X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3567709 for flyrotary@lancaironline.net; Thu, 02 Apr 2009 01:47:10 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao105.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090402054632.RAQW15318.fed1rmmtao105.cox.net@fed1rmimpo02.cox.net> for ; Thu, 2 Apr 2009 01:46:32 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo02.cox.net with bizsmtp id aVmX1b00C3uzsQg04VmXDg; Thu, 02 Apr 2009 01:46:32 -0400 X-Authority-Analysis: v=1.0 c=1 a=4qGtKo_HrWwA:10 a=_wcuOgYionZt3dgG8dUA:9 a=jD34T2hhNaEnIVykmXAA:7 a=ljhDayV2QbqwvuWNZ5jkgVvDgFQA:4 a=gJcimI5xSWUA:10 a=LyJBN-ZnOZAgms97KV8A:9 a=p3CjpQPXfWpraXtU9ocA:7 a=lQ4I1XcMZcZIk39q0X5ZDeTlyAEA:4 a=37WNUvjkh6kA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] 20B mated to RV-10 Date: Wed, 1 Apr 2009 22:46:38 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C9B31B.B7E29AE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Importance: Normal Thread-Index: AcmzLunZJq9q+wQsQbSfIvbhXv/dMgALRQcg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C9B31B.B7E29AE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 If anyone with a proven cooling system design for the 20B can=20 provide radiator sizes and source(s), it would be most welcome. Phil White =20 Phil; =20 For my 20B in the Velocity I have two coolant radiators; one in the cowl that is 11.5" x 16" x 2.5" (460 cu. in.) from Ron Davis Racing; and one = in the wing root that is 6.5" x 22" x 3" (430 cu. in.) from Griffin. I = have an in-line thermostat in the circuit for the wing root rad, and except for = very hot days it is only operating during climb. I have a small oil/water HX in-line with the rad in the cowl, and in typical cruise, that rad = handles the coolant heat load, and about 30% of the oil heat load, and the = coolant still runs about 150F. =20 I have a large custom oil cooler in the other wing root that is about 5" = x 22" x 3.3" (365 cu. in.). The scoop/diffuser feeding this is not = optimum, which led to the addition of the water/oil HX. My oil temps typically = run about 10-20 above coolant temp. =20 Al G (my plane also gained about 100 lbs. Seems to be a common ailment) ------=_NextPart_000_0009_01C9B31B.B7E29AE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

If anyone with a proven cooling system design for the 20B can =

provide radiator sizes and source(s), it would be most = welcome.

Phil White

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Phil;

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For my 20B in = the Velocity I have two coolant radiators; one in the cowl that is 11.5” x 16” x = 2.5” (460 cu. in.) from Ron Davis Racing; and one in the wing root that is = 6.5” x 22” x 3” (430 cu. in.) from Griffin. I have an in-line thermostat in the circuit for the wing root rad, and = except for very hot days it is only operating during climb. I have a = small oil/water HX in-line with the rad in the cowl, and in typical cruise, = that rad handles the coolant heat load, and about 30% of the oil heat load, and = the coolant still runs about 150F.

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I have a = large custom oil cooler in the other wing root that is about 5” x 22” x = 3.3” (365 cu. in.). The scoop/diffuser feeding this is not optimum, = which led to the addition of the water/oil HX. My oil temps typically run = about 10-20 above coolant temp.

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Al G (my = plane also gained about 100 lbs. Seems to be a common = ailment)

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