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| Building a Boiler for a 3 1/2" Gauge Locomotive |
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| sbwhart:
Thanks guys I picked up the idea for the Hearth from another forum I'm just passing along someone else's ideas. Got some of the boiler bushes made whilst waiting for the rivets to arrive. The bush on the left is for the safety valve, the drawing states 3/8"*26 thread, checked with Reeves what thread they sold their safety valves with 3/8*32 so thats what I made it, the middle two are for the regulator they screw into the end plates, the one with all the holes is soldered into the boiler barrel and the steam dome fastens onto it. Stew |
| Dean W:
You make some nice, clean looking bits, Stew. Fittings look top grade. Dean |
| sbwhart:
Thanks Dean Well this has been a very frustrating week, I ordered the 1/16 copper rivets on Monday on Friday I got a call from the supplier to say they were out of stock :-\ , so I've reordered from another supplier, in the mean time I've got on with some house jobs and earned a few brownie points, and made some more bushes, and bronze screws to hold the boiler together whilst its soldered. I found that the boiler flue tubes varied in length by 1/8 they need to be all the same length or the sort ones will be at risk of coming adrift during soldering. Skimmed one end square de-burred the bore and skimmed the Dia for 3mm for a lose fit in the tube plate. Then found the shortest tube and set the hight gauge to that and marked all the other tubes off to that length. Skimmed the length to the mark and turned OD same as the other end. With all the tubes trimmed to length and a small step turned time to have a trial assembly to the tube plates. The smokebox tube plate is the wrong way round, this is because I want the end of tubes to sit flat on a plate whilst I solder the tubes to the firebox, the smokebox tube plate will be one of the last things to be soldered so I must remember to turn it round. My plan is to solder the wrapper extensions first then the throat plate and wrapper, but I need those darn rivets if I don't get them soon it will be plan B turn some 1/8 rivets down. Stew |
| Bernd:
Looks real clean there Stew. :thumbup: Shouldn't be any problem silver soldering them in place. Bernd |
| sbwhart:
Thanks Bernd Went to the club track to see if I could touch base with the boiler inspector, and find out if he will be around next week, he wasn't there but I was telling one of the members about the my lack of rivets, he said I've got some you can have just follow me home, People can be real nice:- So looks like I'll be soldering next week. Stew |
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