Return-Path: Received: from fed1mtao08.cox.net ([68.6.19.123] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2946267 for flyrotary@lancaironline.net; Fri, 23 Jan 2004 21:12:25 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao08.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040124021223.JECF11788.fed1mtao08.cox.net@BigAl> for ; Fri, 23 Jan 2004 21:12:23 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Torsionals Date: Fri, 23 Jan 2004 18:12:26 -0800 Message-ID: <002e01c3e21f$831d87c0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002F_01C3E1DC.74FA47C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 x-mimeole: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_002F_01C3E1DC.74FA47C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit If the two rotor is similar to a 4 cylinder 4 stroke piston engine, wouldn't a one rotor be similar to a 2 cylinder 4 stroke engine? Lamar has published the plots many times showing no torque reversals for a two rotor but very strong torque reversals for a one rotor. I don't believe that a torque reversal at the output shaft is a necessary condition for a resonant torsional vibration to get started. Al ------=_NextPart_000_002F_01C3E1DC.74FA47C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

If the two rotor is similar to a 4 cylinder 4 = stroke piston engine, wouldn't a one rotor be similar to a 2 cylinder 4 stroke = engine? Lamar has published the plots many times showing no torque reversals for = a two rotor but very strong torque reversals for a one rotor.

I don’t believe that a = torque reversal at the output shaft is a necessary condition for a resonant = torsional vibration to get started.

 

Al

 
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