X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.197] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 929395 for flyrotary@lancaironline.net; Tue, 17 Jan 2006 00:08:50 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.197; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 37so1312463wra for ; Mon, 16 Jan 2006 21:08:04 -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=p9sOH0k8YZz6AGw868vNcUIC7IPTO3qUOg3xMhl3NtR+6KJHGJ9Dp3qB2QxEKB0A36gOe6/9IW6KACWkxdaz4mrinxmFP4n+HZ4dLsdRyIqu8FDWvirXhy7zgXOGUiwEncLRaW7xXiBHfsXHX08emGxTnOXWMa/NoFA1gmkaGv8= Received: by 10.54.132.10 with SMTP id f10mr9470166wrd; Mon, 16 Jan 2006 21:08:04 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id g3sm3251691wra.2006.01.16.21.08.03; Mon, 16 Jan 2006 21:08:04 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: shake, rattle and hum Date: Mon, 16 Jan 2006 23:08:04 -0600 Message-ID: <016a01c61b23$ff5d2ea0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_016B_01C61AF1.B4C2BEA0" 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_016B_01C61AF1.B4C2BEA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Just a thought, would changing the prop position in by one or two bolt = holes make a difference?=20 Georges B. Hi Georges, Thanks for the comments, but I don't believe it would make any = difference. Rotating the prop is a trick to try to get the prop imbalance, to cancel = out the engine imbalance. In this case, I don't think either is actually = out of balance, but rather there's a resonant vibration being caused by the = single rotor torque reversals. =20 Cheers, Rusty (never seen a "good" used rotor housing I'd call mint) =20 =20 ------=_NextPart_000_016B_01C61AF1.B4C2BEA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Just a thought, would changing the prop position in by = one or=20 two bolt holes make a difference?

Georges B.

Hi Georges,

Thanks for the comments, but I = don't believe=20 it would make any difference.  Rotating the prop is a trick to try = to get=20 the prop imbalance, to cancel out the engine imbalance.  In this = case, I=20 don't think either is actually out of balance, but rather there's a = resonant=20 vibration being caused by the single rotor torque reversals.  =

Cheers,

Rusty (never seen a "good" used = rotor housing=20 I'd call mint)

 

 

------=_NextPart_000_016B_01C61AF1.B4C2BEA0--