swinn Posted August 29, 2005 Share Posted August 29, 2005 Decided to replace the extrusions on the firewall on which the engine mount is placed on the Long-EZ. The previous builder had drilled several non standard holes in this extrusion for a custom engine mount scheme that I'm not comfortable with. The old pieces are now removed. I'll be using a heavier engine than was specified in the plans (360) so I'm going to put in steel angle instead of the plans specified aluminum angle. I read in a CP 86 (Oct. 1996) article that at least one person had experienced cracking of the extrusions with heavier engines hung on the aluminum. 4130 was used as a replacement. Anyhow, the only way I can find to get 4130 angle is to make it out of 4130 sheet by way of a 90 ton bending brake courtesy of the local metal shop. Does anyone know if this is an acceptable practice? Should the metal be normalized after this operation? Would I be better off to weld up some angle from two pieces of flat 4130 and then normalize it? Thoughts appreciated. Quote --Scott LongEZ #159 Finishing & Engine install Blogged at: http://www.briansplane.com Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.