Have a SIG LT-40 that has sheered off the inboard CA hinges two times now. Not sure why this is happening. I guess I'm going to replace them with hinge points by Robart since I don't have much wood left. I have many questions:
1. What size hinge points should I use?
2. Obviously I have a Manufacturing Problem, What could it be? The hinges didn't bind, the gap was not sealed, I didn't notice any flutter, but not sure I could recognize it.
3. How can I fix this design problem? Are the hinge points more robust?
4. I did notice that at full elevator motion I have a little torque in the stabilizer could there be a slight alignment problem? I would think the outside would shear off first if this is the problem.
5. Also is there a potential for overspeeding the aircraft such as powering though a loop instead of letting off power at the top of the loop? I'm just a beginner and not doing too much to the airframe.
6. Not much slop in the control surface from what I can tell, so don't think that is a problem.
7. The design has a fairly long distance from the last support to the horn, potential issue?
Any inputs would help. Thanks