X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail25.syd.optusnet.com.au ([211.29.133.166] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTPS id 611349 for flyrotary@lancaironline.net; Fri, 22 Jul 2005 03:43:35 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.166; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-108-201.dsl.nsw.optusnet.com.au [220.236.108.201]) by mail25.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j6M7gfFL026491 for ; Fri, 22 Jul 2005 17:42:43 +1000 Message-ID: <007101c58e91$0db958e0$c96cecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: TES "O" Rings Date: Fri, 22 Jul 2005 17:43:28 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006E_01C58EE4.DE9101E0" 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_006E_01C58EE4.DE9101E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kelly, It would seem by my findings that an "O" ring with a cross section of = approx .093 to .098 need a groove .071 to .074 deep and .122 to .126 = wide. We have .065 deep to 113 to .135. This is better suited to the TES type "O" ring, as it seems harder to = crush. Sorry my info can't be more accurate than that! Needless to say neither can the actual "O" rings as they vary from .095 = to .098 for the .093 size i.e. + or - .005. This leads me to think that = the + side is more the norm. My guess is that the .098 will be good for the inside groove, anything = bigger may be too big. OK! George ( down under) =20 George and All, I just realized I did not answer your question.......I wanted = to find a=20 cross section of the PFA-SIL that was close to the .098 as called out in earlier posts for the inner coolent O-ring......I measured the = coolent O-ring grooves of my housings........Both inner and outer grooves measured .065 thousands deep.......Width of the inner was.135 = thousands and width of the outer was .113 thousands........Now can someone much better in math than me figure what diameter of O-ring can we use in = the inner groove wthout causing a hydraulic rupture......The inner coolent = O-ring sees more heat and pressure than the outer O-ring !! On paper it appears = that a .093 thousands O-ring has enough crush according to the depth of the groove but it is free to rattle around in the .135 width.........IMHO -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 -------------- Original message from keltro@att.net (Kelly Troyer): = --------------=20 George, I was trying to find out what diameters (cross section) of the = high temp (500 degree f) PFA-SIL was available.........I wonder if the (450 = degree f) FEP-SIL might be good enough for the coolent O-rings but use the = high temp for the rotor side seal O-rings........If the coolent seals = ever see even=20 450 degrees the aluminum rotor hsgs will probably start to crush !! "Opinions" -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 -------------- Original message from "George Lendich" = : --------------=20 Kelly, What was that in relation to. George ( down under) Group, More info from "Creavey"=20 -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 From: "Jeff Chrysler" Save = Address Reminder=20 =20 To: "Kelly Troyer" =20 Subject: RE: Sil-PFA .098 availability=20 Date: Thu, 21 Jul 2005 17:12:27 +0000 [View Source]=20 =20 PFA is available in .103" cross section. =20 Jeff =20 ------------------------------------------------------------------ From: Kelly Troyer [mailto:keltro@att.net]=20 Sent: Thursday, July 21, 2005 11:48 AM To: Jeff Chrysler Subject: RE: Sil-PFA .098 availability =20 Jeff, Thanks Jeff........What diameters are available in = PFA-SIL........ .100 would probably work if available. =20 Kelly Troyer =20 ------=_NextPart_000_006E_01C58EE4.DE9101E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Kelly,
It would seem by my findings that an = "O" ring with=20 a cross section of approx .093 to .098 need a groove .071 to .074 deep = and .122=20 to .126 wide.
We have .065 deep  to 113 to=20 .135.
 
This is better suited to the TES type = "O" ring, as=20 it seems harder to crush.
 
Sorry my info can't be more = accurate than=20 that!
 
Needless to say neither can the actual = "O" rings as=20 they vary from .095 to .098 for the .093 size i.e. + or - .005. This = leads me to=20 think that the + side is more the norm.
 
My guess is that the .098 will be good = for the=20 inside groove, anything bigger may be too big.
OK!
George ( down=20 under)         
=
George and All,
       I just realized I did not = answer=20 your question.......I wanted to find a
cross section of the PFA-SIL that was close to the .098 as called = out
in earlier posts for the inner coolent O-ring......I measured the = coolent
O-ring grooves of my housings........Both inner and outer = grooves
measured .065 thousands deep.......Width of the inner was.135=20 thousands
and width of the outer was .113 thousands........Now can someone=20 much
better in math than me figure what diameter of O-ring can we = use in=20 the inner
groove wthout causing a hydraulic rupture......The inner coolent = O-ring=20 sees
more heat and pressure than the outer O-ring !! On paper it = appears=20 that
a .093 thousands O-ring has enough crush according to the depth = of=20 the
groove but it is free to rattle around in the .135=20 width.........IMHO
--
Kelly Troyer
Dyke=20 Delta/13B/RD1C/EC2




--------------=20 Original message from keltro@att.net (Kelly Troyer): -------------- =

George,
     I was trying to find out what = diameters (cross=20 section) of  the high temp
(500 degree f) PFA-SIL was available.........I wonder if the = (450=20 degree f)
FEP-SIL might be good enough for the coolent O-rings but use = the=20 high
temp for the rotor side seal O-rings........If the coolent = seals ever=20 see even
450 degrees the aluminum rotor hsgs will probably start to = crush=20 !!
 
"Opinions"
--
Kelly Troyer
Dyke=20 Delta/13B/RD1C/EC2




--------------=20 Original message from "George Lendich" = <lendich@optusnet.com.au>:=20 --------------

Kelly,
What was that in relation = to.
George ( down under)
Group,
   More info from "Creavey"
--
Kelly Troyer =
Dyke=20 Delta/13B/RD1C/EC2



From:   
"Jeff Chrysler" <jeff@creavey.com>     3D"" Save Address     3D"" Reminder
To:    "Kelly Troyer" <keltro@att.net>
Subject:    RE: Sil-PFA .098 availability
Date:    Thu, 21 Jul 2005 17:12:27=20 +0000   [View = Source]

3D""=20

PFA is=20 available in .103=94 cross = section.

 

Jeff

 

From: Kelly = Troyer=20 [mailto:keltro@att.net]
Sent: Thursday, = July 21, 2005=20 11:48 AM
To:=20 Jeff=20 Chrysler
Subject: RE: = Sil-PFA .098=20 availability

 

   =20 Jeff,

      = Thanks=20 Jeff........What diameters are available in = PFA-SIL........ =20 .100

would  probably work if=20 available.

 

  Kelly=20 = Troyer

=
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