X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTP id 4083853 for flyrotary@lancaironline.net; Fri, 15 Jan 2010 10:05:29 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao104.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100115150451.BJTK16123.fed1rmmtao104.cox.net@fed1rmimpo01.cox.net> for ; Fri, 15 Jan 2010 10:04:51 -0500 Received: from BigAl ([72.192.128.205]) by fed1rmimpo01.cox.net with bizsmtp id Vr4s1d0094S1t5C03r4sFk; Fri, 15 Jan 2010 10:04:52 -0500 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=4cmh2gL1a6RJOvq2diO5/mV5P7W7DelkioqUudxRLMU= c=1 sm=1 a=7is6ADb-yswA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=yAQ4fO8kdGBvhrt0IQoA:9 a=nR_BA0RN14fS2IDsFfqYUgRa3pQA:4 a=8X1FFCfmZqk_JPPVtLsA:9 a=Czx54AEGMo99TsnAgEsA:7 a=FqWAsGj2Ir9NmnC9yEsP_TADzqYA:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Inclined Radiators was : [FlyRotary] Re: Scoops Date: Fri, 15 Jan 2010 07:06:22 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01CA95B1.3EF19450" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: AcqV681vOtRTOhbPQuWvd62fYWIrmQAB7Jsg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0016_01CA95B1.3EF19450 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Basically the figures that George mentioned were quoted in the source. However (big however) what may not have been clearly pointed out was = that the major part of the reason cooling effectiveness (not efficiency) increased was that inclining the heat exchanger permitted you to install ever larger area cores in the same size duct. So the increase in = cooling effectiveness by inclination was in large part (like 'entirely' - my = words) due to the larger size radiator permitted by inclined placement in the = duct. Yeah; that's it. Thanks, Ed. With modern high density cores, basically straight thru is best = efficiency and lowest weight. =20 Al =20 =20 ------=_NextPart_000_0016_01CA95B1.3EF19450 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Basically the = figures that George mentioned were quoted in the source.  However (big = however) what may not have been clearly pointed out was that the major part of = the reason cooling effectiveness (not efficiency) increased was that = inclining the heat exchanger permitted you to install ever larger area cores in the = same size = duct.  So the increase in cooling effectiveness by inclination was in large part (like = ‘entirely’ – my words) = due to the larger size radiator permitted by inclined = placement in the duct.

Yeah; that’s it.  = Thanks, Ed.

With modern high density cores, = basically straight thru is best efficiency and lowest weight.

 

Al

 

 

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