X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from zproxy.gmail.com ([64.233.162.206] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 989542 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 23:21:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.162.206; envelope-from=wdleonard@gmail.com Received: by zproxy.gmail.com with SMTP id 34so436623nzf for ; Wed, 08 Jun 2005 20:20:59 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:references; b=B4sUXX5IgvnY3+GDf2ahRJrFC9ZL0e9uWUN7ARtL3PAtqOK1EWRLi7sKNUe1q1pz2a5RvhpQbuNOONPe5Xe1xr6bvHMwfZ7UVwdJSF+vaF65Ks/aGnMCcf+SA5JK6tBUFywdP8dBJcX/sVP0U6F4O6WuHbn4zqtTWv5kZBIDe/w= Received: by 10.36.222.70 with SMTP id u70mr100961nzg; Wed, 08 Jun 2005 20:20:59 -0700 (PDT) Received: by 10.36.9.4 with HTTP; Wed, 8 Jun 2005 20:20:59 -0700 (PDT) Message-ID: <1c23473f05060820207a91947@mail.gmail.com> Date: Wed, 8 Jun 2005 20:20:59 -0700 From: David Leonard Reply-To: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: coolant leak In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5261_15565593.1118287259339" References: ------=_Part_5261_15565593.1118287259339 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 6/8/05, William wrote:=20 >=20 > In a liquid cooling system that has no *non-condensible* gas (i.e. air),= =20 > the pressure will rise due to thermal expansion of the liquid, until it g= ets=20 > to the pressure relief value of the cap, at which pressure a small amount= of=20 > the expanding liquid will go into the overflow bottle. > Upon cooling, the liquid volume shrinks, and the pressure decreases unti= l=20 > it is lower than that in the bottle, and liquid is sucked back into the= =20 > system. If the bottle is pressurized, then the pressure in the system wil= l=20 > only go down to the pressure of the bottle. This may be what is being=20 > described in Dave's system.=20 > Dave, do you have a *pressurized* overflow bottle? > Bill Schertz > KIS Cruiser # 4045 >=20 Bill, yes, I have a prssurized overflow bottle (that's a lot easier way of= =20 saying it than my other posts :-) Will try taking the cap off that and running the system, that should sort= =20 everything out. Thanks!! --=20 Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/vp4skydoc/index.html ------=_Part_5261_15565593.1118287259339 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline

On 6/8/05, W= illiam <wschertz@ispwest.com= > wrote:
In a liquid cooling system that has no= *non-condensible* gas (i.e. air), the pressure will rise due to thermal ex= pansion of the liquid, until it gets to the pressure relief value of the ca= p, at which pressure a small amount of the expanding liquid will go into th= e overflow bottle.
 
Upon cooling, the liquid volume shrink= s, and the pressure decreases until it is lower than that in the bottle, an= d liquid is sucked back into the system.  If the bottle is pressurized= , then the pressure in the system will only go down to the pressure of the = bottle. This may be what is being described in Dave's system.=20
 
Dave, do you have a *pressurized* over= flow bottle?
Bill Schertz
KIS Cruiser # 4045
 
Bill, yes, I have a prssurized overflow bottle (that's a lot easier wa= y of saying it than my other posts :-)
 
Will try taking the cap off that and running the system, that should s= ort everything out.  Thanks!!
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