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| Bog's Paddleduck Engine |
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| kvom:
John, The machining was not really a big concern in starting out on this build, (knock on wood) especially with the details you provided. My big concern is the silver soldering, which will be completely new to me when I get there. Kirk |
| Bernd:
Kirk, Nice work on the cross heads. You made it sound very simple. I see Bogs is keeping an eye on you while you build. One of these days I'd like to build one of these engines too. Bernd |
| bogstandard:
Kirk, I go fairly deeply into silver soldering the parts on the build sheets, purely for the reason you have said, it can be a very daunting task when you have never done it before. If you can get it mastered, it will open up a totally new area of model engineering to you, by allowing you to make joints that are stronger than the parent metals. It is a shame I cannot send you the items I use, but I don't know how customs would react to little packets of a very fine white dust. But I will see what I can do for you. The flux and the fine silver solder wire are the two things that would make it so easy for you. Let me have a root in my box of tricks, and I will PM you. John |
| sbwhart:
Kirk You'll be ok with the silver soldering Johns instruction will put you right, newbies struggle getting the temperature right try it on a bit of scrap first, when you hit the correct temperature the solder just flows like water. Keep the bits clean and use plenty of flux. I used a small plumbers gas blow lamp for a long time, and got good results, see my loco build post for the last month, for pics of heat source. Good luck Stew |
| kvom:
I have read the soldering techniques in John's writeup, and will certainly try it out on scrap first. I asked about firebrick at Lowes and was told they don't carry it. I need to visit a shop that builds fireplaces to get a few. I have a "mapp gas" torch that I think will generate enough heat, as that is what we used to silver solder the joints on the linesets for my AC lines. I'll look for citric acid one of these days. There are some eBay vendors selling silver solder wire that looks appropriate: 56% silver. In any case I still have weeks of machining to go. |
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