Return-Path: Received: from [65.54.169.54] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.9) with ESMTP id 711531 for flyrotary@lancaironline.net; Mon, 07 Feb 2005 14:16:24 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.169.54; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 7 Feb 2005 11:13:00 -0800 Message-ID: Received: from 4.174.4.64 by BAY3-DAV24.phx.gbl with DAV; Mon, 07 Feb 2005 19:12:20 +0000 X-Originating-IP: [4.174.4.64] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Heating the Fuel Date: Mon, 7 Feb 2005 14:12:17 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0058_01C50D1F.0800BAE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MIMEOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Mon, 7 Feb 2005 14:12:17 -0500 X-OriginalArrivalTime: 07 Feb 2005 19:13:00.0611 (UTC) FILETIME=[0A46C130:01C50D49] This is a multi-part message in MIME format. ------=_NextPart_000_0058_01C50D1F.0800BAE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Performance coatings- bearing damage?I personally like = this idea and I tried it for oil cooling. I used the return fuel as you = mentioned but the volume is not high enough. Got 2-3 degrees of oil = cooling (installed a valve to enable/disable oil cooling so I could = measure accurately) and temp rise in the wet-wing tank was not even = measurable. =20 I am going to try this again but with a separate high volume pump. FWIW, all hydraulic system cooling in jet airliners is done this way. Tracy (hands sticky with two part foam from refurbishing ratty travel = trailer) ----- Original Message -----=20 From: DaveLeonard=20 To: Rotary motors in aircraft=20 Sent: Monday, February 07, 2005 12:46 AM Subject: [FlyRotary] Heating the Fuel In anticipation of the new turbo, I am considering ways to improve = coolant cooling. Besides the obvious more air, more ducting, more = radiator; I have been again toying with the idea of a heat exchanger. = This time coolant to fuel. The plan would be to use a typical oil/water = exchanger but use fuel instead of oil. I would use the fuel on the way = back to the tank, and the coolant after it has already been cooled by = the radiator. The fuel would then go back to the nice metal tank of the = RV. I am looking for input on the implications of heating the fuel. I = expect it would reach max temps of about 190 (usually a little cooler) = but quickly cool once in the tank. Can the fuel tolerate that temp = without vaporizing? It will probably expand in the tank but I don't = expect that will occur faster than it is used up. I have no guess as to = what temp will become steady state for the fuel pumped out of the tank. = My guess is that it will not be much warmer than normal, but a slight = increase in temp may help with vaporization. The last question is how much will it cool the coolant. My hope is = about 10 deg but I doubt it will be quite that much. I know others have = considered using the fuel to cool (Tracy) and I would appreciate your = thoughts. Dave Leonard ------=_NextPart_000_0058_01C50D1F.0800BAE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Performance coatings- bearing = damage?
I personally like this idea and I tried it for oil cooling.  I = used=20 the return fuel as you mentioned but the volume is not high = enough.  Got=20 2-3 degrees of oil cooling (installed a valve to enable/disable oil = cooling so I=20 could measure accurately) and temp rise in the wet-wing tank was not = even=20 measurable.  
 
I am going to try this again but with a separate high volume = pump.
 
FWIW, all hydraulic system cooling in jet airliners is done this = way.
 
Tracy (hands sticky with two part foam from refurbishing ratty = travel=20 trailer)
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Monday, February 07, 2005 = 12:46=20 AM
Subject: [FlyRotary] Heating = the=20 Fuel

In=20 anticipation of the new turbo, I am considering ways to improve = coolant=20 cooling.  Besides the obvious more air, more ducting, more = radiator; I=20 have been again toying with the idea of a heat exchanger.  This = time=20 coolant to fuel.  The plan would be to use a typical oil/water = exchanger=20 but use fuel instead of oil.  I would use the fuel on the way = back to the=20 tank, and the coolant after it has already been cooled by the = radiator. =20 The fuel would then go back to the nice metal tank of the=20 RV.
 
I am=20 looking for input on the implications of heating the fuel.  I = expect it=20 would reach max temps of about 190 (usually a = little cooler) but=20 quickly cool once in the tank.  Can the fuel tolerate that temp = without=20 vaporizing?  It will probably expand in the tank but I don't = expect that=20 will occur faster than it is used up.  I have no guess as to what = temp=20 will become steady state for the fuel pumped out of the tank.  My = guess=20 is that it will not be much warmer than normal, but a slight increase = in temp=20 may help with vaporization.
 
The=20 last question is how much will it cool the coolant.  My hope is = about 10=20 deg but I doubt it will be quite that much.  I know others have=20 considered using the fuel to cool (Tracy) and I would appreciate your=20 thoughts.
 
Dave=20 Leonard
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