X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [67.19.241.218] (HELO cpanel12.pronethosting.net.) by logan.com (CommuniGate Pro SMTP 5.0.7) with ESMTPS id 962458 for flyrotary@lancaironline.net; Tue, 31 Jan 2006 17:00:02 -0500 Received-SPF: none receiver=logan.com; client-ip=67.19.241.218; envelope-from=greg@itmack.com Received: from c220-239-88-212.rochd1.qld.optusnet.com.au ([220.239.88.212]:1229 helo=NOTEBOOK) by cpanel12.pronethosting.net. with smtp (Exim 4.52) id 1F43Wm-0004S6-St for flyrotary@lancaironline.net; Tue, 31 Jan 2006 15:59:09 -0600 Message-ID: <008001c626b1$a7a73d60$6802a8c0@NOTEBOOK> From: "Greg@itmack" To: "Rotary motors in aircraft" References: Date: Wed, 1 Feb 2006 07:59:46 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_007D_01C62705.781B1B80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Subject: Re: [FlyRotary] Re: Cooling air inlets X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel12.pronethosting.net. X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - itmack.com X-Source: X-Source-Args: X-Source-Dir: This is a multi-part message in MIME format. ------=_NextPart_000_007D_01C62705.781B1B80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tracy, just wondering why you went for the "classic" cowl instead of the = Sam James purpose built rotary cowl? Greg 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_007D_01C62705.781B1B80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Tracy, just wondering why you went for the = "classic" cowl=20 instead of the Sam James purpose built rotary cowl?

Greg

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=20

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=20 2 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=20 engine. = JohnD

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