X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp111.sbc.mail.mud.yahoo.com ([68.142.198.210] verified) by logan.com (CommuniGate Pro SMTP 4.3.5) with SMTP id 1024273 for flyrotary@lancaironline.net; Mon, 27 Jun 2005 23:14:29 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.198.210; envelope-from=dcarter@datarecall.net Received: (qmail 6803 invoked from network); 28 Jun 2005 03:13:44 -0000 Received: from unknown (HELO Davidscmptr) (dcarter11@sbcglobal.net@65.70.248.228 with login) by smtp111.sbc.mail.mud.yahoo.com with SMTP; 28 Jun 2005 03:13:43 -0000 Message-ID: <106201c57b8f$5d57c4a0$6401a8c0@ip.net> Reply-To: "David Carter" From: "David Carter" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Coolant Leak Date: Mon, 27 Jun 2005 22:13:32 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_105F_01C57B65.743E9920" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_105F_01C57B65.743E9920 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Agreed - the Ford Contour had the line from high point of engine into = bottom of "header tank". David ----- Original Message -----=20 From: Echo Lake Fishing Resort (Georges Boucher)=20 To: Rotary motors in aircraft=20 Sent: Monday, June 27, 2005 12:48 AM Subject: [FlyRotary] Re: Coolant Leak Jim=20 If your pressure cap equipped expansion "reservoir " coolant level = is higher than the rest of the system with about half a liter of air = above the coolant the system will self bleed & need no external = bleeding. (one thing the highest part of the engine coolant passage = should have a line to the tank. This as worked on vehicle that I worked = on since 1964 until I decided to semi-retire in 2000!. Georges B.=20 -------Original Message------- From: Rotary motors in aircraft Date: 06/26/05 22:28:34 To: Rotary motors in aircraft Subject: [FlyRotary] Re: Coolant Leak Add a little accumulator somewhere near the high point in the = system. A cup would seem to be more than adequate. Aside from that, maintain = your efforts to purge all air from the system (you CAN'T purge it form = the accumulator. Of course that *does* involve another footprint somewhere ... Jim = S. Echo Lake Fishing Resort (Georges Boucher) wrote: > I'm sure this isn't news to the group, but that "cup" of air = must be > (preferably in an expantion bottle) at the highest point in the = system. > Georges B. > /-------Original Message-------/ > /*From:*/ Rotary motors in aircraft = > /*Date:*/ 06/26/05 14:19:17 > /*To:*/ Rotary motors in aircraft = > /*Subject:*/ [FlyRotary] Re: Coolant Leak > > The important thing is that; whatever the cause, the pressure > transient is apparently a non-issue. Certainly lines covered = with > braided SS aren't going to expand much, but they still have = flexible > walls in there that do distort bit with pressure, as will the > thin-walled tank on a radiator. Clearly there is a hydraulic = pressure > being transmitted through the cooling system. My guess is that = the > cause is likely the immediate expansion of the inside walls of = the > rotor housing (temperature and pressure) while everything else = is > cool, followed closely thereafter by initial heating of the = coolant. > Heat transfer through the rotor housing does not happen > instantaneously. It's a guess, but hey; other than for mental > gymnastics, who cares? > > Al > > > I agree, Al, inquiring minds at least like a plausible = hypothesis and > I think the discussion has led to that. Perhaps I'll leave the = "cup" > of air, just for peace of mind {:>) > > Ed > > > > >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html .=20 =20 =20 ------=_NextPart_000_105F_01C57B65.743E9920 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Agreed - the Ford Contour had the line from high = point of=20 engine into bottom of "header tank".
 
David
 
----- Original Message -----=20
From: Echo Lake=20 Fishing Resort (Georges Boucher)
Sent: Monday, June 27, 2005 12:48 AM
Subject: [FlyRotary] Re: Coolant Leak

Jim
If your pressure cap equipped expansion "reservoir " = coolant=20 level is higher than the rest of the system with about half a = liter of air=20 above the coolant the system will self bleed & need = no external=20 bleeding. (one thing the highest part of the engine coolant = passage should=20 have a line to the tank. This as worked on vehicle that I = worked on=20 since 1964 until I decided to semi-retire in 2000!.
Georges B. 
 
-------Original = Message-------
 
From: Rotary motors in=20 aircraft
Date: = 06/26/05=20 22:28:34
To: Rotary motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: Coolant Leak
 
Add a little accumulator somewhere near the high point in the = system.=20 A
cup would seem to be more than adequate. Aside from that, = maintain=20 your
efforts to purge all air from the system (you CAN'T purge it = form=20 the
accumulator.
Of course that *does* involve another footprint somewhere ... = Jim=20 S.
 
Echo Lake Fishing Resort (Georges Boucher) wrote:
 
> I'm sure this isn't news to the group, but that "cup" of = air=20 must be
> (preferably in an expantion bottle) at the highest point = in the=20 system.
> Georges B.
> /-------Original Message-------/
> /*From:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironlin= e.net>
> /*Date:*/ 06/26/05 14:19:17
> /*To:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironlin= e.net>
> /*Subject:*/ [FlyRotary] Re: Coolant Leak
>
> The important thing is that; whatever the cause, the=20 pressure
> transient is apparently a non-issue. Certainly lines = covered=20 with
> braided SS aren=92t going to expand much, but they still = have=20 flexible
> walls in there that do distort bit with pressure, as = will=20 the
> thin-walled tank on a radiator. Clearly there is a = hydraulic=20 pressure
> being transmitted through the cooling system. My guess = is that=20 the
> cause is likely the immediate expansion of the inside = walls of=20 the
> rotor housing (temperature and pressure) while = everything else=20 is
> cool, followed closely thereafter by initial heating of = the=20 coolant.
> Heat transfer through the rotor housing does not = happen
> instantaneously. It=92s a guess, but hey; other than for = mental
> gymnastics, who cares?
>
> Al
>
>
> I agree, Al, inquiring minds at least like a plausible=20 hypothesis and
> I think the discussion has led to that. Perhaps I'll = leave the=20 "cup"
> of air, just for peace of mind {:>)
>
> Ed
>
>
>
>
 
>>  Homepage:  http://www.flyrotary.com/
>>  Archive:   http://lancai= ronline.net/lists/flyrotary/List.html
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