X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.203] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 929391 for flyrotary@lancaironline.net; Tue, 17 Jan 2006 00:23:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.203; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 37so1314048wra for ; Mon, 16 Jan 2006 21:22:16 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:in-reply-to:x-mimeole:importance; b=Uw+CoBvJ5RRv7PCK7yL8i+cPyGH/rt//VUBtP5xiPo0VX0KnLU1fBx2z2tjCn5OLtHEi8sIGCOA5AiHdoHuasCaA9j3zpshO25dComDR/Bb8uf7jlftd7Llq0xhynJ+eQYcP70UY1KpLldrogLFiTgqY9EiCCwKNOQmBBiPe8FY= Received: by 10.54.128.13 with SMTP id a13mr5197640wrd; Mon, 16 Jan 2006 21:22:16 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 43sm6426524wri.2006.01.16.21.22.15; Mon, 16 Jan 2006 21:22:15 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: shake, rattle and hum Date: Mon, 16 Jan 2006 23:22:16 -0600 Message-ID: <017101c61b25$fb000420$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0172_01C61AF3.B0659420" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0172_01C61AF3.B0659420 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit You might go on to something with the Warpdrive prop issue. There were several cases of VW cranks being sheared off while running Warpdrives & the 'internet wisdom' was that the carbon blades were so stiff that the torque reversals from the VW (like a mini-Lyc) were killing the shaft because the prop wouldn't absorb the pulses. (The reality was probably that they had just the *wrong* resonant freq & were stronger than the crank.) At any rate, Warps became verboten on direct drive VW's. Hi Charlie, I hadn't heard of this, but it's pretty interesting. I've got the Warp Drive prop off now, and need to cut the IVO off about 2 inches before I install it. I can absolutely guarantee that it will be better, worse, or the same :-) Rusty ------=_NextPart_000_0172_01C61AF3.B0659420 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

You might go on to something with the Warpdrive prop = issue.=20 There were
several cases of VW cranks being sheared off while running = Warpdrives &
the 'internet wisdom' was that the carbon blades = were so=20 stiff that the
torque reversals from the VW (like a mini-Lyc) were = killing=20 the shaft
because the prop wouldn't absorb the pulses. (The reality = was=20 probably
that they had just the *wrong* resonant freq & were = stronger=20 than the
crank.)

At any rate, Warps became verboten on direct = drive=20 VW's.

 
Hi=20 Charlie,
 
I hadn't = heard of this,=20 but it's pretty interesting.  I've got the Warp Drive prop off now, = and=20 need to cut the IVO off about 2 inches before I install it.  I can=20 absolutely guarantee that it will be better, worse, or the same=20 :-)
 
Rusty
 




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