Return-Path: Received: from fed1rmmtao11.cox.net ([68.230.241.28] verified) by logan.com (CommuniGate Pro SMTP 4.2.9) with ESMTP id 710843 for flyrotary@lancaironline.net; Mon, 07 Feb 2005 00:47:32 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.28; envelope-from=daveleonard@cox.net Received: from davidandanne ([68.101.147.215]) by fed1rmmtao11.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with SMTP id <20050207054559.ICYV25487.fed1rmmtao11.cox.net@davidandanne> for ; Mon, 7 Feb 2005 00:45:59 -0500 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: Heating the Fuel Date: Sun, 6 Feb 2005 21:46:02 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01C50C95.40FE3870" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0015_01C50C95.40FE3870 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit [FlyRotary] Re: Performance coatings- bearing damage?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_0015_01C50C95.40FE3870 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Performance coatings- bearing = damage?
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 have=20 been again toying with the idea of a heat exchanger.  This time = coolant to=20 fuel.  The plan would be to use a typical oil/water exchanger but = use fuel=20 instead of oil.  I would use the fuel on the way back to the tank, = and the=20 coolant after it has already been cooled by the radiator.  The fuel = would=20 then go back to the nice metal tank of the 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 will=20 become steady state for the fuel pumped out of the tank.  My guess = is that=20 it will not be much warmer than normal, but a slight increase in temp = may help=20 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 = considered=20 using the fuel to cool (Tracy) and I would appreciate your=20 thoughts.
 
Dave=20 Leonard
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