfully you can recover cerrobend and use it again,, after filing things to fit all was silver soldered together and it still fit afterwards.. no where near as tight to the engine as the prototype but not to bad..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 27, 2020, 03:50:42 PM
ordered up some more ME taps and dies this morning along with some others stuff to flesh out the order,, will end up with a good selection by the time I've completed this engine..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 29, 2020, 05:20:22 PM
the stuart block casting was made for an oval exhaust flange, the navy engine has a triangular flange,, a mating flange is the connection to the large pipe leading down to the keel condenser.. I think I came up with some parts that will look correct and work as well, plus I got some more rotary table practice before starting things like the box links..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 05, 2020, 11:13:24 PM
frame tops were trimmed to the engine block profiles, valve shaft guides have been bolted up to the valve chest, cylinder tops and block have been drilled and tapping started, the lower covers still need a few more holes drilled,, still looking at the cylinder cocks and wondering if a fitting with a threaded hollow bolt might make a more compact unit,, the cocks I have could always get used on the boiler..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: zeeprogrammer on February 06, 2020, 12:30:57 AM
Coming together well!

I may have missed it earlier...is this intended for that lovely ship?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 06, 2020, 12:48:48 AM
that's the USS Raleigh 1/96th scale, she did have a 30ft steam cutter as part of her small boat compliment, these boats had ID numbers stamped  into the brass cutwater on the bow,, many searches, emails and museum quires have not been able to get any numbers. USS Raleigh underway with a friends exceptional USS Maine..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 06, 2020, 08:34:12 PM
lots of drilling and tapping,, cylinder covers top and bottom all taken care of, the top studs are close to the navy bolt pattern,, the center stud and nut on the low pressure cover is in the cover for scale looks,, a full stud would have been into the steam passage,, I've used up all the studs that came with kit,, but do have some 7BA threaded rod on hand,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on February 06, 2020, 09:48:33 PM
Looks like you're making good progress and the result looks great too  :cheers:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 11, 2020, 09:47:03 PM
slow but steady progress,, all the glands and guides reamed,, milled the valve castings,, made up the retaining blocks and threaed up the rods,, pistons next, the castings have been cleaned up are turned close to size,, (I tried to import some shop elves for help,, but they either ran off or were victims to groat,, he's the saber toothed mutant dust bunny that has moved with my shops many times,, most often he eats those small needed parts that hit the floor... working more with metal over the years it is my belief that shavings and chips have been carried off,, most likely he now has some form of chainmail armour)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on February 11, 2020, 10:12:36 PM
Engine looking terrific!  Stay safe from that bunny though, sounds really nasty! Was he the one in Monty Python and the Holy Grail?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 12, 2020, 03:24:34 PM
was test fitting the rings in the bores this morning,, low pressure cylinder looked great,, first ring in the high pressure great, second ring was over-sized and looks rough and cragy on the inside,, it fell apart while trying to sand the end gap,,  :facepalm: sent a photo to stuart,, most likely will let groat feast on the remains,, maybe it will stop him from grabbing a needed part for a while..  groat most likely saw the killer rabbit back in the early 80's when he was just a small fluff of a dust bunny..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on February 12, 2020, 03:28:57 PM
(https://www.ekony.com/wp-content/uploads/2019/07/450dustbunny.jpg)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 12, 2020, 04:53:31 PM
maybe in his younger days,, at this point I'm thinking along the lines of wolverine crossed with a horseshoe crab,, add larger fangs and less friendly temperament.. I think he got into the house once and had a confrontation with one of the cats,, lately he has had a taste for 7BA nuts,, "imported treats?"
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: ddmckee54 on February 12, 2020, 07:20:45 PM
The killer rabbit, was that Bun-Bun?  Or am I in the wrong decade?  After a while they kind of blur together.

Don
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 13, 2020, 10:31:22 AM
received a nice email from Stuart Turner, they are standing by their product and sending new rings...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 14, 2020, 06:14:44 PM
turned and threaded the top end for the piston rods, will use them as arbors to finish the pistons,, will be away from the shop with other things for a few days,, waiting on new rings,, will be drawing out the links a little better,, knowing that the block will get brass side cover sheets, what would be good choices for insulation to take up the space?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: derekwarner on February 15, 2020, 03:01:31 AM
Have watched on with this thread  :happyreader: from day one.......with great interest

The cylinder head has a sizeable volume of heat contact area that [heat] can be partially saved/contained, hence helping to maintain the desired working temperature within the cylinder block, and not continually lost to atmosphere

By example, my steam discharge valve on the boiler top approaches 206 degrees C when the boiler relief valve is set @ 2.5 Bar.......

I have insulated the boiler steam discharge 1/8" [3.17 mm] OD tube with a wound cotton twine, covered with a Celulose domestic filler, sanded & painted with domestic primer & gloss enamel. The outer diameter of the insulated tube is ~~10mm OD

The temperature of the outer insulated tube surface 25mm away from the valve nut is ~~95 degrees ...or an 11 degree variation in temperature that is then being exposed to atmosphere

I have reported in earlier threads that this insulation provides steam to the engine some 220 mm line length at ~~ 4 degrees C hotter than with an uninsulated tube

You could consider laying pure cotton thread vertically within the voids of the engine block, then filling and sanding off with a domestic celulose filler.....[would take a few fills & sands and can get dusty, however once done is complete]

The final sanding of the cellulose filler will follow the upper & lower profile of the cylinder head  :killcomputer: prior to the final vertical wooden lagging strips

You could use an inexpensive digital pyrometer to confirm surface running temperatures of the engine pre and post the insulation, which displayed the ~~ same temperatures  :Doh:

So this is naturally very difficult to quantify, [as this type of insulation contributes to a lower heat input requirement to maintain a desired temperature]

I used this same engine insulation method [as above] with my Saito Y2DR 12 x 20 horizontal twin, however used the original Saito brass shim cylinder covers, then wooden slats

Naturally I cannot confirm a unit reduction in gas heat input to maintain the ~~ 2.5 Bar WP, however I believe the gas input reduction must be in hidden in the total heat load equation of my steam plant

[an :old: Scottish Toolmaker trained in London once told me [55 years ago for me as a 1st Year apprentice] that if you removed the cylinder head lagging on certain steam engines, you could find refractory brick chips, with the remains of pages from the London Daily Chronicle  :naughty: mixed together with a [now hardened] lime slurry] 

Derek

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 20, 2020, 11:14:16 PM
started on an attempt to make the navy style links,, using stuart drawings as a guide drew up what might work and started working on the stock that will form the two main halves,, had a brass piece in a stash that was large enough the hole in the center for chucking up was a bonus..lots of milling and I have a ring that the sections can get cut from.....
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 21, 2020, 01:43:46 AM
one last shot for the evening,, all center-punched, it will be easier to do the drilling before cutting them out and apart.. not quite watchmaking but small,,each one will have to a boss soldered on dead center,, have to make 4 drilled spacers and 4 sliders that will fit inside..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on February 21, 2020, 01:46:20 AM
 :ThumbsUp:
 Looking good!

 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 21, 2020, 08:58:34 PM
replacement rings arrived today,, they look much better!!!  drilled and milled the sections and cut them apart,, drilled some 3/16th rod and cut it to length to form the spacers,, worked on just one to start with.. micro belt sanded and filed,, a little hand sanding.. this might work!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 23, 2020, 03:37:57 PM
sun was shining on the big table this morning, laid out some of the navy boat steam engineering plans to review for work ahead,, the mutant footed yeti monster decided he needed to help..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on February 23, 2020, 04:54:02 PM
How many toes DOES that yeti have, anyway? Looks like some spares on there...  The coloring is just like a cat we had when I was a kid - got up to around 25 pounds, liked to chase dogs and mailmen.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 23, 2020, 05:10:53 PM
he's a 26 toed monster 2 toes short of tying the record,, polydactyl's were historically ship cats , ships had mascots, but cats were crew..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 24, 2020, 09:43:26 PM
worked on the second link box,, it looks like the first one (always good when that happens),, started looking at the pivot studs for the drag bars,, made some threaded spacer disc from some 1/4 rod,, I'm thinking some loc-tite during the final assembly and it should be good..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 26, 2020, 01:18:11 PM
started the four drag bars,, drilled out brass rod on the lathe, milled and drilled cross holes, soldered up as one unit, cut the sections apart with a jeweler's saw,, reamed to fit,, still have to clean up the end lengths .. one fuzzy photo,, camera operator needed more coffee this morning..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 26, 2020, 09:37:43 PM
got the four drag bars cleaned up and adjusted close to the final fit..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on February 27, 2020, 11:52:32 AM
Looks like those small parts assembled just nice.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 27, 2020, 01:15:57 PM
thanks, almost watch making,, things will look better with the bolts cut to length,, made measurements for the throw arms that will connect the box links to the way shaft.. then eccentrics, rod and pistons,, light at the end of the tunnel,, (most likely groat has developed some form of bioluminescence or ate some batteries)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 28, 2020, 09:46:20 PM
made the arms from some brass flat and 1/8th brass shaft collars,, will need lots of fine adjustments and a few spacer/washers.. but did a quick test fitting on the low pressure end of the engine..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 05, 2020, 01:44:21 AM
started working on the eccentrics, made an arbor for the lathe and one for the mill.. roughing them out with the mill save lots of time.. two done, two to go..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on March 05, 2020, 02:05:29 AM
Coming along great! Seeing the unimat brings back memories, one like that was my first lathe, did lots of models on it. Looks like you put a different motor on it though.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 05, 2020, 02:17:39 AM
after market variable speed, lots of power,, don't have to change the belts position to often.. plus it doesn't get hot during long runs..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 07, 2020, 01:39:36 PM
four eccentrics ,, bored and trimmed , have to start on the rods,, the castings from the kit will be used, but they will get a little more attention than stuart calls for so they look a bit more like the navy engine.. also have come up with a drain-cock plan for the cylinders that won't look so out of scale..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Craig DeShong on March 09, 2020, 07:57:12 PM
Silently following along.  Looks GREAT  :popcorn: :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 31, 2020, 04:27:26 PM
my building at work went to essential staffing only,,seeing it is a research facility just one person per day to keep things alive,, 3 of us are sharing the work in 3 days stints plus our weekend person,, seeing my shop is located there not alot of work will get done steam engine wise for a while.. might get a little time in the next 2 days, but then I'm scheduled to be out all next week,, unless a chamber has a problem as I'm still required to come in and do repair work..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 02, 2020, 03:14:35 PM
it looks like we are returning to a somewhat normal work situation next week, "normal" being a relative term.. so I might be able to start getting some work done again,,been watching everyone else's work and learning and planning,, the covid garden is starting to produce, picking pea pods today.. a couple tomatoes showing a tint of color besides green..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on June 02, 2020, 03:29:53 PM
Popcorn is ready, shop elves have their mugs of root beer ready too.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 03, 2020, 05:11:36 PM
out of boredom I ordered a 5" x 7" tilting table for the mill.. also ordered up a correctly scaled shop assistant for this project,, a scale crew has always been in the plan for this model,, at one time was thinking along the lines of midnight returning liberty launch with a collection of sailors and marines in various states from the nights activities in the city.. but also have a more sedate 3 man crew on a special sortie planned.. the shop assistant is in the vain of limited impact on the build photos..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 09, 2020, 03:24:02 PM
my 1/6th scale shop assistant has arrived and has been billeted in the shop,, after the last disaster involving elves and groat the floor monster(see hearse project) I have been banned from employing elves due to unsafe working environment.. I think "Slim" will work out fine being the correct scale he has some size to him (12" tall) and really nothing for groat to go after,, if required he will get a top hat, whip and chair to bring things in the shop under control.. at this time he's checking out the engine and some recent "stuck at home" purchases..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on June 09, 2020, 09:13:08 PM
Slim has a great apperance about him  :LittleDevil:  though I wonder how he kept his eyes when all else that isn't bone has gone  :thinking:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 09, 2020, 09:21:00 PM
always wear your safety glasses!!! he just didn't look right without the eyeballs so I added them..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on June 09, 2020, 09:46:10 PM
always wear your safety glasses!!! he just didn't look right without the eyeballs so I added them..
He needs a little pair of safety glasses, and a (dented) hard hat!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on June 09, 2020, 09:48:00 PM
The funny thing is that it makes him "more human" with the eyes (why they also do it in movies and cartoons), but also strange as it is a human (model) skeleton. But I like that you did it  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 10, 2020, 07:13:26 PM
with my shop he might need a full helmet and a fire extinguisher,, thought about the the glasses, but lacking a nose and ears this might be problematic.. shop has been cleaned and organised a bit and might get back to the engine (if I can remember what I was doing next.)time to start messing things up again..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on June 10, 2020, 09:11:58 PM
Quote
with my shop he might need a full helmet and a fire extinguisher

 :lolb:       ..... I do hope that the accidents aren't so bad that you might loose life, limbs or the shop / house.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 24, 2020, 12:35:31 AM
actually got some shop time today.. starting working on the eccentric rods ,, a little casting clean up,, a little marking center lines,, spot faced for drilling the cross bolts,, slim says they need to thinned down like him..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 25, 2020, 11:23:34 PM
the rods were drilled for the bolts, and the cut..instead of working on the 4 rods all at once I decided to get one close to complete (that way I would only mess up one) the boring head in the mill worked great,, back on the unimat to turn down to thickness,, turned the recesses on each face,, lots of size checking,, a little file work an the parts fit well enough to lap them to the final fit,, still has some file work for the final outside edges,, slim is happy that a lot of meat was removed from the casting, he wants everything skeletonised!! the other three should take less time,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on June 25, 2020, 11:33:14 PM
Hmmm, Slim reminds me of the ventriloquist dummy Achmed, only Slim says "I MILL you!"   :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 26, 2020, 08:31:30 PM
I MILL YOU, I MILL YOU TWICE!!!  today we have the four eccentrics and rods,, they still will need some final hand work.. my drag links are to short so new sets will have to made.. (still making this up as I go along) the rods are just held in place at the link with some small screws  to test fit things.. sorta just down to getting the pistons turned and final finishing.(plus to ton of little things)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 30, 2020, 03:09:24 PM
spent some time drilling 3/16th rod for the new drag links,, looked at things a little harder and came to the conclusion the the links are fine and the arms are to short,, have to start looking at making a new set of them.. :facepalm:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on June 30, 2020, 08:36:31 PM
the new drag arms were easier to make than the drag links,, test fit shows it should work now and has reduced the needed travel of the way lever,, slim wants me to make the the lever next so he can get a handle on things..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on June 30, 2020, 08:49:43 PM
Better do what Slim wants, he has a REALLY intense gaze!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 02, 2020, 05:54:36 PM
I worked the pistons anyways, turned on threaded shafts as arbors to keep things centered..still need the bottoms and tops profiled,, holding off on cutting the ring grooves, I scored 10 micro boring/cutters,, $5.50 total they should help do the job well.. (should be in mailbox Friday) next week might be the start of take it all apart, finish and correct things, make the last little bits (oil cups, link sliders, cyl vents, ect ect ect)put it all back together..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 03, 2020, 04:44:36 PM
my 5 dollar and change cutter lot arrived today,, sometimes even a blind squirrel finds a nut!!! they look new and very very nice,, I had a bid up to 30.00 placed and sort of forgot about it, was shocked when the you won email showed up.. they should work well on unimat SL
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: simplyloco on July 03, 2020, 05:24:27 PM
A real bargain. Well done.
John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 06, 2020, 01:13:43 PM
a while back I ebeyed a quick change tool post for the unimat SL100,, for the price its been great and speeds things up..,, the dremel mounting holder is a big plus,, contacted the seller and he set up an 4 extra holder package including 2  "blanks" that I can drill for the new cutters,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 08, 2020, 11:27:47 PM
milled flats on the crosshead pins, drilled and tapped them for the piston rods.. then it was a test assembly to check fit and spacing,, after a bit of filing on the crossheads everything fits and seem to be true.. with the temp rods extending out of the block top my test pistons that were used earlier were slid down the shafts and slipped into the bores nicely.. working the crank all seems to be working well .. on the other hand I think slim has been into the hand sanitizer... pistons need final work, rods need to made along with the spacers for the locking nuts,, but everything will ..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on July 08, 2020, 11:52:34 PM
Wow, you are really working Slim hard, is is out cold!  He, I mean you, are doing fine work!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 09, 2020, 10:14:56 PM
profiled the pistons tops and bottoms to match the cylinder covers,, slid each cylinder assembly together and measured 1" clack to clack travel,, so the the cranks 7/8" throw all is still looking good.. slim is back on the job inspecting the work..(well at least he's off his back)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 15, 2020, 10:06:36 PM
extra tool holders for the QCTP arrived, 1 standard, 2 blank and 1 1/8TH inch for the new little cutters,, perfect fit so it was off to cut the rings lands in the HP piston,, the set-up works great and very precise,, measured for the piston rods, turned and threaded the pair, spacers and locknuts added.. have to finish the ring lands on the LP piston . 
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on July 15, 2020, 10:59:43 PM
Just noticed something in the top of the steam chest that I missed earlier in the thread - around the hole for the valve rod, there are curved slots concentric with it going almost all the way around the hole. What are they for? Does something go through there?   :thinking:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 15, 2020, 11:31:17 PM
the steam supply enters directly though the top of the HP chest,, still need to make the fitting, drill and tap 2 bolt holes,, valve rod can ride in center hole while the slots will let the steam in.. one of those scale verses functional model things..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on July 16, 2020, 12:39:29 AM
Now thats very clever, combines the two flanges. Thanks!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 17, 2020, 08:31:43 PM
my valve rod/way bar frames hold the shaft nicely don't know if the top hole will be needed,, I'll not have in the LP chest,, LP rings all fitted to the piston,, a little ink and patterns for the gaskets are all marked out,,found that my model dockyard micro gouges will cut nice little fuzz free holes,, cork borers for some of the larger holes,, slim doesn't like the ink on the block, I think I'll move the sharp tools out of his reach..some light reading arrived (most likely should have read this years back) also found my shop wisdom book has a great 2 pages on setting and timing the eccentrics in a model compound engine..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on July 17, 2020, 09:04:31 PM
Slim looks pretty upset, best to move those sharps...   What is the wood-handled brass-cone/steel blade thingy on the left side of the picture? Looks like something good to chase door-to-door salesmen with...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 17, 2020, 09:15:58 PM
that is the tool used for sharpening the cork borer tube end, keeps things round and puts the correct bevel edge on the outside of the tube..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 19, 2020, 04:47:56 PM
spent some quiet time this morning making gaskets....
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 22, 2020, 12:48:15 AM
took some of the sharp edges off the crankshaft bearing bases,, still have to clean up the tops and drill them for the oil cups (and make the oil cups) made a shaft fixture with a center so the thrust box supports could be checked for alignment and marked for drilling..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on July 22, 2020, 01:21:33 AM
What are the upturned arms on the base at the left side in the photo for?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 22, 2020, 01:56:34 AM
thrust box mounts,, the US navy used these for some years,, a series of disc mounted on the engine shaft,, the thrust box had matching close fitting slots,, all of this in a lube box,, Idea was any back and forth shaft loads caused by the prop, direction and sea conditions would be taken by the the box and not the engine's bearings,, I did the castings for the box, mine will be for show (except for the lube part) 1st photo is a navy "B" engine that has been the main photographic source of info for my model,, good shot of the disc on the shaft..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 22, 2020, 06:04:31 PM
while thinking about the thrust box mounts and the making this up as I go along,, the mounts needed to marked,center-punched,drilled and tapped.. plus supporting them while doing all this would be a bad idea.. a chunk of aluminum was measured,cut and milled square.. milled a big groove to match the bearing half faces...clamped in place the mounts back face rested on the edge giving nice support.. all punched,drilled and tapped..not a bad lunch hour.. thrust box castings ready to get some work..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 23, 2020, 11:11:47 PM
seeing the mounts were all prepped decided to work on the thrust box,, the casting halfs were filed flat and loctited together,, milled and drilled for the through bolts, drilled for the mounting studs,, fitted a thin brass tube in place of the shaft to use as a drill guide,, drilled the box and then finished up things with the reamers.. the box is mainly for show but will provide some shaft support.. a condensate pump  driven by an eccentric will be outboard of the box..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on July 31, 2020, 08:10:22 PM
spent some time today with the opti-visor on making the cylinder cocks,, wanted to make them as small as possible trying to keep the scale look.. they still need the drain hole drilled but will do that when they get installed so it will be correctly positioned..(I'll make a nice brass spanner to work them) made up the fitting for steam admission on the HP chest top. polished the valve faces of the block and the valves.still have to make the travelers for the box links and the brass side and top panels,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 08, 2020, 05:33:42 PM
a bit more of the the small stuff,, made the valve shafts with some silver soldering.. the link sliders were made by cutting and filing some brass stock(had to mill it to correct thickness first) when the crescent shaped piece fit in the groove of the extra link stock it was drilled (using the stock as a holding fixture) the the separate guides were cut..lot of small drilling and filing, but it feels good and moves smoothly.. may have the grind down the bolt heads of the rod bolts for clearance along with the lock nuts on the back side..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on August 10, 2020, 02:16:33 AM
 :ThumbsUp:
 Looking great!
 :popcorn:
 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 11, 2020, 09:36:46 PM
still working on the final few things,, slim is happy as today he can get a handle on things..waiting on a BA threaded order of nuts, screws and bolts.. going to try to get the engine brass side covers in the next day or so.. thanks all..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 11, 2020, 10:07:10 PM
Looks great, can see why Slim is happy. :popcorn:

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 12, 2020, 09:39:02 PM
slim seems to like shiny objects,, gave him a big one today  work on one of the engine shrouds is being fitted,, lots of fun forming some sheet brass,, made a pattern with a piece of heavy-duty aluminum foil.. still have to make the other side and decide if they will be soldered together at the top center seam..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 12, 2020, 10:34:56 PM
Wow, that really changed the look of the engine. Did you make a wood form, or just bent over the engine? Very clean result.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 12, 2020, 11:06:50 PM
used a few pieces of round and square stock to get the basic side shape,, marked for the top bends and used a bench anvil and stock in a vice to work those into shape,,marked and trimmed for the cylinder tops,,  it really does change the look.. the foil pattern helped greatly..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 13, 2020, 08:11:03 PM
finished the other side shroud and it was soldered to the other,, kind of just set everything in place to get a good look at things,, there are a lot of parts involved here.. will have to get started on a boat frame section for a test stand..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 13, 2020, 08:58:12 PM
Looking fantastic!    :popcorn: :popcorn: :popcorn:




Oh, and don't forget to make Slim  a 'life' jacket, unless you fatten him up on cookies he won't float to well!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 14, 2020, 01:14:10 PM
slim might get upset to find out a more "fleshed out" crew will get this engine once it's in the hull,, Kind of worried I can't tell if he is smiling or scowling,, I do have an idea for another long term 1/6th scale project that he could get command of..scaling it out calls for a 4cyl IC engine 5-6" long, hull would be at 56" long,, I'll tell him a reduced weight driver would be a "good thing".. crew for the cutter is getting inspiration from period photos..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 14, 2020, 04:17:23 PM
You could build him something like this too - I've seen them done with a, um, skin-impaired person, like Slim, as the rower. There is a guy in England that makes the RowBot controller that drives the servos for the oars. I have mine set up for Captain Jack Sparrow. Four servos, two for each oar, takes RC input on two channels so you have Fwd/Rev throttle on one stick, steering on the other, and the RowBot box coordinates the four servos.

(https://i.postimg.cc/j2L6Q6DR/IMG-0641.jpg)

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 14, 2020, 04:54:09 PM
I have photos for most of the navy boat book 1900.. this was the plan book used by the boat yards so putting together a rowing type boat could be fun,, right now I'm looking hard at the idea of having servos inside a 1/6th scale crewman so he will have his hands on the regulator and way lever,, a couple of packets arrived,, a few tools for the mill and lathe, the assortment of BA stuff,, 2 weeks from order to mailbox for this order,, coming from the UK can't complain at all,, looking closely at the stuff I think stuart may be using them also.. all looks great..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: ddmckee54 on August 14, 2020, 05:04:06 PM
You build Slim a copy of the Thousand Island Y.C. One-Design class boat, and the next thing you know he'll want a copy of Gar Wood's triple engine Miss America.  Or maybe a its' rival the Miss England, if Slim's originally from that side of the pond.

Don
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 14, 2020, 05:13:49 PM
I think he'd want a chris-craft cobra or a baby-bootlegger,, better to pick up girls :ROFL:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 15, 2020, 12:39:54 AM
with brass screws in the bearing caps it was time to clean them up.. the set up seemed to work great and with a little file and dremel work it should be ready for final assembly..(after it gets holes for oil cups, and I make the oil cups)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 16, 2020, 03:07:10 PM
I was sorting through some photo files this morning, it's been long slow progress with several delays but the light at the end of tunnel is looking a lot less like the headlamp of a locomotive..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 16, 2020, 04:14:40 PM
Stunning progress. You and Slim have worked your fingers to the bone!  (sorry, had to beat CNR to that one).  Looking great!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on August 17, 2020, 06:25:41 PM
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: The launch engine looks great!

Pretty quick on the draw there with the pun Chris! well done.

Getting down to the bare bones of the pun file for a suitable response, Slim pickins indeed. Must be low-fat cookies for shop elf feeding in the TGHS shop!

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 17, 2020, 08:00:53 PM
I saved slim's boney fingers a bit, filed and dremel sanded the base and frames,, then it and a few others parts spent a few minutes in the blast box,, the fine beads give a scale cast look,, a shaft was left in to protect the bores and the smooth crosshead guides were taped.. now to give it all good cleaning and start putting things together..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 20, 2020, 04:15:11 PM
spent all of my shop time yesterday looking for things I had put in safe places so they wouldn't get lost, first was the packet of small round-head screws for mounting the shroud, second was my envelope of gaskets,,both items have been found this morning, more or less where I thought they were.. it's amazing to loose things in 12ft square room,, thinking of investing in Dr. Scholl's memory insoles but I heard they really don't work..guess this all comes with turning 60 last week..I think slim was laughing at me the entire time..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 20, 2020, 11:55:13 PM
lots of little pesky work today,, drilled the shroud and block, tapped the holes for 1-72 thread,, the little 1-72 screws thread did not go all the way to the head so the required number were all ran up on a die,, they also were a tad long for the needs so a threaded piece of brass was used as file guide to get the length correct,, spent some time cleaning up other parts..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 21, 2020, 06:14:33 PM
keep remembering things that have to get done before it all gets put together,, today was insulating the block.. been thinking of what to use,, but I did have the a sheet of cork on the shelf and the RTV in a tool box,, don't know if it will make a difference in running but a little clean up after the RTV is cured and it's taken care of..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: derekwarner on August 21, 2020, 10:38:48 PM
Naturally you will not be able to do A to B tests, but be assured....once the engine block comes up to running temperature, your captive  insulation will assist with maintaining  :Mad: the engine temperature.....well done  :ThumbsUp:

Derek
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 24, 2020, 11:27:01 PM
started assembly,, cleaning up each part as it's needed,, the order of assembly might be somewhere just short of an Asian puzzle box..so far all is smooth any moving nicely..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 24, 2020, 11:30:49 PM
I probably missed it earlier in the thread - why is there a second hole in the big end of the con rods, above the crank pins?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 24, 2020, 11:42:19 PM
just added those,, don't really know what it's function was for sure,, I figured it is a good port to add a drop of loctite to the wedges,, but it is a feature on the full scale engine
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on August 25, 2020, 12:03:43 AM
Might have been a way to lighten the big end? Nice to see those details in the model.  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: derekwarner on August 25, 2020, 03:12:19 AM
I believe the top [second] hole in each piston rod was for an alignment jig used to set, then accurately machine the actual big end bore

So the first piston rod is secured at the piston end, and secondly secured for the machining of the top hole for the jig pin

This rod is then mounted on the jig pin and the stroke is accurately set relative to a position on the piston end, then the bigend bore is completed

The second piston rod is premelinary machined with the top bore, is then placed in the jig [stroke accuately set] and the bigend bore is completed so ensuring both pisto rod stroke lengths are identical

The original plan does not state this, however the concept is sound

Derek

 
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 25, 2020, 11:34:38 PM
worked the pistons into the cylinders, and bolted the block to the frame,, as expected things were fairly firm and in need of breaking in a bit.. figured I could turn it by hand for few hours or rig something,,a little time, lots of oil,  moving much nicer now..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on August 25, 2020, 11:37:35 PM
Just love the engine mounting wedges.  :ROFL:  And the Unimat SL  :ThumbsUp: :ThumbsUp:

Mike
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 25, 2020, 11:52:36 PM
they locked on the rails great.. sometimes things just workout..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 27, 2020, 12:40:15 AM
questioned two experts on these engines as to the why to hole in the connecting rod.. results are no one knows for sure,, less weight, access to the wedges, central point for machining, easier to machine the wedge mortise. all in the mix but no sure winners.. did get a good start of getting the valves set and everything together....
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 27, 2020, 06:40:10 PM
before things fell over making myself very upset,, today's lunch hour was spent putting together a "functional work stand"
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 28, 2020, 08:13:15 PM
a few more things to take care of, but its all pretty much together.. valves and eccentrics have been set,, linkages seem to be working smoothly.. so sometime next week will put air and steam to it..slim seems to like the look of all the brass..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on August 29, 2020, 01:49:55 PM
my full scale steam guy recommends that the transfer/receiver pipe be a larger diameter for better running under load,, I have some of the oval bar stock left and some 3/8ths tight copper elbows that might work to put together a 3 piece pipe.. will do test fitting to see if the nuts will clear (my last order did include some small pattern 7BA nuts)the photo does show that the pipe was large and made with sectioned elbows. I was planning on a second fitting to run the engine as a standard twin on air while testing..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 02, 2020, 09:22:53 PM
larger pipe made, slim says it's to fat (he says that about many things).. but the other pipe will be in the box if needed,, did have to make a set of spacers so there will be enough room for the pipes insulation
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on September 02, 2020, 10:44:16 PM
It would be interesting to try both pipes with steam, and see how it behaves. Looking great!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 06, 2020, 11:27:08 PM
working on a period looking throttle/regulator valve,, kind of a scant evidence item,, no really good photos,, questionable plans,, have some info that a sliding flange/gate type may have been in use,, something that would very tough to scale down,, giving replacing the slide with a piston a try,, it passed the zero test and held back 60psi.. still need to finish up the linkages and packing nut..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on September 06, 2020, 11:31:06 PM
 :popcorn: :popcorn: :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: steamer on September 07, 2020, 02:12:38 AM
I'm digging that !!!   




Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 11, 2020, 11:39:01 PM
well not counting nuts and bolts , 12 parts went into this throttle,, it's a copy of the push-pull flange type but using a piston in place of the flat plate,, it will hold back air , will have to see how it does with steam,, somehow slim only understands wide open..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 18, 2020, 05:49:37 PM
well work has really gotten in the way for the past week or so. Not much work model wise but the major work project is about completed,, most of it ahead of time!!!(instead of messing with 4" x 8" metal sheets been messing with 4' x 8' metal sheets) did have some free time to order up a few things in the holding dept.. 5C collets blocks and a 15 piece set of collets,, a 3 jaw centering chuck and plate for the rotary table, as its a little smaller it might get most of the use,, the table clamps that the table came with are to narrow to be used on my mill easily,, next quick project will be to make a better set.... slim always likes new toys..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Hugh Currin on September 19, 2020, 12:37:02 AM
Great build, coming along nicely. But I have to admit that I tune in to each episode to see what Slim has to say.

Thanks.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 26, 2020, 01:36:13 PM
very busy non shop week,, the major work project of retrofitting and rehabbing 8 large environmental chambers was completed, lots of inspections and testing. I did manage a little time to make some better clamps for the rotary table, clamps that came with were only barely wider than the table slots,, hogged the steel down with a hacksaw to reduce mill time, milled, drilled, filed and sanded.. after some final cleanup they will get  quench hardened (I'll save some oil when the truck gets a change this weekend) hopefully next week the engine will get tested..

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on September 26, 2020, 08:25:17 PM
Nice design - how did you get the two curved surfaces ?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on September 26, 2020, 08:38:07 PM
the black one that shows the curves, is one of the not wide enough ones that came with the table, I'll have to work on mine a bit more (files and milling) to get them that nice,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 02, 2020, 06:15:40 PM
46QuQjieanY  only running on air, still needs lots of tweaking but it will run,, even in both directions
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 02, 2020, 07:49:56 PM
slim was upset that he wasn't in the video, but it was last minute thing, also the first vid I ever posted,, engine is still tight but starting to break in, hopefully it will get to see some steam in a week or so,, to make slim happy I gave him the weekend off( thinking I should valve off the air from outside the shop)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 02, 2020, 09:57:09 PM
Excellent!!!  :ThumbsUp: :ThumbsUp: :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 05, 2020, 06:35:32 PM
officially a monday.. early this morning noticed a slight wobble of the chuck I'm using as a temp flywheel.. further investigation found that one of the loctite and pinned joints at the connecting rod has failed.. I do have new stock on hand, I did save the spacing jigs that were made.. now the real question is should crank #2 be loctited or silver soldered? slim has taken the attitude that all of this happened before he entered the shop, I still think he tried to find out what was max rpm over the weekend!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 07, 2020, 08:29:32 PM
slim taking charge of the new crankshaft,, just a quick test fit of all the parts,, loctited the webs together for milling, drilling and reaming.. the webs do have chamfered holes on the non-bearing sides to allow the solder to fill the space better,, the outer pieces are just for support and balance while soldering..all the pieces will need a final clean-up and prep,, will have a friend help with the soldering as most likely will use two torches so things heat evenly..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 10, 2020, 10:24:11 PM
well the first attempt at a soldered crank was a bust,, solder didn't want to flow,things got over-heated, three of the eight joints were fine the rest weren't!! new stock is on the way along with new flux (both white and black) black is supposed to work better for ferrous work.. experience is what you get when things don't work..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 10, 2020, 10:29:21 PM
The black flux is also supposed to last longer under heating, I like it a lot. Be sure to leave room in the joints for the solder to flow in, if the joints are tight the solder will just sit on the outside.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 10, 2020, 10:33:48 PM
my container of white was 20 years old, had been rewetted several times.. it was time to replace..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Craig DeShong on October 11, 2020, 11:18:21 PM
... I still think he tried to find out what was max rpm over the weekend!!!

Itís obvious to me that your problems are due to Slims overexcitement... just like a kid.

Iíve only silver soldered one crankshaft... it came out great but I attribute it all to Ďbeginners luckí I could never repeat it.  Now my eyes are so bad I canít see what Iím soldering so any future soldering attempts for me is strictly out.

Looks like youíre on the right track and youíre getting excellent suggestions.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 13, 2020, 08:05:50 PM
well my flux order arrived today,, not what you want to see when you open a box with a smile on it.. no packing two containers rolling about!!!a new jar is on the way..the white was fine..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on October 13, 2020, 09:30:08 PM
Just trying to see the bright side - anything you solder to that box is going to bond beautifully!  :Lol: 

Glad to hear a replacement is on the way.  :cheers:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 13, 2020, 09:35:45 PM
Yup, they dont believe in proper packing anymore...   :ShakeHead:   I love it when they just stick a label on the side of the thin store box and send it out.


Definitely was the right bottle for the black flux, that color goop looks familiar! I figure one bottle is at least a decade supply, if not several.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 13, 2020, 10:31:33 PM
several years back I had ordered some ginger and orange preserves, 4 jars, high end stuff!!! the box was on the front porch and there was a line of ants,, one out of the three jars survived, just one layer of thin bubble pack...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 16, 2020, 11:23:08 PM
did a little more hot work today,, fitting a soldered crankshaft,, have to shape the webs and clean it up a bit..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 17, 2020, 12:21:53 AM
Slim seems happy with it!  The new flux work better than the old can?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 17, 2020, 12:40:25 AM
it worked, but the solder did not want flow as well I'm used to.. I still might do another loctite crank..(getting good at making webs)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 17, 2020, 12:48:15 AM
it worked, but the solder did not want flow as well I'm used to.. I still might do another loctite crank..(getting good at making webs)
Which silver solder are you using? I've noticed that the farther I go towards the Easy or Extra Easy grade the more it flows. Usually I use the Medium, but sometimes the lower grade is handy. Odd names, but at least they seem to be universal.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 17, 2020, 03:06:39 PM
have to check the pack on monday, most likely stay-silver 15,, was gifted several packs a while back,, always flowed well for me,, many of the chambers I keep running had water cooled heat exchangers,, the old units were failing, to fit a replacement required a steel to copper joint and about ten more copper to copper..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 17, 2020, 03:21:42 PM
have to check the pack on monday, most likely stay-silver 15,, was gifted several packs a while back,, always flowed well for me,, many of the chambers I keep running had water cooled heat exchangers,, the old units were failing, to fit a replacement required a steel to copper joint and about ten more copper to copper..
That is a very different type than what I use - the Stay-Silv-15 is a copper/phosphor brazing rod with only 15% silver. The style I use is the jewelry-industry silver solder wire, which is usually copper/zinc with 50 to 75% silver, comes in 20 and 22 guage wire, flows very well. I never tried the Stay-Silv type so I dont know how they compare.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 23, 2020, 08:45:26 PM
not being totally happy with the last soldered crank decided another attempt at a loctite crank was in order,, getting really good at machining web sets now.. I did do a light diamond honing on one of the 5/16th chucking reamers,, it seemed to give better results,, the webs fit snug dry, but slide well with an added drop of oil.. cleaned all with some acetone and using my space gauges glued up the crank.. thinking about setting up the unimat in drill press mode as it is much more sensitive than the mill when it's time to drill for the pins. Gave slim the task of watching the loctite cure over the weekend..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on October 24, 2020, 12:30:18 AM
"Gave slim the task of watching the loctite cure over the weekend.." :Lol:

 I hope the crankshaft works out for you, everything is looking real good & closer to running.
 :ThumbsUp:
 :popcorn:
 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 27, 2020, 06:59:39 PM
carefully drilled the 8 just a smidge smaller than 1/16th through holes to pin the crank,, did some test drilling first,, if I set the mill at full speed plus lots of oil things drilled well, used a syringe and needle to add oil and flush out chips,, lots drill-back-out-oil-repeat.. lightly sanded the 1/16th pins cut from rod..all cleaned and drove them in with 603,, trimmed off the pins and sanded the webs to shape,, I might of got the first crank to warm during this process,, so a tub of cold water was next to the belt sander, quenching made sure the new crank never got even warm.. filed the bearing caps lightly and honed the bore,, fitted the new crank and after a few minutes of hand turning it's very tight fitting but rotates freely and smooth.. still have to cut away the shafts sections but so far this is a much better crank.. slim is already taking credit for the improvements..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 28, 2020, 11:09:19 PM
leaving the crank in the base frame for support the shaft sections were carefully sawn away.. a few minutes on the belt grinder (again quenching often to prevent heat building up) to clean things up and it looks like crankshaft.. all remained nice and true. it will spin freely.. I'm almost back where I was 2 weeks ago..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on October 29, 2020, 12:55:15 PM
Looks good and fingers crossed that it will pass your final test  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 31, 2020, 01:16:31 PM
had to do some fine work to get the connecting rod bottom ends fitting well.  added an oil hole to the upper bearing block.. thinking that a small tube bent and mounted along the connecting rod will act as an supply for the bearing.. there is evidence that this was done.. also thinking oil box with 3 tubes feeding the mains,, good photo of the method used to lube the eccentrics ,, just kind of wondering about bending very small tubes,, maybe I can use a syringe to draw cerrobend up into the small tubes..  The engine is back together with the new crankshaft and waiting on getting the valve timing set.. normally all free time this week would have been spent setting up halloween..(photos from some past years)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on October 31, 2020, 01:44:26 PM
Nice to see that Slim has a bunch of family and pets nearby!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on October 31, 2020, 04:07:35 PM
Slim might feel a bit "out-scaled" but come to think of it he might be the right size to ride one of the cats (that's all the shop needs late at night)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 02, 2020, 09:23:46 PM
engine is back together!!! it's running much smoother, not even screwed down to the wood base,, it will run much slower also.. slim must have got the valves set better this time.. plans are to keep it well oiled and give it some 10-15 minutes break-in runs..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 02, 2020, 10:00:40 PM
Awesome!!  Give Slim the video camera and run it!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 03, 2020, 05:35:03 PM
sorry about the radio noise in the background,, it's getting better all the time.. it will even run a bit slower..
CkeGimAuAJE
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 03, 2020, 05:36:46 PM
 :pinkelephant:   :whoohoo:   :cartwheel:

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Johnmcc69 on November 03, 2020, 05:58:24 PM
 :pinkelephant:
 :ThumbsUp:
Awesome! Nice runner!

 John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on November 03, 2020, 06:19:55 PM
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:

Top notch work, and a great runner! Slim looks pleased with it too. :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 03, 2020, 07:30:09 PM
running on air it is not much better than a single cylinder engine,, things should be better once on steam..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Dave Otto on November 03, 2020, 07:34:07 PM
Nice work!

Dave
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 03, 2020, 07:46:00 PM
running on air it is not much better than a single cylinder engine,, things should be better once on steam..
That is typical for a compound engine run on air, isn't it, since air doesn't expand anywhere near as much as steam? Sometimes I've seen compound models made with two sets of piping, normal cross one for steam and one with inlet per steam chest for running on air (and a narrowed inlet for the larger cylinder to even them out).
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 03, 2020, 08:01:00 PM
I thought about making a set-up for air operation, but for now I'm just getting some break-in rotations logged,, also looking at adding a steam tickler line run the the LP chest to aid in self starting..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 03, 2020, 08:03:46 PM
I thought about making a set-up for air operation, but for now I'm just getting some break-in rotations logged,, also looking at adding a steam tickler line run the the LP chest to aid in self starting..
I saw in the Mann catalog that they did that, assume it was a common thing? Though, wouldn't it back-pressure the HP cylinder through the exhaust? Dont really understand its use.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: john mills on November 03, 2020, 08:27:20 PM
running a big engine compound  or triple the by pass line to the lower pressure cylinder is good to get steam to the other cylinders to get them hot ready for starting but the engines start turning  don't like running until the bypass valves are closed.the by pass valve could be used just to get the high pressure of top dead centre but to run the valves need to be shut.warming up is needed until water stops runningans steam comes out all the drains.often if the pistons are in the right positions once the heat is sufficient and the water stops the engine will start turning.
but won't like running if the bypass valves are still open.
your engine is running  well.you can only hear one cylinder only one has an open exhaust .
John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on November 03, 2020, 08:34:07 PM
On Mallet compound locomotives and also on traction engines a device called a "simpling" valve was used to introduce HP steam to the LP cylinders for brief periods to aid getting the engine started under heavy load or in hilly conditions when extra force was needed. I am not sure if they also blocked the passages to HP exhaust as well as directing HP steam. On N&W Y6b Mallet locomotives and such, I can imagine the exhaust from the 39" dia LP cylinders while using the simpling valve must have been pretty violent. I can imagine more than one fireman watching out the cab window as his fire went up the stack and into the trees!  :cheers:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 03, 2020, 09:01:49 PM
in my reading steam would be supplied in just small pulses to get the LP piston moving while the main throttle was already open.. I'll make some choices once I see how the engine behaves on steam,, I have roughed out a plan for a servo unit and a pair ratchet wheels that would mount to the prop shaft to get things turning in the wanted rotation.. plenty of room to hide this under the aft floor decking..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 03, 2020, 11:04:24 PM
Is the servo mechanism to do the same thing as a barring engine or barring holes would do on a stationary engine?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 04, 2020, 12:59:16 AM
yes, but it's still just a plan,,the simpling system would require a servo or switch also..still looking at other options..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 11, 2020, 11:00:18 PM
most likely  should have done this much earlier,, but took some time to make a some 7BA wrenches,, slim seems to like them...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 11, 2020, 11:20:01 PM
How did you make the wrenches? Drill/file opening? Hardened? 


I tried calling Slim directly, but the questions went in one ear and out his nose.... and mouth...  :lolb:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 11, 2020, 11:36:53 PM
drilled a hole the size of the bolt span, used a needle file in my tapping stand to file out the angles,, then some time on the belt grinder followed by filing and sanding.. debating if they should be hardened,, I still need to harden the rotary table clamps I made a while back.. might be time to get out the torch and an oil quench.

slim claims his hearing is bad do to the lack of ears,, I think it only stops him from wearing safety glasses!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on November 12, 2020, 02:31:12 AM
Is Slim still cheesed off about stepping in the wet layout blue and getting the old blue metatarsal hot foot?  :Lol:

Engine runs great! oh, I forgot about Slim's lack of ears:  ENGINE RUNS GREAT SLIM!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on November 12, 2020, 11:03:52 AM
Quote
Engine runs great! oh, I forgot about Slim's lack of ears:  ENGINE RUNS GREAT SLIM!

No need to shout - Slim is deaf, not Blind.

Nice progress + I like the addition of tools to Slim and I'm sure he apreciates them too  :ThumbsUp:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: gbritnell on November 12, 2020, 12:09:35 PM
The engine runs great, even if it's just on air.
gbritnell
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 12, 2020, 01:44:13 PM
thanks all,working on a fittings so I can test with the building steam (about 20 psi) have to get the oilers and oil lines made.. starting to look at getting the boiler,feed pump and condensate pump off the paper and into solid materials!!!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 13, 2020, 05:53:53 PM
mounted up the non-functioning scale effect only thrust box.. but thinking because an eccentric(condensate pump drive) will be mounted just outboard, it might serve as an additional shaft bearing.. slim it taking to the new tools well,, if he had pockets I'd be worried the he would be taking the tools..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 18, 2020, 06:11:25 PM
happy with the engine at this time,, it will actually run on the HP cylinder, I had the LP cover off and put air to the engine and it ran,, should be fine once I can get it on steam,, it is still in need of details (oil feed lines, way lever quadrant, thrust box lid) started planning and ordered up some stock and parts for the next section,, the duplex boiler feed pump,, true scale would have this at around 3 1/2" long, which is just very small.. played with the plans for the "Coles" pump that is 6" long , reduced the plans by a third and it will be a bit of watch-making at around 4" long.. took the reduced plans and doubled them, also copied some of the navy drawings to the same size,,been doing some rough drawings on how to make this work now it's time to get some final plans together.. need to get slim a drafting table..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 19, 2020, 03:19:46 AM
Very interested in the pump build, one is on my wanna-make-one-soon list. There are several variations on the theme, great to see how this one goes. As I understand it, Coles is no longer in business? Is your starting plan from them, or based on thier style?


Hmmm, if Slim will be at the drafting board, he is going to need a stick-on ear to put the pencil on while thinking...


 :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 19, 2020, 03:50:31 AM
I'm using the coles plans as a starting point to make sure the proportions work, much off the linkages and ports should work off the plans,, the pump end on the navy version has been sailor proofed, 8 check valves with easy access ports,, the trick to this will milling it all out,, but I watched you carve out the stanley block,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 19, 2020, 04:06:32 AM
Getting the popcorn supply replenished...




I'm close to doing the cylinder block on my Mann engine, going to use the same basic setup for the holding jig as the Stanley since it worked so well.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: simplyloco on November 19, 2020, 10:33:54 AM
First time I've looked at this: excellent progress. I presume The Lockdown is responsible for your skeleton staff?
John
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 19, 2020, 11:10:22 AM
slim arrived due to comments about some small skeletons I had for a halloween based project,, the claim was they were a great group of new shop elves until the floor monster "groat" feasted on them.. also some modelers wanted me to include something in the photos to show scale,, slim being 12" tall is correct for the 1/6th scale of this project, plus he doesn't block the view in photos greatly, doesn't complain about not enough cookies or beer like other shop elves,

crueby, yes planning on watching and learning from the Mann engine progress also,, "talent endeavors, genius steals!!!" :ROFL: :ROFL:
thinking that both ends will be machined and bored together with reference surfaces for the center section, plus a pair of stepped rods to match the bores and aid in alignment..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 23, 2020, 08:26:42 PM
working in 2X actual size drew up a plan for the pump this weekend,, it will be a cross between the coles plans and navy type,, not perfect to scale but hopefully still functional..reduced the line drawings 50% to get sized plan.. this will be a bit of watchmaking for the valve linkages..slim seemed to happy but then realized how fiddlely this will be..waiting on a good sized (by my work) chunk off brass to arrive..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 23, 2020, 08:48:01 PM
Does that type of pump have the seperate little shuttle valves, operated by the valve rod sending steam to one end of the shuttle or the other? Or is it a direct acting one with the valve rod sending steam directly to the piston?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 23, 2020, 09:16:14 PM
direct acting, but the valve is operated by the other piston rod, so I guess the would be indirectly direct.. I'm staying very close to the porting,valving and linkages used in the coles.. kind of amazing things, self starting,, there are few vids out of them running.. have kept a watch for a casting kit but no luck..(it would be to big)
U4yldgtw_To
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 23, 2020, 09:34:39 PM
the navy most likely could get away with the less complex pump end because they mounted the units vertical with the pump down.. water tanks were mounted higher in the hull so suction would not have been a big issue,, it just had to make pressure to feed the boiler..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 23, 2020, 09:42:21 PM
Neat stuff!  I've been looking at a few of the designs, and bought plans for the single cylinder one from Friends models as well as the Stuart Turner (didn't know that ST would sell plans separate from the castings before) feed pump. Same general ideas in both, but completely different layout and porting.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on November 25, 2020, 05:17:37 PM
with the holiday and weekend I gave slim some instructions for the days I'll be out,, must be that hearing thing again I'm pretty sure I didn't say "do something with your lazy brass over the next few days"  happy thanksgiving... I'm fairly sure he is doing something with the copper and somewhere in the shop is a scale still in the works,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on November 25, 2020, 05:54:11 PM
Theres a Brass for Every Seat...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 09, 2020, 09:23:53 PM
my lost in transit chunk of brass arrived today,, cut and milled a section that will be the pump end, the cylinder block and some spacers were prepped,, loctited everything together,, slim once again working hard at watching the loctite cure!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 11, 2020, 10:07:51 PM
marked out some lines and off to the mill,, recesses cut for the base plate,, steam and pump bores all done as one unit so at least I'm starting out with perfect alignment.. separated the parts with some heat.. slim is still looking skeptical about it all..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 11, 2020, 10:32:18 PM
Nicely done!

And Slim is not skeptical - he is wondering if he can use loctite to glue some ears onto his head!   :ROFL:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on December 12, 2020, 02:51:41 AM
Could be Slim's just pointing at something on the drawing with his leg and foot while getting ready to scribe another mark with his hands. It would be mighty handy at times to have Slim's reversible hip joints.  :facepalm:   :cheers:  :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: simplyloco on December 12, 2020, 11:38:24 AM
Neat stuff!  I've been looking at a few of the designs, and bought plans for the single cylinder one from Friends models as well as the Stuart Turner (didn't know that ST would sell plans separate from the castings before) feed pump. Same general ideas in both, but completely different layout and porting.

Here's one I restored last year. They do work quite well!
John
qsZ8-X0BYsE
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 15, 2020, 03:31:17 PM
taking a mental health day and spending it in the shop,, milled up the sections that will join the ends, both ends need a lot more work before the solder can flow. also will need to turn a set of guide rods for the joining operation.. slim is looking at little more on board with things..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 15, 2020, 09:49:10 PM
milled up some brass plates and loctited them to the cylinder block, they will become the chest cover and steam passage plate, all will get milled together with the block..  spent the day working out the pump valve seats and water passages,, they are all taken care of..now I have to ram in some plugs where required and start milling and carving it into final shape.. I have a bad feeling slim is thinking about organizing a crap game
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 15, 2020, 09:50:22 PM
 :lolb:   He DOES have a sneaky look about him! 
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 15, 2020, 09:58:36 PM
i"m just glad I didn't have to make two of the pump blocks :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on December 15, 2020, 11:57:40 PM
Craps is one thing - cards are another. At least you know Slim's got nothing up his sleeve, if playing cards - and no sleeve, either!   :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 17, 2020, 02:44:08 PM
started carving the blocks, the set of ball end mills are working great for this,, measured out the jig rods and started one on the unimat and quickly stopped, job much better suited for the atlas (I can turn one rod and part it into two needed) I won a book of ebay under  $20.00 total shipped, 1902 I.C.S Reference Library "Steam Engines and Steam Pumps" lots of good info and drawings, did find a drawing for a porting arrangement for a steam pump that I am looking at very hard,, the idea in that a small amount of steam is "trapped" during exhaust acting as a buffer to limit the piston travel,, seeing that my steam passages will be by an intermediate plate this would be easy to do..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 17, 2020, 05:57:14 PM
chucked up a section of steel rod in the old atlas and turned the "jig" rods.. slim said they looked like ram rods for cannons and said he could do a "jig" he says lots of things ::)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 17, 2020, 06:10:56 PM
Thats an interesting arrangement for the porting on the cylinder. Would it really give a buffer though - the slide valve should be opening the end the piston is moving towards to steam by the time the piston got to the end? Might still be of  help if the pump was not fully primed and there was air in it.   :thinking:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 17, 2020, 10:12:01 PM
that valve motion would be true for an eccentric driven valve but this valve is moved by the other cylinders shaft motion,, will be scratching my head on this for a bit.. :headscratch:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on December 17, 2020, 10:44:48 PM
It might work nicely - but I can't tell as I'm missing a connection between the upper and lower "control axle" on the last drawing ...!...  does it connect linearly or digitally, so to speak ?
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 17, 2020, 11:28:27 PM
it's kind of one of things that doesn't translate well in a 3 view drawing..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Admiral_dk on December 18, 2020, 12:59:47 PM
OK - I didn't see that one comming .... and by the way, if left excatly as shown in the drawing - nothing will happen.

It's kind of funny construction - you can view it as a mix of "digitally" and analog control.
Lets say that the piston  shown in the drawing is moving to the right. When it has gone past midway trawel it will open for the steam that moves the hidden piston toward the left and it will have to wait for the hidden piston to go past its midway travel, before it get steam to move to the left.
This also means that depending on load it will either move in a very jerky (Digital) way or more and more toward a smooth movement with the pistons in a 90 degree phase differense.
Please don't ask me how much load to achive smooth movement as I don't have a clue - it's just what I expect from a dampened Oscillator.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 18, 2020, 09:48:14 PM
set up the rotary table on the mill today( the new home made mounting fixtures worked great) by centering the four jaw chuck and then moving the jaws to put each port under the center the pump block was roughed out.. lots more work to be done on it, but it is looking less like a cube of brass..taking my old book and drafting tools home for the weekend..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 19, 2020, 10:14:49 PM
here's  one I didn't see coming. had some conversations with the full scale steam guys that have been helping me,(these little pumps did use the dual porting!) they call the valve actuation I'm working towards external cross-over,, why? because an internal cross-over exist,, what a bit of watch-making even in full scale!! staying with the cole's model method of handling the valves with the duel porting..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 19, 2020, 10:39:43 PM
Gack - that is a lot of levers inside that cover! I can see why you would lean towards the external levers.  I think it was on the Southworth pump thread that I worked out how they did the steam passages inside the block so they cross over, and the levers/valves can be normal straight-line ones. Just some drilling to lay out, but no fancy Harry-Potter-Goblin-Safe levers to make!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 23, 2020, 09:05:40 PM
did some more shaping both ends of the feed pump.. they are starting to look less like blocks,, need to get the holes threaded for the valve covers and pipe fittings while there are still some good flat sections.. made an arbor for the cylinder block for use in the rotary table on the mill..  looks like there will be lots of dremel machining ahead..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 24, 2020, 06:11:59 PM
started work on the the steam chest,, milled out the main section, the rod guides/glands will be a small lathe projects and soldered into bored holes..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 24, 2020, 09:05:14 PM
Coming along great. I like how the steam chest bolts down on the outside rather than through the rim.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 29, 2020, 07:50:16 PM
did some "small" work today, threaded, drilled and turned the steam valve rod fixtures,, drilled and reamed the chest to fit them, the valves needed a touch more room in the chest so the top and base plate were recessed.. my old heavy duty work table suffered total caster failure,, who-ever built this table welded the casters on,, fastest choice for repair is cutting them off.. a mobile tool base will be here Monday to solve the problem.. it cost about the same as good set of casters,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on December 29, 2020, 08:11:30 PM
Parts are coming along great, but you gotta keep Slim off that cart, he is too heavy for it!   :ROFL:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on December 30, 2020, 09:38:34 PM
started on the turnings for the rear cylinder head,, it will be 3 parts soldered together and then milled to final shape..,, the plate to mount the turnings in was made when with the block was,, they are just proud enough to allow for alignment and a gasket,, one still needs some touch up and is a little tight fit for soldering.. slim gets to stare at them for a few days. he's good at that as he never blinks!!
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 05, 2021, 09:38:55 PM
cleared out the worktable,, attacked what was left of the casters with a grinder and a big hammer,, assembled the new rolling base and mounted one of the new toys,, informed slim that the the rollers has a lot to do with where those flat halloween skeletons are made.. table feel much better now,, stays where you put it... a little bit of shop clean-up and its back to work..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on January 05, 2021, 11:54:20 PM
Slim looked for a minute like he was going to shove that nice new cylinder and cap assy off the bench - but I think your roller comment made an attitude adjustment! Bench / rollers / new toy look great. Slim seems to like it too.  :cheers:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 06, 2021, 06:03:24 PM
the threat of becoming 2 dimensional has made slim a bit more "helpful" (I'm fairly sure he is building a still somewhere in the shop with plans of exporting some form of high proof liquid to the other shop elves) the arbor press arrived,, the decision at the moment is were to drill a hole in the table to mount it.. the table is filling up fast! thinking about a hinged work surface to give a little more flat space,,
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 06, 2021, 06:32:42 PM
I just clamped mine to the edge of the table for use, with the gap in the base hanging just over the edge.
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 06, 2021, 07:03:57 PM
thinking that might work :ThumbsUp:, I could drill a pair of mounting holes and place some threaded inserts(or a threaded plate) in from the bottom.. the table thickness is about 1 1/2". the 3in1 mounting is a little more complicated so it will stay in place.. still thinking about mounting up 3 to 4" vise if I can find the one I like,, saw several  with a rotating body,, flat jaws one side, pipe and tube jaws on the flip side.. smallest is the 5inch version..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 09, 2021, 02:27:08 PM
Not much model work this week with the work on the table/bench. The arbor press has been stored in a lower cabinet until needed. my micro fasteners order that spent 7 days parked at a postal center arrived so with the other not pictured bag of springs,3 types of balls, o-rings and seals I should have what is required to complete the pump.. after 3 days of searching found the vise online that had eluded me. and it was sorta on sale in package deal with another Item that I can use!!! I'll do an unpacking post when it arrives, but it should do fine for model work, at least the clamp mount casting does allow for bolting to the bench-top..
https://www.garrettwade.com/table-vise-anvil-set.html
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on January 09, 2021, 03:16:15 PM
Looking into the future, here is what your vise will look like in a few years!

Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 09, 2021, 03:49:33 PM
looks like it has seen quite a bit service,, but at the rate you turn out work it's seen the use of 4 or 5 of the average craftsman..  if it has survived your shop it should do fine for me.. I do like the idea of getting the small anvil as it will stop me from using surfaces that should not be  pounded on :hammerbash:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on January 22, 2021, 05:53:19 PM
had a few minutes of shop time today,, grabbed the opti-visor and turned the front cylinder covers, they will get a gland fitting soldered in place.. much like the steam chest..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: Vixen on January 22, 2021, 10:15:46 PM
 :ThumbsUp:
Mike
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 10, 2021, 09:30:28 PM
for a little bit of self inspiration decided to lay out the progress so far (shop has been tidied up ready to get back to work)
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on February 10, 2021, 10:20:28 PM
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 15, 2021, 08:57:36 PM
put chips on the new lathe, made the start of the pump end cylinder covers,, first one took a while with setting up new cutters it the holders and adjusting for height(I added extra tool holders to my order) zeroed the DRO's as the part was getting finished, second one zipped right off in minutes..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 16, 2021, 09:05:26 PM
during lunch time today turned out another pair of parts,, one of the items with the new lathe is a 1/16" T shape cut-off blade, works very very nice.. next order will have a .040" thick one added to it..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on February 17, 2021, 01:04:39 PM
Looks like the new tools give clean parting off. Slim looks impressed.  :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: scc on February 17, 2021, 01:55:32 PM
Looking good :ThumbsUp:   Please can you post a photo of the cut off tool :LickLips:       Terry
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 17, 2021, 02:11:14 PM
worth the extra money..
https://littlemachineshop.com/products/product_view.php?ProductID=1728&category=202639332
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: crueby on February 17, 2021, 02:49:17 PM
The ones I use are similar to that, but the wider part of the T on mine is about twice as tall - I like yours better, less to rub on the sides of the cut. Added to my shopping list...
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: scc on February 17, 2021, 05:34:07 PM
Thank you for posting parting tool pics.      Regards     Terry
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: scc on February 17, 2021, 05:35:56 PM
Anybody know of an English supplier ?     Terry
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on February 26, 2021, 06:09:47 PM
not much shop time for hobby work in the last week.. did get a few new toys for the lathe.. collet set for the spindle and a die holder for the tailstock.. decided to make the glands for the pump and steam cylinders,, between the DRO's, collets and die holder the job went very very fast.. slim seems happy about it all.. also added the longer bolts so my 4" 4 jaw will mount on the lathe..
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 02, 2021, 11:17:41 AM
so much for the burst of work this week,, 4 stitches in a finger yesterday, have to keep it clean, at least it's not on my dominate hand..damn slim is laughing about "flesh wounds" :Mad:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: cnr6400 on March 02, 2021, 02:42:10 PM
Take care of the finger ouch. Sorry to hear Slim's being such a bonehead about it. (er......not that he has a choice)    :Lol:
Title: Re: 30ft 1890's navy steam launch 1/6th scale
Post by: tghs on March 02, 2021, 03:59:41 PM
to alter a great line , slim is not that bad he's just molded that way
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