----- Original Message -----
Sent: Wednesday, December 20, 2006 5:16
PM
Subject: [FlyRotary] Re: Radical Prop
Was C/S
Ed,
I have followed Paul Lipps prop design efforts. Very interesting
indeed. There must be some improvement in efficiency since the birds flying
them are usually near or at the front of the pack. Looking for improvement
is admarible Ed, The problem is often you must just build it yourself.
Paul's efforts, at first at least, were the design program only.
He would give you the numbers for the speed and HP you had and then you had
to fabricate the prop yourself! I don't know if he is supplying a finished
product yet or not.
Bill Jepson
-----Original Message-----
From:
eanderson@carolina.rr.com
To: flyrotary@lancaironline.net
Sent: Wed,
20 Dec 2006 10:29 AM
Subject: [FlyRotary] Radical Prop Was C/S
Look under heading BiPlanes in the below URL and
there a pilot reports a 20 mph increase using the radical Lipps propeller
over a more conventional prop - again, my point is better ways may be more a
matter of looking at fresh ideas about props and controllers rather than
accepting what has been.
I believe this prop is optimized for high
speed flight, and while I am certain I don't fully understand the total
reason why, part of the reason it is faster appears to be that it can
develop thrust right down the hub if the airspeed (prop advance?) is high
enough. Also the developer takes issue with the standard "broad" tips
on props. etc.
However, it may not provide the same amount of
increase over my current prop due to the slower airspeeds I flight - but
hey, even 10 MPH increase would be interesting.
FWIW