Return-Path: Received: from [65.54.169.149] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2645869 for flyrotary@lancaironline.net; Tue, 21 Oct 2003 18:45:41 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 21 Oct 2003 15:34:39 -0700 Received: from 65.137.51.34 by bay3-dav119.bay3.hotmail.com with DAV; Tue, 21 Oct 2003 22:34:39 +0000 X-Originating-IP: [65.137.51.34] X-Originating-Email: [lors01@msn.com] Reply-To: "Tracy Crook" From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: temps behind radiator? Date: Tue, 21 Oct 2003 18:37:18 -0400 Organization: Real World Solutions Inc. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D5_01C39802.5B0DE660" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Message-ID: X-OriginalArrivalTime: 21 Oct 2003 22:34:39.0614 (UTC) FILETIME=[83A0D9E0:01C39823] This is a multi-part message in MIME format. ------=_NextPart_000_00D5_01C39802.5B0DE660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message I'm still interested to know how much heat the air picks up when = passing through a radiator. I realize that this can vary quite a bit, = but I just don't have a feel for how hot the air gets. If it's 80 = outside, does the air exit the back of the rad at 90, or 190, or? = Someone should really make an instrument with spare temp sensors that we = can use to measure these things :-) Cheers, Rusty (EWP's were in LA yesterday) Yeah, yeah, I get the hint. Well, I do have such an instrument in my = plane with a sensor in front of and behind the right-side rad and = seeing as much as 50 - 60 deg F temp rise. This could mean 2 things. = Terrific rad performance or lousy air flowrate. The airflow on the = right is not as good as on left where I happen to know it is pretty = good, so I should install a temp probe there too. In my version of what constitutes the optimum aircraft cooling system, = the exit air temp should be as close to the target coolant temp (on = exit from rad) as possible, i.e., the higher the better. This means = you have used the cooling air for everything it is worth, or put another = way, you used the minimum number of cooling CFM to do the job. =20 Tracy ------=_NextPart_000_00D5_01C39802.5B0DE660 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
 
I'm still = interested to=20 know how much heat the air picks up when passing through a = radiator.  I=20 realize that this can vary quite a bit, but I just don't have a = feel for=20 how hot the air gets.  If it's 80 outside, does the air exit the = back of=20 the rad at 90, or 190, or?  Someone should really make an = instrument=20 with spare temp sensors that we can use to measure these things=20 :-)
 
Cheers,
Rusty (EWP's = were in LA=20 yesterday)
 
Yeah, yeah, I get the hint.   = Well, I do=20 have such an instrument in my plane with a sensor in front of and = behind the=20 right-side  rad and seeing as much as 50 - 60 deg F temp=20 rise.    This could mean 2 things.   Terrific = rad=20 performance or lousy air flowrate.    The airflow on = the right=20 is not as good as on left where I happen to know it is pretty = good, so I=20 should install a temp probe there = too.
 
In my version of what constitutes the = optimum=20 aircraft cooling system,  the exit air temp should be as close to = the=20 target coolant temp (on exit from rad) as possible,  i.e.,  = the=20 higher the better.  This means you have used the cooling air for=20 everything it is worth, or put another way, you used the minimum = number of=20 cooling CFM to do the job. 
 
Tracy
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