Author Topic: CONWAY 0-4-0 3 1/2" GAUGE LOCO  (Read 60069 times)

Online 10KPete

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #525 on: July 28, 2018, 01:26:13 AM »
I believe that the pointy end of the super heater goes in from the smoke box and protrudes into the fire box a fair distance...

You show your tape measure going the other way.

Pete
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Offline Gary Brooke

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #526 on: July 28, 2018, 04:32:35 AM »
As far as I understand it they stick into the firebox a fairway. Nice engine by the way.
Rgds Gary

Offline Steamer5

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #527 on: July 28, 2018, 06:32:35 AM »
Hi Rich,
 Pete’s got it right. The superheater goes into the firebox. Supposedly you get more heat, superheaters etc. You wouldn’t try this with copper as you would likely melt it when you have the regulator closed. My copper ones were in flue, done lots of work & got eroded thru, buggers up a nice days steaming!
We had a discussion here awhile back re superheating, my thoughts being that we get drier steam hence more volume, better work etc, but as to superheating we don’t dry the steam prior to superheating as in full size practice hence little or no superheating as a result. You do get better performance.

Cheers Kerrin
Get excited and make something!

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #528 on: July 28, 2018, 09:34:50 AM »
Hi

Thanks Pete, Gary and Kerrin

Here's the article



One more question please. On the plans the pointy end as Pete put it  :Lol: says it should be brazed while the joint to the copper pipe should be silver soldered but in the text he says to braze the joint.  :headscratch:

Is silver solder ok or should it be brazed. I always understood brazing to be done with brass or what is sometimes called
sif bronze. A bit confusing

Cheers

Rich

Online crueby

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #529 on: July 28, 2018, 01:47:14 PM »
Silver soldering is a form of brazing, sometimes it is called silver brazing, just uses a different filler rod than what most think of in brazing.

Offline Steamer5

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #530 on: July 28, 2018, 06:13:44 PM »
Hi Rich,
 Had mine TIG'd into the block, plus the plug of the cross drilled hole. Mate did a lovely job!

Wish I had thought of , seen an article on, using a copper sleeve to join to copper tube. Getting the stainless to line up & silver soldered into the brass header fitting was a pain. Second header fitting had to be made as the first one got a bit hot!

Cheers Kerrin
Get excited and make something!

Online 10KPete

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #531 on: July 28, 2018, 06:49:40 PM »


.....the pointy end as Pete put it  :Lol: says it .....

Cheers

Rich

Well, hey, I don't know what it's called... :shrug: :shrug:

 :lolb: :lolb:

Pete
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Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #532 on: July 29, 2018, 08:21:45 AM »
Hi

Thanks Kerrin, Gary and Pete  :ThumbsUp:

Back to the wet header the part is set up in the rotary table



And has 3 holes drilled



The front part is now parted off. Sorry no photo.

While the rotary table is in the same position a bit of scrap steel has the same 3 holes drilled



The body is cross drilled and has the 3 holes opened out



And the front part tapped



A trial assembly





Make up the threaded boss





Loctite is used to fix in 3 pins to finish the tool for tightening the wet head body into the boiler



Cheers

Rich

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #533 on: July 29, 2018, 04:12:22 PM »
Hi

The super heater pointy end  :ROFL: starts life as a bit of stainless round bar in the mill



Using the DRO centre drill then drill





Then counter bore



Cross drill and tap. The cross drill is over size for tapping size but enough thread is cut to hold the blanking plug





Machine away the waste



Thread a bit of stainless steel rod and make a plug








Cheers

Rich




Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #534 on: July 30, 2018, 07:33:19 PM »
Hi

I'm getting closer to the point where bits have to fitted and fettled but before that happens the frames need to be finished and painted.

I can't remember now who it was many many pages back who mentioned that the boiler blow down valves don't line up



So thats one job.

Spot the cylinder mounting holes



Drill the holes



Machine clearance for the blow down valves



Drill a couple of holes for some little brackets that hold the boiler down



Cheers

Rich


Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #535 on: July 30, 2018, 08:12:22 PM »
Hi

I also need to make and fit the brake gear to make sure everthing misses each other. Starting with the 4 brake hangers. I drilled the 3 holes in each one using the DRO. Then bolted together and mounted on a sacrificial ally table the ends are machined. They fit inside the frames and for the most part can't be seen so I am not going to bother with the cosmetic shaping.





The brake hanger pins I have made from stainless steel and used M4 for the threads as I have some stainless steel M4 nyloc nuts. Similarly i have not bothered to shape them as they can't be seen



The brake shoes next. I drew out the size of the ring I would need



Then a rare flash of inspiration, I remembered I had some large washers, just got to find them :headscratch: :old:

Ah Haaaaa





After a bit of machining






Print out some exact size brake shoes and stick on



Cheers

Rich





Offline Admiral_dk

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #536 on: July 30, 2018, 09:17:44 PM »
Brilliant use of the spacer  :ThumbsUp: and Drats on the boiler blow down valves alignment  :censored: - but you solved it too  :cheers:

Offline zeeprogrammer

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #537 on: July 30, 2018, 10:20:32 PM »
Still  :popcorn: and enjoying.
Very nice work and I enjoy the detail.

I have to admit...I also look to see if there's a shot out your window. Woohoo! Caught a sight of your bench.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Online Kim

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #538 on: July 31, 2018, 05:22:53 AM »
You're moving right along, Rich.
Enjoying the show! (pass the popcorn, Zee!) :popcorn:
Kim

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #539 on: August 03, 2018, 10:00:15 AM »
Hi

Thanks Admiral, Carl and Kim  :ThumbsUp:

I hope to get a little workshop time today after the chores are done  ::)

Cheers

Rich