Ken S. Tucker wrote:

I wonder if ram scoops were ever installed near the
prop tips. Probably too expensive for GA, but a WW2
A/C with tips spinning at what(?) 500-600 mph would
give a nice pressure boost.
I've read dual phase superchargers were used in recon
A/C to get the speed and altitude.
Ken


First off I doubt it overcome the drag it would create. Second, what do
you think the tip speed is on an average GA plane is?

Follow this link and learn a thing or two.

http://www.pponk.com/HTML%20PAGES/propcalc.html