Aileron servos keep stripping.

[monkeyboy]

Darn it another stripped servo.
Ive been using the hs-55 servos.

Plane was acting funny again in the air today.
landed her and discovered I had stripped the gears on yet another servo.
I was just going to upgrade the servos.

But before I do I need to find out if something is wrong with my setup.

Anything I can look at for the culprit?
Radio setup maybe.

I have no binding of the control surface. could too long of a servo horn give airflow over the surface to much leverage?

[mrmugen]

The best odds is that long servo arm. The farther you get away from the center of the servo the more leverage it has.....I am sure you know this. Also it has much less in/oz of torque the farther you get out. I would try to run a shorter arm or just move to an inner hole of the same arm you have. Then if you need more throw go ahead and move the linkage down on the control surface horn. This will give you better torque out of your servo and less stress on the drivetrain. Any chance the holes are sloppy in either the control horn or servo horn? Slop will cause problems also.

Kevin

[flydiver]

If it's not crashing then it's leverage. hs-55 actually have too much torque for the gear surface area. They are somewhat prone to this. You could try carbonites, SG90's, or even hs-81.

You DO know NOT to move the control surface (servo arm or control surface) by hand? The forces the gear train backwards with ALL the reverse force of the gear leverage. The first gear in the train is tiny and that's what usually strips.

If you ran your ailerons all the way to the wing end it's easy to catch a wing tip aileron on a bad landing and do this reverse shove on the gear train. That's one argument for not doing full strip ailerons.

fly