Return-Path: Received: from [65.54.168.107] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3067757 for flyrotary@lancaironline.net; Sun, 07 Mar 2004 12:39:37 -0500 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 7 Mar 2004 09:39:37 -0800 Received: from 64.159.105.65 by bay3-dav3.bay3.hotmail.com with DAV; Sun, 07 Mar 2004 17:39:36 +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 12:39:35 -0500 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_000A_01C40441.3F52E8C0" Message-ID: X-OriginalArrivalTime: 07 Mar 2004 17:39:37.0060 (UTC) FILETIME=[2916FA40:01C4046B] ------=_NextPart_001_000A_01C40441.3F52E8C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, it would be an interesting and complex programming exercise and you= would need to sense more things than you expect (altitude change for ins= tance). It also assumes you have foreknowledge of what all the failure modes are= As it turns out, it's always the unexpected ones that get you. The be= st 'small processor' to use would be the one in our heads : ) But don't= let this stop you if you have the inclination to do it. Tracy ----- Original Message ----- From: lonnwood Sent: Sunday, March 07, 2004 12:22 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Cooling System Dynamics Tracy, this has got me to thinking about an alarm system that would be us= eful for the coolant pressure gauge. A simple pressure activated warning light would not be useful because the= pressure starts out at zero and gradually builds, then during different modes of flight when your engine = cools the pressure would go back down. Not having flown with a water cooled system yet I don't know how much it = would fluctuate. =20 Would it be worthwhile to have a small processor programmed to keep track= of engine temps and compare those to what the coolant pressure should be, then set the alarm off if t= hey don't add up? Lonnie 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_000A_01C40441.3F52E8C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, it would be an inter= esting and complex programming exercise and you would need to sense more = things than you expect (altitude change for instance).
 I= t also assumes you have foreknowledge of what all the failure modes = are.  As it turns out, it's always the unexpected ones that get you.=   The best 'small processor' to use would be the one in our heads : = )   But don't let this stop you if you have the inclination to = do it.
 
Tracy
----- Ori= ginal Message -----
From: lonnwood
Sent: Sunday, March 07, 2004 12:22 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Cooling System Dynamic= s
 
Tracy, this has got m= e to thinking about an alarm system that would be useful for the coolant = pressure gauge.
A simple pressure ac= tivated warning light would not be useful because the pressure starts out= at zero and
gradually builds, then = during different modes of flight when your engine cools the pressure woul= d go back down.
Not having flown wit= h a water cooled system yet I don't know how much it would fluctuate.
Would it be worthwhile to have a small= processor programmed to keep track of engine temps and compare
those to what the coolant pressure shoul= d be, then set the alarm off if they don't add up?
Lonnie
 <= /DIV>
 
 
 
 
The best advice I can give is to learn= the behavior (not just the static reading) of your coolant pressure gaug= e and pay attention to any anomaly.  It tells the whole story IF you= know how to interpret it.
 
Tracy Crook
=
 
 
------=_NextPart_001_000A_01C40441.3F52E8C0--