MGL AP pitch servo pushrod geometry
MGL don't give specific instructions on the mechanical mounting of their AP servos (just the location of the mounting holes on the body) so I followed the Trutrak documentation for inspiration, as their servo motor appears to be physically identical to the MGL (and Dynon). I made a mount for the pitch servo that follows their pattern and I am happy with it. Now I am moving on to the pushrod.
Trutrak say to drill the bell crank 2.5 inches from the pivot in order to mount the pushrod. The arm on the servo however is only 1.5" from pivot to mounting hole. Surely, this introduces an element of gearing so that x degrees of rotation at the servo will give something other than x degrees rotation at the bell crank.
Does this even matter? Would I not be better having the same radius from pivot to pushrod mount at both ends?
RV9 TU. O-320-E2D. Engine hung, working on cowl, Dublin, Ireland
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