X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m27.mx.aol.com ([64.12.137.8] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3206832 for flyrotary@lancaironline.net; Thu, 09 Oct 2008 19:32:47 -0400 Received: from WRJJRS@aol.com by imo-m27.mx.aol.com (mail_out_v39.1.) id q.ce1.3a0ddefd (37056) for ; Thu, 9 Oct 2008 19:32:38 -0400 (EDT) Received: from smtprly-ma01.mx.aol.com (smtprly-ma01.mx.aol.com [64.12.207.140]) by cia-db04.mx.aol.com (v121_r3.13) with ESMTP id MAILCIADB042-90c048ee94961b7; Thu, 09 Oct 2008 19:32:38 -0400 Received: from WEBMAIL-DZ15 (webmail-dz15.sim.aol.com [205.188.185.29]) by smtprly-ma01.mx.aol.com (v121_r3.13) with ESMTP id MAILSMTPRLYMA012-5c4448ee948a357; Thu, 09 Oct 2008 19:32:27 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Radiator size Date: Thu, 09 Oct 2008 19:32:27 -0400 X-AOL-IP: 66.253.96.220 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CAF87E6C958199_17D8_1CA5_WEBMAIL-DZ15.sysops.aol.com" X-Mailer: AOL Webmail 39155-STANDARD Received: from 66.253.96.220 by WEBMAIL-DZ15.sysops.aol.com (205.188.185.29) with HTTP (WebMailUI); Thu, 09 Oct 2008 19:32:27 -0400 Message-Id: <8CAF87E6C8E5A91-17D8-E1E@WEBMAIL-DZ15.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CAF87E6C958199_17D8_1CA5_WEBMAIL-DZ15.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Giff, A great deal of the size depends on how good the ducts to and from the radiator/s are. The convenrtional thinking is 2-3 c.i./hp. For example if you have 200 hp you will need 400-600 cubic inches of heat exchanger. If you plan to try to do it inside the cowl, make it as big as you can and still get it to fit. It is hard to get efficient ducts inside the cowl. Bill Jepson -----Original Message----- From: Giffen Marr To: Rotary motors in aircraft Sent: Thu, 9 Oct 2008 3:39 pm Subject: [FlyRotary] Radiator size I am trying to get a rule of thumb for required radiator size. I would like to know the engine HP and the size of the radiator, in order to determine the cubic inches of radiator required for each horsepower. Giff Marr -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html ----------MB_8CAF87E6C958199_17D8_1CA5_WEBMAIL-DZ15.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Giff,
A great deal of the size depends on how good the ducts to and from the radiator/s are. The convenrtional thinking is 2-3 c.i./hp. For example if you have 200 hp you will need 400-600 cubic inches of heat exchanger. If you plan to try to do it inside the cowl, make it as big as you can and still get it to fit. It is hard to get efficient ducts inside the cowl.
Bill Jepson


-----Original Message-----
From: Giffen Marr <GAMarr@Charter.Net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, 9 Oct 2008 3:39 pm
Subject: [FlyRotary] Radiator size

I am trying to get a rule of thumb for required radiator size.
I would like to know the engine HP and the size of the radiator, in order to
determine the cubic inches of radiator required for each horsepower.

Giff Marr


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