Performance Series Ultimate Biplane 3D 1.60 ARF (GPMA1307)
Tech Note

June 18, 2008

Servos with a minimum torque rating of 98 oz-in must be used for all of the control surfaces of this plane (ailerons, elevators, rudder). However, there is an additional recommendation for the servos which is that they should have metal gears.

Great Planes Model Manufacturing