In article , Ron Natalie says...

Denny wrote:
Why wouldn't it auto rotate?... The blades are no different than a
gyrocopter's fixed blades and they autorotate...
I can confidently predict that like Moeller's Skycar they will still be
pitching it to "investors" for years to come... PT Barnum was a
genius..

There's no clutch on the blades to allow them to free spin in case
of the engine loss of power.

Right you need a clutch to disengage the engine and the ability to change pitch
elstwise your in a heap of do do :-)

Chuck S