RE: what kind of craft is this???
Four eccentric cams , one located on each of the blades controlled individual blade pitch.
At the top of the are the blades were positioned with positive pitch Producing lift , zero pitch
was set on the side , and negative pitch on the bottom.
The engines rpm controlled the rate of climb and descent.
The first time they attempted to fly the model it did not produce enough lift , so the cams where
redesigned .
On the second attempt the aircraft did hover.
Later models have achieved forward flight by adjusting each cam independently or by using
an additional engine for the forward thrust .
Tony this is all the info I have considering this craft , its from the AMA Museum.
As far I know there is no info on the web over this flying thing .
,Jules