coaxial rotor torque

[bernie007]

By changing the method of suppling power to a coaxial rotor system, I can generate from 0 to 125 ft/lbs of torque at the shaft, in either direction, for yaw control. On a copter weighing approx 1600lbs, is this sufficient, for a real world application?

 

[Intermesher]

This page may be of some help.

http://www.unicopter.com/B233.html