X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTP id 687886 for flyrotary@lancaironline.net; Wed, 31 Aug 2005 10:46:33 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.64 ([204.127.135.64]) by worldnet.att.net (mtiwmhc12) with SMTP id <20050831144548112004shbae>; Wed, 31 Aug 2005 14:45:48 +0000 Received: from [209.247.222.87] by 204.127.135.64; Wed, 31 Aug 2005 14:45:46 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Rational for TES "O" Rings Date: Wed, 31 Aug 2005 14:45:46 +0000 Message-Id: <083120051445.13263.4315C29A000556D6000033CF2160280741019D9B040A05@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_13263_1125499546_0" --NextPart_Webmail_9m3u9jl4l_13263_1125499546_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Rusty and all, I am of the opinion (yet to be proven ) that the use of TES seals in the rotors may raise the critical temp for oil.......It is well known that the 13B is most efficient with oil temps in the 160 to 200 F range and that power suffers above these numbers........I do not advocate flying with oil temps above those numbers but most of us will struggle with oil temps as we sort out our oil cooling systems.........My hope is that the TES seals will provide a safety buffer for oil temp by preventing the rotor oil seals from going away with short periods of over temp during test flying......The same can be said for the inner coolent seal as well with the outer seal probably not a real problem (but they are less expensive than stock)........ FWIW -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from keltro@att.net (Kelly Troyer): -------------- Rusty, Chuck Dunlap is currently flying with TES O-rings supplied to him by Paul Lamar........ These are Creavey seals of the sizes determined by Paul L.......I failed to ask Chuck the flying hours on these seals..... Chuck jump in here if you are listening !! I do know that the flying conditions in Arizonia where he lives put a strain on both coolent and oil cooling systems and their respective seals.......If there are others currently flying these seals in the rotors I am not aware of who they are !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Russell Duffy" <13brv3@bellsouth.net>: -------------- The Rotor Oil Seal O-ring sizes are: (Credit to Paul Lamar) PFA-SIL 0.093" section 4.680 inch ID $4.59 each PFA-SIL 0.118" section 4.330 inch ID $4.47 " The Coolent O-ring sizes are: PFA-SIL 0.093" section 11.190 inch ID $8.33 " PFA-SIL 0.093" section 8.950 inch ID $6.60 " Hi Kelly, Thanks for posting the final results of your quest. This will be good info to stash away. If nothing else, these are quite a bit cheaper than the stock rings. Is anyone currently using the TES o-rings for the oil seals, and have significant time on them? Cheers, Rusty --NextPart_Webmail_9m3u9jl4l_13263_1125499546_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Rusty and all,

I am of the opinion (yet to be proven ) that the use of TES seals in the

rotors may raise the critical temp for oil.......It is well known that the 13B

is most efficient with oil temps in the 160 to 200 F range and that power

suffers above these numbers........I do not advocate flying with oil temps

above those numbers but most of us will struggle with oil temps as we

sort out our oil cooling systems.........My hope is that the TES seals will

provide a safety buffer for oil temp by preventing the rotor oil seals from

going away with short periods of over temp during test flying......The

same can be said for the inner coolent seal as well with the outer seal

probably not a real problem (but they are less expensive than stock)........

FWIW

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

-------------- Original message from keltro@att.net (Kelly Troyer): --------------

Rusty,

   Chuck Dunlap is currently flying with TES O-rings supplied to him

by Paul Lamar........ These are Creavey seals of the sizes determined

by Paul L.......I failed to ask Chuck the flying hours on these seals.....

Chuck jump in here if you are listening !! I do know that the flying

conditions in Arizonia where he lives put a strain on both coolent

and oil cooling systems and their respective seals.......If there are

others currently flying these seals in the rotors I am not aware of

who they are !!

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

-------------- Original message from "Russell Duffy" <13brv3@bellsouth.net>: --------------

The Rotor Oil Seal O-ring sizes are: (Credit to Paul Lamar)

PFA-SIL   0.093" section 4.680 inch ID $4.59 each
PFA-SIL   0.118" section 4.330 inch ID $4.47   "

The Coolent O-ring sizes are:

PFA-SIL   0.093" section 11.190 inch ID $8.33   "

PFA-SIL   0.093" section 8.950 inch ID $6.60   "

Hi Kelly,

Thanks for posting the final results of your quest. This will be good info to stash away. If nothing else, these are quite a bit cheaper than the stock rings.

Is anyone currently using the TES o-rings for the oil seals, and have significant time on them?

Cheers,

Rusty

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