Scott Skylane wrote:
Prop blade pitch control... a motor in the spinner to adjust pitch,
controlled via Bluetooth. No hollow crankshafts and oil pressure
systems, no slip-rings.

Eh? How would the motor be powered, batteries? I'm not sure how long
reasonably sized batteries would work. And what about centrifugal force
issues?...

If I was totally serious about this, I wouldn't tell you... I'd go and
make a huge fortune. Or lose a small one.

How about this... mount some permanent magnets on the front of the cowl,
right behind the spinner. In the rear face of the spinner, embed some
coils. In effect, the spinner becomes a generator. This electricity is
used to run the motor inside the spinner that adjusts blade pitch.
Probably include a small battery to allow pitch adjustment when the
engine isn't running.

Feasible? Dunno. But if you use this idea to make a large fortune, could
you please just send me a small fortune? In advance?

Thanks

Frank