Perry Mick wrote:

Ducted fan fans:

I flight tested my new duct yesterday.  You can read about it
at:

http://www.mickaircraft.com/

Be sure to read the Raspet letter.

here are some interesting quotes from the letter:

"The duct was performing the function of a Propeller
Speed Reduction Unit (PSRU) by reducing the propeller
tip speed and also increasing the propulsive efficiency
by affecting a larger cylinder of air."

and

"The duct system was then performing the function of
a variable-pitch propeller with no moving parts.


Perry J. Mick
Mick Duckt N7XR
http://www.ductedfan.com

Perry, I had to edit the URL as it would not load.
The one shown above loads. 

BTW You sure do have a lot of perseverance and optimism :-)
 
Paul Lamar
 
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