X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.201] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1036039 for flyrotary@lancaironline.net; Thu, 16 Mar 2006 09:11:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.201; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 69so321952wra for ; Thu, 16 Mar 2006 06:10:48 -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:x-mimeole:importance:in-reply-to; b=ge7VAaZzG6Rqmf1RvSRwV/wh4VCeVYnw+jBr4H/j0vVYaw3svOLEUlk1Dhfj1SZJtRTKMpYLqYHaZ4WtlVmgmQ04ENBIID+xZXSIr8Lkr4hx3/YMCvjVA8GmOxn0F0GAJSL/la75PfFduT5GKJ1GfKItCmmaWva8u0KADlJgu/U= Received: by 10.54.69.16 with SMTP id r16mr447254wra; Thu, 16 Mar 2006 06:10:47 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 65sm770849wra.2006.03.16.06.10.47; Thu, 16 Mar 2006 06:10:47 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Motor teardown results Date: Thu, 16 Mar 2006 08:10:47 -0600 Message-ID: <008b01c64903$6c77adf0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_008C_01C648D1.21DD3DF0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_008C_01C648D1.21DD3DF0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I now have Tracy's 2 piece apex seals and I wonder how they will = perform, it appears that the heavier weight of the 2 piece seals puts the resonant frequency in the cruising range of 6000RPM? =20 =20 Interesting report Chuck. I would think any sort of rotor bouncing = would be more of a spring problem than a seal problem. What springs are you = using for the apex seals? Were they new, proper amount of curvature, big and small spring for each seal? Just seems odd that no one else has been = seeing these chatter marks like you have. =20 =20 It will be interesting to see if your apex seal grooves are worn as Ed mentioned. Ed, was your housing full of chatter marks? =20 Cheers, Rusty=20 =20 =20 PS- Hoser from the urban dictionary for George (not translated into any dialect) http://www.urbandictionary.com/define.php?term=3Dhoser =20 =20 ------=_NextPart_000_008C_01C648D1.21DD3DF0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
I now = have Tracy's 2=20 piece apex seals and I wonder how they will perform, it appears that the = heavier=20 weight of the 2 piece seals puts the resonant frequency in the cruising = range of=20 6000RPM?
 
 
Interesting report Chuck.  I would think = any sort=20 of rotor bouncing would be more of a spring problem than a = seal=20 problem.   What springs are you using for the apex = seals? =20 Were they new, proper amount of curvature, big and small spring for = each=20 seal?  Just seems odd that no one else has been seeing these = chatter marks=20 like you have. 
 
It will be interesting to see if your apex = seal grooves=20 are worn as Ed mentioned.  Ed, was your housing full of chatter=20 marks?
 
Cheers,
Rusty
 
 
PS- Hoser from the urban dictionary for = George (not=20 translated into any dialect)
http://ww= w.urbandictionary.com/define.php?term=3Dhoser
 
 
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