27% Extra 330S 3D ARF (GPMA1413)
Tech Note

June 17, 2008

As noted in the instruction manual, 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