X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [206.46.252.46] (HELO vms046pub.verizon.net) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 912764 for flyrotary@lancaironline.net; Sat, 23 Apr 2005 23:32:55 -0400 Received: from verizon.net ([71.99.158.246]) by vms046.mailsrvcs.net (Sun Java System Messaging Server 6.2 HotFix 0.04 (built Dec 24 2004)) with ESMTPA id <0IFF005DBLUVNY73@vms046.mailsrvcs.net> for flyrotary@lancaironline.net; Sat, 23 Apr 2005 22:32:56 -0500 (CDT) Date: Sat, 23 Apr 2005 23:32:54 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Re: rotor and seal wear was Re: All Parts have arrived, Whew! In-reply-to: To: Rotary motors in aircraft Message-id: <426B1366.4060706@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary=------------050105010807010406050107 X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) This is a multi-part message in MIME format. --------------050105010807010406050107 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Yep, that's why I asked about gear and bearing clearances. Finn Wendell Voto wrote: > FWIW, looks to me that the distance from the rotor to the housing > causes more or less bending force on the seals. If the distance is > large, then more side force is exerted on the seal and stressing it to > the breaking point. Since Tracy has a high time engine - so far with > no seal problem and is not babying his engine, could this be the > reason some are getting more seal side wear than others? How can the > rotor to housing gap be accurately measured? How much does it change > with temperature? > Wendell! --------------050105010807010406050107 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Yep, that's why I asked about gear and bearing clearances.

Finn

Wendell Voto wrote:
Message
FWIW, looks to me that the distance from the rotor to the housing causes more or less bending force on the seals.  If the distance is large, then more side force is exerted on the seal and stressing it to the breaking point. Since Tracy has a high time engine - so far with no seal problem and is not babying his engine, could this be the reason some are getting more seal side wear than others?  How can the rotor to housing gap be accurately measured? How much does it change with temperature?
Wendell!
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