SP
Stuck High T/R Thrust
that's more or less right.
there's a transient effect and a steady state effect
there is a large increase in the yaw rate initially while the throttle is being reduced (transient), once a low RRPM is established the yaw rate then will decrease as the t/r will be less effective but the torque required by the rotor will be similar (or possibly slightly greater)(steady state).
one yardstick for a helicopter design is whether, at reduced RRPM, the t/r capacity to arrest yaw continues after the m/r ceases to be able to provide lift=weight (and in turn if that could continue after the engine ceases to be able to produce enough torque)
the order of those limiting factors is nice to know