Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.93.67.84] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2579431 for flyrotary@lancaironline.net; Sun, 14 Sep 2003 21:24:46 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-03.southeast.rr.com (8.12.5/8.12.2) with SMTP id h8F1MZ4S028397 for ; Sun, 14 Sep 2003 21:22:36 -0400 (EDT) Message-ID: <004801c37b27$df46b580$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Size makes a difference Date: Sun, 14 Sep 2003 21:22:47 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Yes total inlet area for radiators and oil cooler is now about 57 square inches. The one radiator duct only has an 9 square inche opening. The other one and oil cooler remain for the moment at 24 square inches each. I suspect that the one radiator with the unmodified duct and the oil cooler are picking up some of the heat load and coolant temp did increase by 5 F. I am a little hesitant to reduce the other radiator to 9 square inches as somehow my gut feel is that the coolant temp wouldn't just increase by possible another 5F but considerably more - guess there is only one way to find out {:>). I think when this is said and done I will find I can reduce the ducts through using my "modified" K&M profile inlets and still have adequate cooling. Perhaps both ducts might end up around 12-15 square inches. I think there should be some decrease in cooling drag if I reduce the intakes as that clearly shows the air that was going in wasn't doing as good a job as it could - given the sharp wall turns I probably had a lot of air flow turbulence and eddies. Also I need would then need to do something about my 28x 4 1/2 air flow outlet to reduce the drag I am certain it is causing. But, right now I am trying to get manifold #4 done in time to fly it to Shady Bend rotary flyin in October. Do you plan on going? Best Regards Ed ----- Original Message ----- From: "Tommy James" To: "Rotary motors in aircraft" Sent: Sunday, September 14, 2003 2:32 PM Subject: [FlyRotary] Size makes a difference > Ed, as I remember, you oil cooling duct is 24 sq. in. plus the new 33 in for > coolant. a total of about 57 sq. in. Is that correct? If so, that's > mighty small, but apparently does the job. There must be a good reduction > of drag too. > Regards, > Tommy<>< > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html