The Sky Pup, which is a well regarded (as far as I can tell) part 103 ultralight, uses fabric hinges on the tail surfaces. Very simple, and presumably very light. I forget whether they are the alternating under and over strips or the type with two strips sewn together so that, in cross section, you have an X. Then there's the old sewn hinges that the CL fliers used to use. I've used all three successfully on my RC models. For the first two methods, it might be a good idea to use a little reinforcement at the ends. There's a drawing showing the cross section in the Sky Pup newsletter, issue 8. machnone.com/news2.html
I can check the plans for a little more detail if you like.
There are no ailerons on tbe Sky Pup, but I suspect this hinge method could be easily adapted.
BTW, it's claimed that the Sky Pup was designed by engineers from Cessna. The main ingredients are wood, foam, and fabric, with a few small bits fabricated from 4130.
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It seems to me that it must be possible to make ailerons that are stiff in torsion but not in bending. I haven't figured out an elegant and simple solution for fore and aft bending, though. 3 pieces joined by pins seems like a total kluge.
The Sky Pup plans are thorough, and I'm sure you could learn a lot from them, if you have the budget. Not a metal airplane, though.
I can check the plans for a little more detail if you like.
There are no ailerons on tbe Sky Pup, but I suspect this hinge method could be easily adapted.
BTW, it's claimed that the Sky Pup was designed by engineers from Cessna. The main ingredients are wood, foam, and fabric, with a few small bits fabricated from 4130.
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It seems to me that it must be possible to make ailerons that are stiff in torsion but not in bending. I haven't figured out an elegant and simple solution for fore and aft bending, though. 3 pieces joined by pins seems like a total kluge.
The Sky Pup plans are thorough, and I'm sure you could learn a lot from them, if you have the budget. Not a metal airplane, though.