X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1695946 for flyrotary@lancaironline.net; Wed, 20 Dec 2006 17:28:26 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-100-190.carolina.res.rr.com [24.74.100.190]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id kBKMRPvk010942 for ; Wed, 20 Dec 2006 17:27:26 -0500 (EST) Message-ID: <000b01c72486$07120eb0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Radical Prop Was C/S Date: Wed, 20 Dec 2006 17:27:26 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C7245C.1DE16390" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C7245C.1DE16390 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 -----=20 From: wrjjrs@aol.com=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 20, 2006 5:16 PM Subject: [FlyRotary] Re: Radical Prop Was C/S Ed,=20 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 =20 -----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. http://www.avweb.com/eletter/archives/avflash/291-full.html 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. =20 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 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html -------------------------------------------------------------------------= ----- Check out the new AOL. Most comprehensive set of free safety and = security tools, free access to millions of high-quality videos from = across the web, free AOL Mail and more. ------=_NextPart_000_0008_01C7245C.1DE16390 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
All too true, Bill.   I had = heard that=20 CATO was in discussion with Paul to build such props, but don't know if = that=20 came together or not.  Probably should send Paul an e mail (if I = can find=20 his) and ask him if he things his prop would be effective for a slower = plane=20 line a 200 MPH RV-6A.
Then I would have an idea if it would = be worth=20 while to try.  I'd want a 10 MPH increase for it to be worth my = while -=20 heck, I don't fly at top speed in any case, so really wouldn't be much = point for=20 me to get one {:>).  Now, if it would add 1000 fpm to rate of = climb then=20 that's a different matter.
 
Ed
 
----- Original Message -----
From:=20 wrjjrs@aol.com
Sent: Wednesday, December 20, = 2006 5:16=20 PM
Subject: [FlyRotary] Re: = Radical Prop Was=20 C/S

Ed,
I have followed Paul Lipps prop design efforts. Very interesting = indeed.=20 There must be some improvement in efficiency since the birds flying = them are=20 usually near or at the front of the pack. Looking for improvement is = admarible=20 Ed, The problem is often you must just build it yourself. Paul's = efforts, at=20 first at least, were the design program only. He would give = you the=20 numbers for the speed and HP you had and then you had to fabricate the = prop=20 yourself! I don't know if he is supplying a finished product yet or = not.
Bill Jepson
 
 
-----Original Message-----
From:=20 eanderson@carolina.rr.com
To: flyrotary@lancaironline.net
Sent: = Wed, 20=20 Dec 2006 10:29 AM
Subject: [FlyRotary] Radical Prop Was C/S

 
Look under heading BiPlanes in the below URL =  and=20 there a pilot reports a 20 mph increase using the radical Lipps = propeller over=20 a more conventional prop - again, my point is better ways may be more = a matter=20 of looking at fresh ideas about props and controllers rather than = accepting=20 what has been.
 
http://www.avweb.com/eletter/archives/avflash/291-full.ht= ml
 
I believe this prop is optimized for high = speed flight, and while I am certain I don't fully understand the = total=20 reason why, part of the reason it is faster appears to be that it can = develop=20 thrust right down the hub if the airspeed (prop advance?) is high=20 enough.  Also the developer takes issue with the standard "broad" = tips on=20 props. etc. 
 
 
However, it may not provide the same amount of = increase=20 over my current prop due to the slower airspeeds I flight - but hey, = even 10=20 MPH increase would be interesting.
 
FWIW
 
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW=
http://www.dmack.net/mazda/index.html
Check out the new AOL. Most comprehensive = set of free=20 safety and security tools, free access to millions of high-quality = videos from=20 across the web, free AOL Mail and = more.
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