That's not quite true. Tig is certainly easier to do a top quality job, but MIG is also acceptable provided that the penetration is good and the welds are good quality. You may also need to normalize the 4130 after MIG welding. Acetylene welding is also acceptable practice, provided that the weldments are of good quality.
I usually tack with a MIG, then weld with acetylene simply because that's what I do best and I don't have ready access to a TIG. That includes having scratch built the engine mount for my Avid Flyer when I adapted a VW to it. Reference AC 43.13B for more info on acceptable practices. The Stinson 108 line was all welded at the factory with stick welders and they are known for being pretty stout airframes. Jeff Scott -- "Golden, Kevin" <kevin.gol...@churchdwight.com> wrote: Ron, You shouldn't use a mig to weld airplane parts. The archives speak of this. TIG is ok, MIG is not. Kevin -----Original Message----- From: Ron Smith [mailto:mercedesm...@yahoo.com] Sent: Monday, July 18, 2005 12:51 AM To: kr...@mylist.net Subject: KR> lincoln 3200 hd Hello Knetters, I just bought a lincoln 3200 hd mig welder today. I got it almost brand new for 240 dollars U.S.( the guy wanted 350 two weeks ago), at the swap meet. I need to add an argon bottle for gas sheilding. I was a pretty good stick welder when I was a kid using my dad's welder. I ran a few beads today, but I can tell I'm going to need some practice with different settings and such. I plan to weld the engine mount, the rudder pedals, and the dual stick, and exhaust pipes. Any tips? P.S. Even if I were never to finnish this plane,( Oh I will) I have the some of the coolest tools now!!! Ron Smith, kr2ssxl, boat stage Cypress Ca _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html *The information contained in this message may be confidential and/or subject to legal privilege, and is for the use of the intended addressee only. Any unauthorized use, dissemination or copying of the information in this message is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message.* _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
