Mailing List flyrotary@lancaironline.net Message #36135
From: John Downing <downing.j@sbcglobal.net>
Subject: Rust
Date: Mon, 12 Mar 2007 20:27:02 -0500
To: flyrotary <flyrotary@lancaironline.net>
Charlie, you had the right idea about the aluminum bottle.  I had the propane bottle built and there was some petroleum residue in there that the acid didn't want to touch, so I'm thinking that I can just saw the bottle in half and clean it, weld back together again, no big deal.  I didn't notice anything unusual about welding when I welded the fittings on the side and filled the vent holes in the top that I drilled to purge the bottle, but when l tried to weld the bottle back together, it started to bulge and crack along the weld and I just couldn't get it welded even trying to stress relieve it.  So tomorrow I'll order up some weld bungs for the fire extinguisher bottle, as I have two or three of them lying around here.  Some times all the welding experience in the world doesn't prepare you for the unknown.  JohnD
 
         If we homebuilders charged ourselves time at the going rate we would have some very expensive aircraft
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