X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 30 Mar 2007 23:22:58 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m21.mx.aol.com ([64.12.137.2] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1952907 for lml@lancaironline.net; Fri, 30 Mar 2007 18:16:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.2; envelope-from=REHBINC@aol.com Received: from REHBINC@aol.com by imo-m21.mx.aol.com (mail_out_v38_r7.10.) id q.ccc.e0d356a (41809) for ; Fri, 30 Mar 2007 18:15:56 -0400 (EDT) From: REHBINC@aol.com X-Original-Message-ID: X-Original-Date: Fri, 30 Mar 2007 18:15:56 EDT Subject: Re: [LML] Re: Thielert Diesel Centurion 4.0 X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1175292956" X-Mailer: 9.0 for Windows sub 5126 X-Spam-Flag: NO -------------------------------1175292956 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/30/2007 9:47:38 AM Eastern Standard Time, lancair@USTEK.COM writes: Cars in general run at a low power setting for cruise - I believe at 20% max output, so the heat dissipated would be much lower compared to aircraft use where we start at 65% and go up from there. Robert M. Simon ES-P N301ES Robert, That's correct. What's more, when comparing thermal efficiency between the two engines at part throttle, the diesel is quite a bit better due to the pumping losses of the throttle body on a gas engine. This increased efficiency would reduce the radiator size requiremnet somewhat more on the diesel than the gas engine. I was simply pointing out that in comparable applications, the radiator sizes aren't greatly different. I've only made one tape measure comparison and that was on two tractors and the gas tractor actually had more cubic inches of radiator per hp than the diesel. Tractors typically operate at high output levels just like airplanes. Rob ************************************** See what's free at http://www.aol.com. -------------------------------1175292956 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 3/30/2007 9:47:38 AM Eastern Standard Time, lancair@= USTEK.COM writes:
Cars in general run at a low power setting for= cruise - I believe at 20%
max output, so the heat dissipated would be mu= ch lower compared to
aircraft use where we start at 65% and go up from th= ere. 

Robert M. Simon
ES-P N301ES
Robert,
 
That's correct. What's more, when comparing thermal efficiency between=20= the two engines at part throttle, the diesel is quite a bit better due to th= e pumping losses of the throttle body on a gas engine. This increa= sed efficiency would reduce the radiator size requiremnet somewhat more on t= he diesel than the gas engine.
 
I was simply pointing out that in comparable applications, the radiator= sizes aren't greatly different. I've only made one tape measure comparison=20= and that was on two tractors and the gas tractor actually had more cubi= c inches of radiator per hp than the diesel. Tractors typically operate at h= igh output levels just like airplanes.
 
Rob



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