Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2624353 for flyrotary@lancaironline.net; Sat, 04 Oct 2003 20:56:39 -0400 Received: from rad ([68.212.15.208]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20031005005642.YKHA1810.imf24aec.mail.bellsouth.net@rad> for ; Sat, 4 Oct 2003 20:56:42 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Thick Vs Thin Radiators - NASCAR Date: Sat, 4 Oct 2003 19:56:40 -0500 Message-ID: <016b01c38adb$898b3b20$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_016C_01C38AB1.A0B53320" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_016C_01C38AB1.A0B53320 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit (Eds Note: This implies that the slower the air flow through the radiator (less dynamic pressure) then the thinner your radiator needs to be for good cooling - but, if you have the high dynamic pressure, then a more compact thicker radiator is perhaps a better solution) When I was dealing with Howe racing about my radiator, I asked about a 4 row, about 5 inch thick rad. They said that was the standard for the high speed tracks, specifically because it allowed them to reduce drag with the thicker core. That being said, my next Howe rad is going to be the same 2 row, 2.5 thick version that I have now, because I've added the oil cooler on top of it. The total thickness of rad and oil cooler is about 4.5". Rusty (flight report later) ------=_NextPart_000_016C_01C38AB1.A0B53320 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
(Eds Note:=20 This implies that the slower the air flow through the radiator (less = dynamic=20 pressure) then the thinner your radiator needs to be for good cooling - = but, if=20 you have the high dynamic pressure, then a more compact thicker radiator = is perhaps a better solution)
 
 
When I was=20 dealing with Howe racing about my radiator, I asked about a 4 row, about = 5 inch=20 thick rad.  They said that was the standard for the high speed = tracks,=20 specifically because it allowed them to reduce drag with the thicker=20 core.  
 
That being=20 said, my next Howe rad is going to be the same 2 row, 2.5 thick = version=20 that I have now, because I've added the oil cooler on top of = it.  The=20 total thickness of rad and oil cooler is about=20 4.5".   
 
Rusty (flight=20 report later)  
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