On Sep 5, 1:10*am, Leviterande Leviterande.
wrote:
Hi all!
Volf propeller hehttp://www.rexresearch.com/volfprop/volfprop.htm

I have been thinking alot about how this propeller would do, I wish I
had a workshop, CNC, and tools to build one.. this amazing prop is
claimed to be *super quiet and efficient.. so any more info from the
article on it or any *word of experience in propellers are very
appreciated


Looks like a ducted fan to me. Judging from the pictures, it's
doubtful CFD existed when the patent was approved and modern rotor
design would probably be more efficient. Technology progresses, ya
know?