X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from [201.225.225.167] (HELO cwpanama.net) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1864122 for flyrotary@lancaironline.net; Mon, 26 Feb 2007 12:56:53 -0500 Received-SPF: none receiver=logan.com; client-ip=201.225.225.167; envelope-from=rijakits@cwpanama.net Received: from [201.224.94.164] (HELO usuario5ebe209) by frontend1.cwpanama.net (CommuniGate Pro SMTP 4.2.10) with SMTP id 103841656 for flyrotary@lancaironline.net; Mon, 26 Feb 2007 13:03:40 -0500 Message-ID: <03f701c759cf$6e81ef60$a45ee0c9@usuario5ebe209> From: "Thomas y Reina Jakits" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] cowl openings for water radiators Date: Mon, 26 Feb 2007 12:56:24 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_03F4_01C759A5.85589740" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_03F4_01C759A5.85589740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Question is not the exact size, but what kind of ducting you use? How do you exhaust the heated air? Do you use aumentation/cowl-flaps?? Thomas ----- Original Message -----=20 From: John Downing=20 To: Rotary motors in aircraft=20 Sent: Monday, February 26, 2007 12:12 PM Subject: [FlyRotary] cowl openings for water radiators What size openings do I need for the water radiators? The Wittman = Tailwind cowl I have has postal slots of 3' x 7 3/4" , which is = approx. 22 1/4 sq in. on each side. Sam James for the 160 Lycoming is = using 4 3/4' round holes which are 17.6 sq. inches on each side. My = radiators are quite close to the opening and I plan on making the = diffusers trumpet shaped, will the openings be large enough if I can = stay over 20 sq. inches on each side with a decent trumpet shape. JohnD = hushpowere II on order - hope to start in 2 weeks if weather = cooperates. -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_03F4_01C759A5.85589740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Question is not the exact size, but = what kind of=20 ducting you use?
How do you exhaust the heated = air?
Do you use = aumentation/cowl-flaps??
 
Thomas
----- Original Message -----
From:=20 John=20 Downing
Sent: Monday, February 26, 2007 = 12:12=20 PM
Subject: [FlyRotary] cowl = openings for=20 water radiators

What size openings do I need for the = water=20 radiators?   The Wittman Tailwind cowl I have has postal = slots of 3'=20 x 7 3/4" , which is   approx. 22 1/4 sq in. on each = side.  Sam=20 James for the 160 Lycoming is using 4 3/4' round holes which are 17.6 = sq.=20 inches on each side.  My radiators are quite close to the opening = and I=20 plan on making the diffusers trumpet shaped, will the openings be = large enough=20 if I can stay over 20 sq. inches on each side with a decent trumpet=20 shape.  JohnD       = hushpowere II on=20 order - hope to start in 2 weeks if weather cooperates.

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