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Interesting approaches to cockpit cage construction?

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cluttonfred

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In the Simple pusher pseudo-jet thread, I described what is basically a pod-and-boom pusher design disguised to look like a generic jet trainer. I had in mind a welded 4130 steel tube, bolted aluminum tube, or riveted aluminum tube and gusset cockpit cage at the center of the design, everything else (wings, boom, landing gear, engine mount, seats, harnesses) attaches to that. A large prewelded cockpit cage is, however, an awkward and expensive thing to ship in a kit.

Does anyone have any good examples of prewelded or otherwise preformed lightweight steel or aluminum structures (doesn't have to be a kit airplane) shipped in flat subassemblies that are then bolted or riveted together for final assembly? I also wonder if there might be some interesting approaches with CNC-cut flat sheet components that could be bent and welded together to create truss structures faster and cheaper than traditional welded tubing.

Any ideas?

Cheers,

Matthew
 
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