Heat treating aluminum header?

[Steven Maxwell]

 Don't remove the material from the weld aluminum needs the strength of the weld build up to last don't go for looks go for reliability, I worked sheetmetal for 35 years and if you want or need strength leave the filler rod.it will last better if you purge and get 100% weld, and dress up like Karl does.
 Steve Maxwell


----- Original Message ----- 
From: 
To: discussion at nsrca.org
Sent: 9/7/2005 7:39:34 PM 
Subject: Heat treating aluminum header?


After many many flights, I had an aluminum header break for my OS 1.60.  I had it welded up by a very good welder, but the header broke again after one flight in an area removed from the weld, but close enough that it would have gotten pretty hot.  I suspect that the heat treat of the header got changed.  Any ideas on how to try to heat treat a second pipe that has benn welded to try to at least get more than one flight?  I've odered a new header, but it is not here yet.

Thanks

Jon Lowe
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