T/R Drift
As an FI, I've always found it simpler to explain a basic principle of engineering physics ... that it isn't possible to offset a couple (torque) with a force (T/R) without a residual force. This residual force drifts the whole assembly parallel to and in the direction of the T/R component ... T/R drift. To correct the T/R drift the designer simply tilts the mast which causes the 'one skid low' attitude. Safe flying to all. Dennis K.