Trevithick dredger engine – second silver soldering session.
Soldered the bushes, the boiler supports, and the engine support. Did not quite have time to tackle the boiler main end flange.
Actually, this was not the first brazing session. It was the third. I had previously silver soldered the firetube. And if you have been watching this build you might recall that I bronze brazed the domed boiler end and the boiler wrapper, and the vertical cylinder into the domed boiler end. Despite the copper reaching red heat during today’s session of silver soldering, the bronze joins remained intact. Bronze has a higher melting temperature than silver solder. Which was one reason I did the bronze brazing first.