Correct me if I am wrong but with Butch's LAEV prop the motor uses juice
only when the position is changed right? I am interested in the new
AeroComposites' C/S prop. Pricey but light and extremely well made. They
only make electric drives for their military contracts unfortunately. I
would have to modify their hub to adapt a electric motor and worm drive
gear.
Doug in Japan
The big advantage to the metal CS prop is the high efficiency. I have
yet to see a composite prop equal it.
Paul Lamar
RE> You should look at the whirlwind props.
RE>
http://www.whirlwindpropellers.com/
RE> Marc Wiese
RE> Some of the guys racing tried them. Still not as good as metal.
RE> Hard to beat the big bucks that Hartzel and McCauley put into R & D.
RE> It would be best if some of the carbon fiber guys
RE> copied exactly the the metal prop plan form, airfoil and twist.
RE> Paul Lamar
What have you-all heard about the AeroComposite Props? See:
http://www.aerocomposites.com
They claim significant anecdotal improvements over standard metal
props across the board.
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Best regards,
Steve Thomas
mailto:steve@stevet.net
SteveT.Net
805-569-0336 office & fax
# RV-8 takes second place in Sun 'N Fun Air Race (IO-360, 220 hp, Sam James Cowl, 220
mph speed) with a 2-bladed constant speed AeroComposites propeller!
# Lancair IVP takes first place in Air Venture Oshkosh race. Kitty Hawk to Dayton
with max TAS of 360 mph @ 22,000 ft.. Average ground speed was 298 mph (flying west,
includes the time for climb to altitude).
First time I have heard decent race results.
I will have to take a closer look at one when I get to Sun & Fun this year.
Tracy Crook went 217 MPH with a fixed pitch wood prop in the Sun 100
in his RV4. Of course an RV8 is bigger. Tracy Saylor has gone 238 MPH
in the Sun 100 with a metal constant speed prop in his O-360 powered RV6.
I am not that impressed yet. :)
Paul Lamar
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