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| Building a Boiler for a 3 1/2" Gauge Locomotive |
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| Bluechip:
Stew What size Cu Rivets???? I got some RH 1/16" x 1/4" ... ??? Yours if yer want 'em .. Due to be dumped shortly Dave BC |
| Rob.Wilson:
Hi Stew Your making a great job of building the boiler ,,,,very clean work :bow: :bow: :bow: :bow: Cheers Rob |
| sbwhart:
Dave thanks for the offer of the rivets. Cheers Rob Well got the first joint soldered the fire box outer rapper extension:- the part to be joined were given a soak in the pickle for 1/2 hr then throughly cleaned with some wire wool, flux applied and the extensions were loosely riveted in place. Then onto the hearth a piece of solder was cut the length of the joint and placed on the joint I did an outside and an inside joint at the same heating, and I bunged the thermal blanket up the tube to keep the heat where I wanted it. fed a little solder into the joint and onto the head of the rivets I let it cool for five minutes then quenched it in water then into the pickle for half an hour, the pickle was then washed off in water, and the joint inspected, apply another dollop of solder to the joint, then with the boiler flipped over the other way and with less solder this time and the whole lot heated up again and a little more solder fed into the joint and on the other side of the rivets. Back in to the pickle as before another clean and inspection not to happy with a couple of areas so again as before more flux and a bit more solder in the areas on concern. Here we go outside. And inside Well thats me done for the day the rest of the day will be taken up with that great British institution:- the family barbeque, that is traditionally held on the first and often only dry sunny day of the year. The pleasant sound of birds song and smell of flowers will be replaced by the sound of male of the household cussing as he struggles to get the barbeque lit and the stench of charcoal, lighter fuel, and cremated sausages. Cheers Stew |
| Stilldrillin:
--- Quote from: sbwhart on May 23, 2010, 07:54:40 AM --- Well thats me done for the day the rest of the day will be taken up with that great British institution:- the family barbeque, that is traditionally held on the first and often only dry sunny day of the year. The pleasant sound of birds song and smell of flowers will be replaced by the sound of male of the household cussing as he struggles to get the barbeque lit and the stench of charcoal, lighter fuel, and cremated sausages. Cheers Stew --- End quote --- Don`t believe you Stew! :) I think you will apply the same logic and workmanship to the "family entertainment", as to the loco build...... :coffee: :med: Enjoy your barbie! :thumbup: David D |
| madjackghengis:
--- Quote from: sbwhart on April 27, 2010, 02:33:46 PM ---Thing have been a little slow, bin on Gardening Duties and looking after our grand son. Any way made some progress with a backward step thrown in, more about this later. Made the former for the backhead plate you this former for the throat plate as well. First square it up so that you've got four good edges on each face, then blue it up and mark it out on the mill. Then centre pop the line to give you something to work too. Then mill out the shape I used the rotory table this time, it just fitted the clamping is not too elligant, but hay:- its effective. Then it was just a matter of tidying up the plates on the former her they are all done with the formers. Now to drill the tube plates now I know that "drilling soft copper can be tricky", :bang: I've seen lots of pics where guys have mounted tubes plates onto lathe face plates so that the holes can be bored because "drilling soft copper can be tricky" :bang: but for some reason I decided to do the drilling on my pillar drill, its not a bad pillar drill but its not as good as my mill for drilling, I clamped the smoke box tube plate onto a plank of wood and drilled the first 3/8" hole all was well, now I know that "drilling soft copper can me tricky", :bang: second ran out nearly into the first hole that I drilled, I stopped and tried rectifying it by drilling from the other side but this only made things worse:- strike one tube plate :bang: :bang: :bang: :bang: :bang: :bang: OK it's a scrapper:- so decided to drill the rest of the holes any way to perfect the best method. Over too the mill:- this is the set up, the plate was position over a slot for the drill to run into and clamping onto a chunk of wood in the middle, so the flange wouldn't be damaged. That worked like a dream why didn't I do that to begin with :bang: OK have a go with the 3/4" supper heater holes now I know that "drilling soft copper can me tricky", :bang: so similar set up, but this time I sat the plate on some parallels flat side on, as the 3/4" was to wide to fit between a slot,:-a 3/8" pilot drill then straight in with the 3/4" now I know that "drilling soft copper can me tricky", :bang: that one wandered off centre as well I should have used another pilot drill. OK second 3/4" hole this time 3/8" followed by 1/2" followed by 3/4" perfect This is the scrap plate, the 3/4" hole on the left is the one that run out. you can work out for your selves which 3/8" hole went wrong. Guess what I'll be buying at the Harrogate show, still I've got the formers know. Stew Who knows that "drilling soft copper can me tricky" :bang:Hi Stew, since I haven't built a boiler yet, and you're doing such a nice job, I've been going back over what you posted, from the beginning, to get a better set in my mind, of what you've done, and run up against. As I went through this part where your drill wandered far and away, I was reminded, copper can easily be welded up, using tig, and good quality solid strand electrical wire, so that hole that wandered off could have been filled in, and re-drilled, just as a note, no criticism, and it brought to mind, I once welded up a diesel fuel tank for a boat that was all copper, and did it with oxy-accetalene, which works well, but requires a good eye for color, much like aluminum does, for the same reason: drop out. Nothing relavent to to the current state of the thread, just thought I'd add a couple of bits which came to me late. Still enjoying the build log, beautiful work :headbang: mad jack --- End quote --- |
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