ORIGINAL: Capt Jim
..... but I seem to run into difficulties such as....the seemingly good gyro/servo combination doesn't like 6 volts on the digital servo.....and...the super fast servo that comes with the Futaba gyro is a wimpy thing, not at all up to the task of holding a giant scale rudder. It is this sort of dead end street that makes me think that the gyros are for light heli's only, and they aren't there yet with the muscle required for larger aircraft. I'm hoping to learn that such is not the case.
Jim, I'm not using a special servo at all, my Hog has Futaba 3004s all around. My GYA350 didn't come with a servo. The recommended coreless unit is expensive (to me) and doesn't have great speed or torque specs. As far as I can tell you can use just about any servo with the gyro. The only restriction would seem to be voltage; it appears that all Futaba units are designed for 4.8 volt systems. The gyro is just sending a signal, like a receiver does, so it doesn't care what kind of servo is on the end of the wire.