|
All too true, Bill. I had heard that
CATO was in discussion with Paul to build such props, but don't know if that
came together or not. Probably should send Paul an e mail (if I can find
his) and ask him if he things his prop would be effective for a slower plane
line a 200 MPH RV-6A.
Then I would have an idea if it would be worth
while to try. I'd want a 10 MPH increase for it to be worth my while -
heck, I don't fly at top speed in any case, so really wouldn't be much point for
me to get one {:>). Now, if it would add 1000 fpm to rate of climb then
that's a different matter.
Ed
----- 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
|