Author Topic: Bodging with Boris........  (Read 5586 times)

Offline Admiral_dk

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Re: Bodging with Boris........
« Reply #30 on: November 07, 2016, 08:15:16 PM »
Very worth the effort - a nice runner  :praise2:

Online b.lindsey

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Re: Bodging with Boris........
« Reply #31 on: November 07, 2016, 09:25:55 PM »
OH excellent....quite a fine runner too!!  Well done.  :ThumbsUp:

Bill

Online steamer

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Re: Bodging with Boris........
« Reply #32 on: November 08, 2016, 01:31:05 AM »
It's a runnah!!!!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Dave Otto

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Re: Bodging with Boris........
« Reply #33 on: November 08, 2016, 01:47:59 AM »
Nicely done David!


Dave

Offline Roger B

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Re: Bodging with Boris........
« Reply #34 on: November 16, 2016, 11:22:52 AM »
Nicely done  :praise2:  :wine1:
Best regards

Roger

Offline sbwhart

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Re: Bodging with Boris........
« Reply #35 on: November 16, 2016, 08:56:01 PM »
Wot a butey Dave

A real nice runner

 :whoohoo: :whoohoo: :whoohoo: :whoohoo:

Stew
A little bit of clearance never got in the way

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #36 on: October 15, 2017, 08:31:37 PM »
Yikes! It has been almost 11 months, since I posted anything about this, shambles!   :embarassed:


As we can now, all, see the previous Pbucket pics, using the appropriate add ons.......

Firefox.....  https://addons.mozilla.org/en-US/firefox/addon/photobucket-fixer/

Chrome..... https://chrome.google.com/webstore/search/photobucket_hotlink_fix?hl=en


I'll continue with, Blundering with Boris.... Hope, there's still some interest!  :facepalm:


After some 10mins running, at Earl Shilton show. The crank assembly began rocking from side to side, on it's single, 5mm wide upright!

Reminded me of stepping into a rowing boat/ dinghy........




Secured with M3 countersunk screws.......




Up close. "You could stick yer cap neb, under there!".......




It's almost stood on tiptoe! The column base isn't flat 

You can see the rub mark, of the "keel". Inboard of the outer two screw holes.......




It's needing a new crankshaft assembly. With bearings at each end. I'm on it.......   



I wondered, why the new displacer insisted on catching the inside of the hot cap.

The shaft guide was at an angle, having been hammered into the bulkhead......   




Time to strip, completely. And, totally rebuild, to my spec......




I've taken the pics, as I've gone along. Not always, in sequence.....

First job, was to get rid of the unnecessary/ leaking, water jacket.

Four inch dia. Made  from tough stainless steel. Not easy to machine, with a mini lathe's lack of power.....




What a mess, in there!




I intended incorporating the end flange, into the cooling fins.......




But. The darned thing fell off. After I'd drilled the new screw holes.....




Yet another "interesting situation", needing a solution........   :facepalm2:



So..... While thinking what to do, about the detached flange. I set to, making the cooling fins.

Around 4"/100mm diameter.

Started with, square, 5mm thick blanks. And, one off at 8mm thick, to screw to the bulkhead.

Using 3 stops, on the mill table. Means I can locate/ relocate all blanks, accurately. Every time......




Making it easy, to mill off the corners. Instead of sawing......




Also, to drill a central, 6mm hole.......




A piece of 4" dia steel, in the chuck. Faced with wide insulation tape. Plus a lump of spare nylon......




Friction turned the remaining corners away........




Giving, a handful of discs, all the same diameter.


Moved onto the mill.......




Removed the centre areas. Just undersize, to the hot cap o/d of 47mm......




Parted off, five, 63mm dia blanks. From bar stock, and removed the centres, too.......




After finish boring, on the lathe. A quick mock up......




I think that looks ok. So far....   

Thanks for looking in.....  :ThumbsUp:
« Last Edit: October 16, 2017, 01:52:22 PM by Stilldrillin »
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Jon Cameron

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Re: Bodging with Boris........
« Reply #37 on: October 15, 2017, 08:48:50 PM »
Keep on Bodging David  ;)


Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #38 on: October 15, 2017, 10:47:19 PM »
Keep on Bodging David  ;)

Thanks John!

It's nice to see you over here, too.....  ;)
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Jon Cameron

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Re: Bodging with Boris........
« Reply #39 on: October 15, 2017, 10:57:14 PM »
Seemed only right since I want to build steam engines now, instead of just repainting, polishing, and soldering existing ones.

Online b.lindsey

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Re: Bodging with Boris........
« Reply #40 on: October 15, 2017, 11:09:38 PM »
Time flies as they say David. Good to see an update on this one.

Bill

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #41 on: October 16, 2017, 01:01:36 PM »
Thanks Bill!  :ThumbsUp:


I eventually, got my head around the hot cap, sealing/ retaining problem.

Finding a piece of correct diameter, tube. (It just happened to be bronze). I silver soldered a ring, to replace the original flange.....




Recessed, the new holding flange.......




The cylinder/ spigot, protrudes through, by "a couple of thou'". To make a positive location/ seal, against the bulkhead.......




Held on, by three, neater than original, screws........




Secure......




Thanks for looking in!   :)
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #42 on: October 16, 2017, 01:40:10 PM »
I hate to see engines, held onto their wooden bases using, obvious, wood screws. I prefer engineering screws. Button heads, look ok.

Or, in this case. Countersink.......




The two rear fixing holes are now, under the bearing pedestals.

Had to drill a central hole.......




I drill, clearance holes, for the screws.
Underneath. I counter bore 15mm deep. The same diameter, as the nut's a/f measurement.

I can then pull the nuts, captive, into the recess......




Thanks for looking in!
« Last Edit: October 17, 2017, 07:04:10 PM by Stilldrillin »
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #43 on: October 16, 2017, 07:27:12 PM »
New, improved, crankshaft location.....

The two uprights, are made from 6mm thick angle iron. Cleaned up, square, on the mill. Dowelled and screwed in place, from underneath the base plate. Allowing removal, and accurate replacement, when necessary.....

The two, outer bearing housings, are a sliding fit, in the uprights. Held in place with slidelock........




The inner bearing housings, slide over the smaller diameter.......




Butting against the upright. Also, held with sleevelock.......




Should be much more effective than the wobbly, original assembly.

Thanks for looking in!
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Roger B

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Re: Bodging with Boris........
« Reply #44 on: October 16, 2017, 09:18:32 PM »
Looks to be a good 'redesign' of this engine  :ThumbsUp:  :ThumbsUp: I await the first trials  :wine1:
Best regards

Roger