O. K. guys, I'm not a pilot and I'm no expert on aerodynamics. I do know some general physics. Gyroscopic precision happens to any spinning disc all the time and has nothing to do with airflow or angle of attack. It is present in flywheels, automobile wheels, pump impellers and any other round spinning object. Its also why some instruments seem to need frequent adjustment. Its a matter of disc diameter and mass. Considering the mass of the prop as compared to the mass of the rest of the vehicle it is probably a very weak force, easily corrected for. Probably only matters in very extreme movments. It would seem to me to be irrelevent to P-factor except as the forces add to or subtract from each other. just a pssing thought...not to be taken for more than its worth...