BTW:
The prop shaft torque is easily calculated by the mechanical formula:
SHP = Prop RPM x Q (torque in lb-ft) / (33000 / 6.28...)
OR
Q (torque in lb-ft) = 5252 x SHP / Prop RPM
I suppose one could try to calculate the yawing torque, but it varies with airspeed etc. and thus is trimmed out empirically with either fin offset or rudder tab.
Last edited by barit1; 26th September 2008 at 03:26.