Hot cap is mild steel tube turned down to make it thin. I tig welded the end cap on. I tried to braze the end cap but it got so hot the braze would drip off. Right now I'm trying some jb weld extreme heat crack sealer. So far so good. Seems to be kind of a ceramic material that holds up to 2400F. Looks ugly and slopy though. To do it right I might remake the hot cap flange and tig that on to the tube. Its aluminum now because I had the material on hand. Kind of nervous to tig material that thin.Ian S C wrote:That's excellent speed, just needs a bit of engineering to redesign the hot end. If you haven't broken something, you are not really trying hard enough, the hot end probably needs to be brazed into the flange, what is the hot cap made of?
Ian S C
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