X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [65.54.250.79] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0.7) with ESMTP id 960182 for flyrotary@lancaironline.net; Sun, 29 Jan 2006 20:36:23 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.79; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 29 Jan 2006 17:35:39 -0800 Message-ID: Received: from 4.171.129.19 by BAY115-DAV7.phx.gbl with DAV; Mon, 30 Jan 2006 01:35:39 +0000 X-Originating-IP: [4.171.129.19] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Cooling air inlets Date: Sun, 29 Jan 2006 20:35:36 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01B5_01C62513.8F695890" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Sun, 29 Jan 2006 20:35:36 -0500 X-OriginalArrivalTime: 30 Jan 2006 01:35:39.0763 (UTC) FILETIME=[7A0E5430:01C6253D] This is a multi-part message in MIME format. ------=_NextPart_000_01B5_01C62513.8F695890 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi John, There are no ballpark figures, only arguments about them : ) FWIW, I am using a Sam James cowl with 5" round inlets and fervently = hope that they will cool my 20B. Tracy (dangerously close to first engine start) ----- Original Message -----=20 From: John Downing=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 29, 2006 8:06 PM Subject: [FlyRotary] Cooling air inlets I am modifying the cowling for the Tailwind. The air inlet holes are = 2 5/8"s x 7.5"s for a total of app. 21.5 sq. inches. x 2 for a total of = 43. I am looking at a 5 inch round hole which is the size that Same = James is using for the O-320's, which would make the diffusers easier = to fabricate. The round 5 " hole has approximately 19.3 sq inches x 2 = for 38.6 sq. inches total, if my math is right. Is this a ball park = figure for the water coolers (GM evaporators) on the Mazda 13 B engine. = JohnD ------=_NextPart_000_01B5_01C62513.8F695890 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi John,

There are no ballpark figures, only arguments about them : = )

FWIW, I am using a Sam James cowl with 5" round inlets = and fervently=20 hope that they will cool my 20B.

Tracy (dangerously close to first engine start)

----- Original Message -----

From: John Downing

To: Rotary motors in = aircraft

Sent: Sunday, January 29, 2006 = 8:06=20 PM

Subject: [FlyRotary] Cooling = air=20 inlets

I am modifying the cowling for the=20 Tailwind. The air inlet holes are 2 5/8"s x 7.5"s for a total = of =20 app. 21.5 sq. inches. x 2 for a total of 43. I am looking = at a 5=20 inch round hole which is the size that Same James is using for=20 the O-320's, which would make the diffusers easier to=20 fabricate. The round 5 " hole has approximately 19.3 sq = inches x 2=20 for 38.6 sq. inches total, if my math is right. Is this a ball = park=20 figure for the water coolers (GM evaporators) on the Mazda 13 B = engine. =20 JohnD

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