X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 932962 for flyrotary@lancaironline.net; Wed, 04 May 2005 21:01:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050505010048.KAYI1994.imf16aec.mail.bellsouth.net@rd> for ; Wed, 4 May 2005 21:00:48 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: CVT (continuously variable transmission) Date: Wed, 4 May 2005 20:01:03 -0500 Message-ID: <04be01c5510d$e902d9b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_04BF_01C550E4.002CD1B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_04BF_01C550E4.002CD1B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Why would you want a CVT on an airplane? The interface between the prop = and the air is where you need to change things. Bill Schertz =20 It looks to me like it would serve as a PSRU, and constant speed prop at = the same time. =20 =20 As for the prop being what you want to change, I'm not so sure about = that. I think it just might be the only thing that we've ever had the ability = to change. With the diameter of the prop fixed, reducing the pitch mainly helps climb because it allows the engine to run at a higher, more = powerful rpm. The CVT would do that with your normal cruise prop. =20 =20 It's all probably a dream at this point, but something for future consideration. Perhaps an RD-1CVT? Heck, after seeing the unadvertised improvement in my latest EM-2, I half expect my latest RD-1C to be a CVT when it shows up in a day or so :-) =20 Rusty (wondering if John ever got his latest EC-2 for torture testing) =20 =20 ------=_NextPart_000_04BF_01C550E4.002CD1B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Why would you want a = CVT on an=20 airplane? The interface between the prop and the air is where you need = to change=20 things.
Bill Schertz
 
It looks to=20 me like it would serve as a PSRU, and constant speed prop at the = same=20 time. 
 
As for the=20 prop being what you want to change, I'm not so sure about that.  I = think it=20 just might be the only thing that we've ever had the ability to = change. =20 With the diameter of the prop fixed, reducing the pitch mainly helps = climb=20 because it allows the engine to run at a higher, more powerful = rpm.  The=20 CVT would do that with your normal cruise = prop.  
 
It's all=20 probably a dream at this point, but something for future = consideration. =20 Perhaps an RD-1CVT?  Heck, after seeing the unadvertised = improvement in my=20 latest EM-2, I half expect my latest RD-1C to be a CVT when it = shows=20 up in a day or so  :-)
 
Rusty=20 (wondering if John ever got his latest EC-2 for torture=20 testing)
 
  
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