![]() The process begins with the use a program on the internet to generate a paper pattern. Each tube is a little milestone in the project. Fitting the tubes in place has turned out to be fun. 049 diagonal which makes it even stronger. A lot of guys have died in Cub wrecks with two broken legs when the lower firewall buckled in on their legs.Ī PA-12 and 14 have the diagonal tub running from the upper longeron at the door post down to the lower firewall tube, just opposite of the PA-18 fuselage. 049 as well) to give better crash worthiness in this area. 049 for this tube and "X" brace the diagonal tube (maybe make them. ![]() The next time I do a PA-18 I am going to step up to. I can see the one for the long section, but the slight change in longeron angle from the gear cluster to the firewall / engine mount should not have needed a break and splice. Tell you the truth, I've never understood why Piper made this splice to begin with. 120 will work just fine for the intended use, just a little over kill. 095) would be more like the factory used but. If you can find it, some thinner wall stuff (.063. They would be plenty stout but a little on the heavy side.
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