Building a 31/2" Gauge Locomotive Engine

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sbwhart:
Thanks for your support Guys

Nick LBSC words and music give three options for making the chimney:- 1: casting, 2: fabricate on a bit of 1" tube with soldered rings, 3: solid from a bit of 1 1/2" squ of material, I guess the chimney for your engine used option 2: . From the works drawings the square base is riveted to the chimney with the whole lot bolted to the smoke box, so yours is probably a truer representation, I'll have to have a think as to how I can simulate those rivets.

I think engine chimneys are very important to the visual appearance of an engine, its the first thing the eye sees.

--- Quote from: Divided he ad on March 24, 2010, 08:23:14 PM ---
Looking forward to the rest :thumbup:

Ralph.

--- End quote ---

I didn't think you'd been working that hard

:lol:

Have fun

Stew

Divided he ad:

--- Quote ---I didn't think you'd been working that hard
--- End quote ---

Ok... :poke: Taken!

But I have been working..... On my car. Ruptured the fuel tank on a rock :doh: :bang: :wack: :( So spent most of last night fixing it..... No, not welding etc (I'm not stupid!)

Drilled out the crease and used this strange, erm, well, kinda like home diy captivated thread making kit and some chemical metal.

Done it before and it worked, so did it again and it seems to be ok..... So far! Well it's stopped me needing a new 100+ Quid tank this weekend I think?

Anyway :offtopic:

Rivets? Maybe you'll have to solder/bond a bunch into holes drilled using the indexer/RT? Might work?

Still enjoying the thread :thumbup:

Ralph.

Stilldrillin:
By `ek Stew! :bugeye:

Now........ That`s blummin impressive! :bow: :bow:

Well done! :clap:

David D

sbwhart:
Thanks guys

Hard luck with the tank Ralph but it sounds like you got a good fix.

Drilling the hole in the chimney small drill then bigger then bigger then 7/8 to take the copper liner.

Then part it off.

Now a bit of forward planning is required the chimney still needs the base flycutting to match the smoke box but I can't do that until I've made the smoke box, it will be an awkward shape to hold its got a 1 1/2 deg taper and all those radiuses and flanges to get round, to machine the taper I set the compound over, so without changing the compound bore out a collar at the same angle.

Split it and you've made a split collar that will perfectly match the chimney taper.

Her it is being used to clean up the base of the chimney after parting off, this will help when I come to set it up to fly cut the rad in the base to fit the smoke box.

Her is the chimney part finished with the copper liner and the collar I'll safely store them away.

That another off the list.

Stew

raynerd:
Nice work Stew, I don`t post too often on here because I have nothing useful to say other than this thread is certainly an excellent lesson for me and I am still following this with interest.
Chris

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