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December 21 2003 - Unlimited Racer
Aft Propeller - Unducted 4' Diameter Fan

A four-foot fan. Must be because they just can't turn up that ridiculous
piston contraption powerplant. Mine is 38" or 3.17 foot.
Although if you are trying to run unducted a little more diameter would
probably be good.

Perry

I have to chime in here.....On the surface, it would appear that if we

could possibly come up with an efficient unducted fan prop for the rotary
engine, and eliminate PSRU's, well....sign me up for one.   Paul Conner

Getting rid of the PSRU is the ONLY reason I'm doing what I'm doing
Paul. However, I'm running the engine at 5500 which is probably about
the MINIMUM RPM you would want to run a rotary. With the new engines
hitting 10,000 RPM, I just can't see an unducted fan working on a rotary.
For a direct drive rotary, either standard 2500 RPM or unducted fan 4000
RPM, we need a SCALED UP Mazda with a higher displacement turning lower
RPM.
If I could get some NASA money to develop these things I would do it.
Beyond my means otherwise.

Perry
http://www.ductedfan.com

I have just the rotary for direct drive.

Paul Lamar
 
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