X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [199.185.220.223] (HELO priv-edtnes28.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.3.5) with ESMTP id 1022792 for flyrotary@lancaironline.net; Mon, 27 Jun 2005 01:49:09 -0400 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.223; envelope-from=echolakeresort@telus.net Received: from boucher-oddle24 ([207.194.127.101]) by priv-edtnes28.telusplanet.net (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with SMTP id <20050627054818.DPZ7254.priv-edtnes28.telusplanet.net@boucher-oddle24> for ; Sun, 26 Jun 2005 23:48:18 -0600 MIME-Version: 1.0 Message-Id: <42BF931D.000003.02072@BOUCHER-ODDLE24> Date: Sun, 26 Jun 2005 22:48:13 -0700 (Pacific Standard Time) Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_DSAQG6G0000000000000" X-Mailer: IncrediMail (3001609) From: "Echo Lake Fishing Resort (Georges Boucher)" References: To: Subject: Re: [FlyRotary] Re: Coolant Leak X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 --------------Boundary-00=_DSAQG6G0000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jim =0D If your pressure cap equipped expansion "reservoir " coolant level is hig= her than the rest of the system with about half a liter of air above the cool= ant 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= =2E This as worked on vehicle that I worked on since 1964 until I decided to semi-retire in 2000!.=0D Georges B. =0D =0D -------Original Message-------=0D =0D From: Rotary motors in aircraft=0D Date: 06/26/05 22:28:34=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] Re: Coolant Leak=0D =0D Add a little accumulator somewhere near the high point in the system. A=0D cup would seem to be more than adequate. Aside from that, maintain your=0D efforts to purge all air from the system (you CAN'T purge it form the=0D accumulator.=0D Of course that *does* involve another footprint somewhere ... Jim S.=0D =0D Echo Lake Fishing Resort (Georges Boucher) wrote:=0D =0D > I'm sure this isn't news to the group, but that "cup" of air must be=0D > (preferably in an expantion bottle) at the highest point in the system.= =0D > Georges B.=0D > /-------Original Message-------/=0D > /*From:*/ Rotary motors in aircraft =0D > /*Date:*/ 06/26/05 14:19:17=0D > /*To:*/ Rotary motors in aircraft =0D > /*Subject:*/ [FlyRotary] Re: Coolant Leak=0D >=0D > The important thing is that; whatever the cause, the pressure=0D > transient is apparently a non-issue. Certainly lines covered with=0D > braided SS aren=92t going to expand much, but they still have flexible=0D > walls in there that do distort bit with pressure, as will the=0D > thin-walled tank on a radiator. Clearly there is a hydraulic pressure=0D > being transmitted through the cooling system. My guess is that the=0D > cause is likely the immediate expansion of the inside walls of the=0D > rotor housing (temperature and pressure) while everything else is=0D > cool, followed closely thereafter by initial heating of the coolant.=0D > Heat transfer through the rotor housing does not happen=0D > instantaneously. It=92s a guess, but hey; other than for mental=0D > gymnastics, who cares?=0D >=0D > Al=0D >=0D >=0D > I agree, Al, inquiring minds at least like a plausible hypothesis and=0D > I think the discussion has led to that. Perhaps I'll leave the "cup"=0D > of air, just for peace of mind {:>)=0D >=0D > Ed=0D >=0D >=0D >=0D >=0D =0D >> Homepage: http://www.flyrotary.com/=0D >> Archive: http://lancaironline.net/lists/flyrotary/List.html=0D =2E --------------Boundary-00=_DSAQG6G0000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jim
If your pressure cap equipped expansion "reservoir " coolant le= vel 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 shoul= d have a line to the tank. This as worked on vehicle that I worked o= n since 1964 until I decided to semi-retire in 2000!.
Georges B. 
 
-------Original Message-------
 
Date: 06/26/05 22:= 28:34
Subject: [FlyRotar= y] Re: Coolant Leak
 
Add a little accumulator somewhere near the high point in the system= =2E A
cup would seem to be more than adequate. Aside from that, maintain y= our
efforts to purge all air from the system (you CAN'T purge it form th= e
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 mu= st be
> (preferably in an expantion bottle) at the highest point in the= system.
> Georges B.
> /-------Original Message-------/
> /*From:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
> /*Date:*/ 06/26/05 14:19:17
> /*To:*/ Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
> /*Subject:*/ [FlyRotary] Re: Coolant Leak
>
> The important thing is that; whatever the cause, the pressure
> transient is apparently a non-issue. Certainly lines covered wi= th
> braided SS aren=92t going to expand much, but they still have f= lexible
> walls in there that do distort bit with pressure, as will the
> thin-walled tank on a radiator. Clearly there is a hydraulic pr= essure
> 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 coo= lant.
> 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 hypothes= is 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/
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