Search found 1785 matches

by Lopez Mike
Mon Jun 29, 2020 5:02 pm
Forum: General Steamboat stuff
Topic: Flying a (steaming) kite
Replies: 25
Views: 856

Re: Flying a (steaming) kite

Hasn't this been done with screw in flare fittings or some such solution? That would take care of the slightly out of round tube issue. Or is the wall thickness of these recommended tubes too much for flaring? Or is a flare fitting not allowed inside for a boiler. I've certainly had a flare fitting ...
by Lopez Mike
Sun Jun 28, 2020 5:22 am
Forum: General Steamboat stuff
Topic: Flying a (steaming) kite
Replies: 25
Views: 856

Re: Flying a (steaming) kite

That's a very interesting design. This coming from a VFT devotee! One thing that would concern me would be how to make sure that the tubes were still round where they meet the drums. It's not that far from the tube/drum connection to the first bend. Maybe a temporary mandrel in the end of the tube t...
by Lopez Mike
Sat Jun 27, 2020 2:38 am
Forum: Technical - Engines and Boilers
Topic: Viability of brazing a tubesheet?
Replies: 13
Views: 385

Re: Viability of brazing a tubesheet?

Coal? What are coal?

The coal I can get there in the N.W. United Sates is so bad. You get more clinkers back than you put coal in. Add to that the mess and stink and I'll pass.

Good to know about the sulphur issue.
by Lopez Mike
Fri Jun 26, 2020 4:43 am
Forum: Anoraks Corner
Topic: Deception?
Replies: 10
Views: 4119

Re: Deception?

I spend my winters in Mexico and a VPN is a good thing for me as there is all sorts of content that is geographically blocked for one reason or another.
by Lopez Mike
Fri Jun 26, 2020 4:41 am
Forum: Technical - Engines and Boilers
Topic: Viability of brazing a tubesheet?
Replies: 13
Views: 385

Re: Viability of brazing a tubesheet?

I have a stock of brazing rod called Sil-Fos. No flux needed with copper. A somewhat less expensive alternative to Silver solder. But I haven't tried it with ferrous materials. It's intended for only copper to copper I think.
by Lopez Mike
Mon Jun 22, 2020 2:37 pm
Forum: Technical - Engines and Boilers
Topic: Viability of brazing a tubesheet?
Replies: 13
Views: 385

Re: Viability of brazing a tubesheet?

Fred, How about silver solder. I stick carbide bits to mild steel shanks for lathe tooling once in a while. When I'm impatient I get the tool smoking hot when machining, maybe even red, and haven't had one come loose yet. I do use a very high silver content solder though. On reflection about my earl...
by Lopez Mike
Sat Jun 20, 2020 4:44 pm
Forum: Technical - Engines and Boilers
Topic: Viability of brazing a tubesheet?
Replies: 13
Views: 385

Re: Viability of brazing a tubesheet?

I have done two all copper locomotive boilers using brazing. And I will not do it again! The high conductivity of copper meant that I had to essentially immerse all of the boiler in vermiculite in order to get the working area hot enough. The whole experience was like sticking my head in a firebox. ...
by Lopez Mike
Mon Jun 15, 2020 3:10 am
Forum: General Steamboat stuff
Topic: Flying a (steaming) kite
Replies: 25
Views: 856

Re: Flying a (steaming) kite

$75 bucks is really inexpensive to have a tube sheet done. I'm impressed. Having done several over the years, and at times when I had very little cash and lots of time, I can attest to the fact that beyond good control over the diameter of the holes, the rest can be low precision. I have laid out th...
by Lopez Mike
Mon Jun 15, 2020 2:51 am
Forum: General Steamboat stuff
Topic: Flying a (steaming) kite
Replies: 25
Views: 856

Re: Flying a (steaming) kite

On a recent locomotive boiler I rolled in the tubes since it took no time at all and kept the two tube sheets aligned nicely for welding into the shell. But I then did a TiG sealing weld around the end of each tube. And I still had two tiny weeps due to my beyond amateur TIG skills. Took five minute...
by Lopez Mike
Sat Jun 13, 2020 2:20 am
Forum: General Steamboat stuff
Topic: Flying a (steaming) kite
Replies: 25
Views: 856

Re: Flying a (steaming) kite

I agree with Fred. Make it a VFT. The intended use will be a first timer. Leave the cross/reverse flow, monotone, internal pump, supercharged whiz bang stuff for a later project when disappointment and teething problems won't be so devastating. With the advent of CNC to take care of the tediousness ...