X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 690049 for flyrotary@lancaironline.net; Fri, 02 Sep 2005 01:54:17 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from 204.127.135.75 ([204.127.135.75]) by worldnet.att.net (mtiwmhc13) with SMTP id <2005090205533211300n2393e>; Fri, 2 Sep 2005 05:53:32 +0000 Received: from [209.247.222.94] by 204.127.135.75; Fri, 02 Sep 2005 05:53:31 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Rational for TES "O" Rings Date: Fri, 02 Sep 2005 05:53:31 +0000 Message-Id: <090220050553.14441.4317E8DB0007E467000038692160466648019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_14441_1125640411_0" --NextPart_Webmail_9m3u9jl4l_14441_1125640411_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Mark, Glad you spoke up !! I had forgotton that you had installed TES seals in your engine.........Chuck Dunlap is currently flying with TES rotor seal and you will be in the near future hopefully.........Are others lurking out there that are flying TES O-rings, have them installed or are considering them ?? How about a show of hands !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Mark R Steitle" : -------------- When rebuilding my 20B, I used TES o-rings on both water and oil. I have a little over 9 hours of light running (ground runs only) on the engine with no apparent problems. The one thing I think we need to realize with the oil o-rings is their proximity to the very hot rotor surfaces. Lynn has stated that under heavy loads the rotors can get to 450* or higher. Since the oil o-rings are in the sides of the rotors, very near the hottest part of the rotors, I suspect they could easily see temps higher than what we’re reading on the oil temp gauge. I don’t recall seeing any temp figures that have actually been measured for the oil o-rings. I don’t know how we could measure that, but if we had that information it could answer the question of whether or not TES oil o-rings are needed there. I figured it was cheap insurance, so I used the TES o-rings for both the oil and water locations. Mark S. --NextPart_Webmail_9m3u9jl4l_14441_1125640411_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Mark,

Glad you spoke up !! I had forgotton that you had installed TES seals in

your engine.........Chuck Dunlap is currently flying with TES rotor seal and

you will be in the near future hopefully.........Are others lurking out there

that are flying TES O-rings, have them installed or are considering them ??

How about a show of hands !!

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "Mark R Steitle" <mark.steitle@austin.utexas.edu>: --------------

When rebuilding my 20B, I used TES o-rings on both water and oil. I have a little over 9 hours of light running (ground runs only) on the engine with no apparent problems. The one thing I think we need to realize with the oil o-rings is their proximity to the very hot rotor surfaces. Lynn has stated that under heavy loads the rotors can get to 450* or higher. Since the oil o-rings are in the sides of the rotors, very near the hottest part of the rotors, I suspect they could easily see temps higher than what we’re reading on the oil temp gauge. I don’t recall seeing any temp figures that have actually been measured for the oil o-rings. I don’t know how we could measure that, but if we had that information it could answer the question of whether or not TES oil o-rings are needed there. I figured it was cheap insurance, so I used the TES o-rings for both the oil and water locations.

Mark S.

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