Return-Path: Received: from [65.54.169.143] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3067651 for flyrotary@lancaironline.net; Sun, 07 Mar 2004 12:00:36 -0500 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 7 Mar 2004 09:00:36 -0800 Received: from 64.159.105.65 by bay3-dav113.bay3.hotmail.com with DAV; Sun, 07 Mar 2004 17:00:35 +0000 X-Originating-IP: [64.159.105.65] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Cooling System Dynamics Date: Sun, 7 Mar 2004 12:00:34 -0500 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0008_01C4043B.CC19A1F0" Message-ID: X-OriginalArrivalTime: 07 Mar 2004 17:00:36.0069 (UTC) FILETIME=[B5C01950:01C40465] ------=_NextPart_001_0008_01C4043B.CC19A1F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I still haven't heard anyone describe an incident that actually happened= where a coolant level indicator did or even could have detected a proble= m that actually happened that a pressure reading did not or could not det= ect at least as well. =20 Jim S All this talk of coolant levels is misleading. Ed Andersen hinted at th= e actual events going on inside the cooling system in an earlier message.= As he said, the coolant flow is like a fire hose, not like a placid pon= d with a leak at the bottom. A coolant level detector would not have hel= ped in my actual coolant loss event. Proper attention to my pressure gau= ge would have. When the level drops and air or steam is entrained in the coolant, the w= ater pump whips the coolant into a froth that gets increasingly "airy" un= til the pump will no longer function (the dynamics of which I will not ex= pound on). =20 The best advice I can give is to learn the behavior (not just the static = reading) of your coolant pressure gauge and pay attention to any anomaly.= It tells the whole story IF you know how to interpret it. Tracy Crook ------=_NextPart_001_0008_01C4043B.CC19A1F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I still haven't hear= d anyone describe an incident that actually happened where a coola= nt level indicator did or even could have detected a proble= m that actually happened that a pressure reading did not or could = not detect at least as well.

Jim S

All this talk of coolant levels is misleading. = Ed Andersen hinted at the actual events going on inside the coolin= g system in an earlier message. As he said, the coolant flow is lik= e a fire hose, not like a placid pond with a leak at the bottom. A = coolant level detector would not have helped in my actual coolant loss ev= ent. Proper attention to my pressure gauge would have.

&= nbsp;

When the level drops and air or steam is entrained= in the coolant, the water pump whips the coolant into a froth that = gets increasingly "airy" until the pump will no longer function (the dyna= mics of which I will not expound on).

= The best advice I can give is to learn the behavior (not just the static = reading) of your coolant pressure gauge and pay attention to any anomaly.= It tells the whole story IF you know how to interpret it.

Tracy Crook

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