I need help to solve a problem I have on my big SU31 model (see photo).
I have installed D980TW servos, to move elevators; I use N°2 servos for each moving part with long horns for 3D aerobatics. The horns are 50mm long.
The elevator is aerodynamicaly and staticaly balanced.
Servos are connected to Powerbox unit using S-Bus system and are powered 7.4Volt.
The problem is: when I move servos to ZERO they can’ t reach the position and elevators start trembling conspicounsly. This is surely due to weight and dimensions of elevators.
I haven’ t this problem during flight, due to pressure on elevators.
What can I do to solve this trouble? Have I to change some parameters on servos using your Hitec programmer? Which parameters?