X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [207.189.223.49] (HELO email3.peakpeak.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 936291 for flyrotary@lancaironline.net; Sun, 08 May 2005 00:45:51 -0400 Received-SPF: none receiver=logan.com; client-ip=207.189.223.49; envelope-from=billdube@killacycle.com Received: (qmail 4925 invoked by uid 513); 8 May 2005 05:38:06 -0000 Received: from 207.189.221.184 by email3 (envelope-from , uid 504) with qmail-scanner-1.23 (clamscan: 0.83 Clear:RC:1(207.189.221.184):. Processed in 0.362797 secs); 08 May 2005 05:38:06 -0000 Received: from 184-221-189-207.dyn.peakpeak.com (HELO tigger.killacycle.com) ([207.189.221.184]) (envelope-sender ) by email3.peakpeak.com (qmail-ldap-1.03) with SMTP for ; 8 May 2005 05:38:05 -0000 Message-Id: <4.3.1.0.20050507223448.047438e8@mail.chisp.net> X-Sender: billdube@mail.chisp.net X-Mailer: QUALCOMM Windows Eudora Version 4.3.1 Date: Sat, 07 May 2005 22:42:53 -0600 To: "Rotary motors in aircraft" From: "BillDube@killacycle.com" Subject: Re: [FlyRotary] Re: Seal Hrdness In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed At 11:17 AM 5/6/2005, you wrote: >Bill, not certain I am following your thought. Are you indicating that my >seals became very hot as a result of the malfunction? - please elaborate. If your seals became cocked and jammed against the housing walls, the friction might get them very hot. Perhaps red hot. If they got very hot then it is possible that the hardness was reduced by this heat cycle. My point is that unless you do a hardness test on a seal (or a portion of a seal) that you are certain never became overheated, you can't be sure if the lack of hardness was the cause, or the result, of the engine failure. >If they did I presume you are saying that they might have had their >hardness reduced by the extreme heat? Just the failed rotor seals or both? If the undamaged seals in the other (undamaged) rotor are soft, you have found the cause of the failure. If they are all hard on the undamaged rotor, you still are not 100% sure if one or more of the seals on the failed rotor were soft, but it is less likely. Bill Dube http://www.killacycle.com/Lights.htm