Submitted by Anonymous on Wed, 09/16/1998 - 01:56 Forums: LML Archive From: Marvin Kaye <marvkaye [at] olsusa.com> Subject: Welding Date: Tue, 15 Sep 1998 21:56:13 -0400 To: <lancair.list [at] olsusa.com> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Any welders out there? I'm curious about the proper method to use when welding together an assembly like an engine mount. When looking at the completed O-360 dynafocal mount supplied by the factory, it looks like all of the parts were setup in the fixtures and all of the welds were then completed en-masse at each junction. I'm wondering if it's acceptable to weld up subassemblies, then weld the fixtured parts to the welds that exist on the subassemblies separately? Case in point... if you look at the firewall mounting pads on the engine mount they are each constructed from a steel washer with a piece of thick-wall tube (which accepts the mounting bolt) welded to it along with all the trusswork. If all of the components were welded at the same time, the areas on that little mounting pad which are covered by the ID of the trusswork tubing would not have any welds. I am thinking about welding up the mounting pads first, then fitting the trusswork in and welding to the pad and its welds... make sense? Which way is right... which way is stronger... what is the accepted practice? <Marv>