nchrome

I plan on building a 1/4 scale Taub and would like to try to build in a wing warping system for the alerions. Could anybody give me some ideas on how I would be able to do this with high tourque servos. I do know that you would use a mast and cables. but I just don't know just how to go about it for scale appearance.

LesUyeda

I don't know who to give credit, but someone posted this some time ago.

Les

pimmnz

The drawing is generic, you can fit the idea to any monoplane with warping. What it doesn't show is that you must also have, along with the 'flexible' rear spar (often hinged at the fuselage) is ribs that are not rigidly attached to the spar, and fabric stitched, but not shrunk, to the ribs and trailing edge. Any tight fabric will nullify the effect you are tying to achieve and no servo will have the power to overcome the result. It is likely that you should arrange to have much more 'up trailing edge' warp than down, as the adverse yaw effects of twisting the whole wing can be huge, and will result in the airplane turning the opposite way to the applied control.
Evan.