X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail16.syd.optusnet.com.au ([211.29.132.197] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTPS id 689581 for flyrotary@lancaironline.net; Thu, 01 Sep 2005 18:09:31 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.197; envelope-from=lendich@optusnet.com.au Received: from george (d58-104-232-31.dsl.nsw.optusnet.com.au [58.104.232.31]) by mail16.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j81M8fAo019019 for ; Fri, 2 Sep 2005 08:08:43 +1000 Message-ID: <002901c5af41$f8f0c1b0$1fe8683a@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Rational for TES "O" Rings Date: Fri, 2 Sep 2005 08:10:32 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01C5AF95.CA072160" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0026_01C5AF95.CA072160 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Rational for TES "O" RingsDavid, Right-on, couldn't have said it better myself. George ( down under) ----- Original Message -----=20 From: David Carter=20 To: Rotary motors in aircraft=20 Sent: Friday, September 02, 2005 4:34 AM Subject: [FlyRotary] Re: Rational for TES "O" Rings About "the o-rings raising the oil temp" - I've seen more than one = post asking about that. The way I read that is, "The TES o-rings can = tolerate higher oil [or rotor or housing] temperatures" - not that they = "raise the oil temperature". I frequently "open mouth and insert foot" = in these forums, not quite getting the sense of some of the = conversations. Just trying to be helpful - sometimes my "helpfulness = urge" exceeds my "intelligence or understanding". Sorry if I've missed = the point. David ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 01, 2005 9:25 AM Subject: [FlyRotary] Re: Rational for TES "O" Rings =20 =20 =20 I don't know how you figure the TES seals could raise the temp but = I am concerned at how stiff they are and in the application of the = rotors I think the seals need to be softer and more flexible but that's = just an eyeball engineers point of view, the Viton seals have worked = just fine for me and in my early days of sorting things out I was = running very high oil temps and still had no problems with the O-rings, = if it works I don't fix it. I am however using the TES O-rings in the rotor housing and like them = and will stick with them but this is an application where I don't think = they need to be flexible as with the rotors but then again I am just an = eyeball engineer. Ken Welter =20 Ken, 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. =20 Mark S. ------=_NextPart_000_0026_01C5AF95.CA072160 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: = [FlyRotary] Rational for TES "O" Rings
David,
Right-on, couldn't have said it better=20 myself.
George ( down under)
----- Original Message -----
From:=20 David=20 Carter
Sent: Friday, September 02, = 2005 4:34=20 AM
Subject: [FlyRotary] Re: = Rational for TES=20 "O" Rings

About "the o-rings raising the oil = temp"  -=20 I've seen more than one post asking about that.  The way I read = that is,=20 "The TES o-rings can tolerate higher oil [or rotor or housing] = temperatures" -=20 not that they "raise the oil temperature".  I frequently "open = mouth and=20 insert foot" in these forums, not quite getting the sense of some of = the=20 conversations.  Just trying to be helpful - sometimes my = "helpfulness=20 urge" exceeds my "intelligence or understanding".  Sorry if I've = missed=20 the point.
 
David
 
----- Original Message -----=20
From: Mark R Steitle =
Sent: Thursday, September 01, 2005 9:25 AM
Subject: [FlyRotary] Re: Rational for TES "O" = Rings

 

 

 

   I don't know how you figure the TES seals could = raise the=20 temp but I am concerned at how stiff they are and in the application = of the=20 rotors I think the seals need to be softer and more flexible but = that's just=20 an eyeball engineers point of view, the Viton seals have worked just = fine for=20 me and in my early days of sorting things out I was running very high = oil=20 temps and still had no problems with the O-rings, if it works I don't = fix=20 it.

 I am however using the = TES O-rings=20 in the rotor housing and like them and will stick with them but this = is an=20 application where I don't think they need to be flexible as with the = rotors=20 but then again I am just an eyeball=20 engineer.

  Ken=20 Welter

 

Ken,

When = rebuilding my=20 20B, I used TES o-rings on both water and oil.  I have a little = over 9=20 hours of light running (ground runs only) on the engine with no = apparent=20 problems.  The one thing I think we need to realize with the oil = o-rings=20 is their proximity to the very hot rotor surfaces.  Lynn has = stated that=20 under heavy loads the rotors can get to 450* or higher.  Since = the oil=20 o-rings are in the sides of the rotors, very near the hottest part of = the=20 rotors, I suspect they could easily see temps higher than what we=92re = reading=20 on the oil temp gauge.  I don=92t recall seeing any temp figures = that have=20 actually been measured for the oil o-rings.  I don=92t know how = we could=20 measure that, but if we had that information it could answer the = question of=20 whether or not TES oil o-rings are needed there.  I figured it = was cheap=20 insurance, so I used the TES o-rings for both the oil and water=20 locations.

 

Mark=20 S.

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