"....just don't attempt a passenger change while the rotors are turning."
Sounds a little like the Helicycle. In the earlier model, the rotor was engaged by the pilot standing outside the craft. One hand was on the collective and the other was on an engagement lever located behind the cabin. He said that when walking around the craft, always have the knuckles of one hand dragging on the ground.
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Remainder of post removed and relocated on a new thread ~ Turbine Helicycle.