Originally Posted by
Brian W May
In the RAF Hercules K simulator, we used to give an exercise that pitchlocked the prop at rotate.
It's not "uncontrollable", but does have to be handled correctly . . .
Pitch-locked prop at rotation wouldn't be a that big a deal. A prop malfunction with pitchlock is preferable to the same malfunction without pitchlock. Pitchlock prevents a uncontrolled overspeed and buys you time to get stabilized in the climb at a safe altitude before having to screw around with it. RPM will increase with airspeed, but that can be controlled with throttle reductions. There shouldn't be any aircraft controllability issues unless there's something else going on.