So I decided to make a quick wing using a foamy glider, gear motor and a parallel gear pass. There are regularly spaced plain bearings made of PVC, and the curved spars are 3/16" aluminum running through those guides. In this case the rods have to straighten out as the wing can't bend in its plane. You can hear the gear motor labor cyclically, though it's really storing torque and getting that energy back every half rotation. My planned composite lattice wing construction is lightyears ahead of this, but I'm still making illustrative models.
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