I'm familiar with the angle of twist formula- theta = TL/JG, and I have a reference for a design that uses torque tube actuated ailerons (Tailwind). I'm playing with designing a Four Runner/Tailwind/Bearhawk hybrid and torque tube ailerons sure would simplify things. My design has a gross of 2600 lbs and a VNE of around 200 kts. I have plenty of room in the wing for a large torque tube but obviously want to minimize excess. How would you decide how much twist is too much for a given torque? Obviously stiffness is the name of the game for flutter resistance. Initially I'm thinking I could design my torque tube to flex approx the same amount as a Tailwind torque tube for a given load plus some fudge factor. Thoughts?
