Return-Path: Received: from fed1mtao03.cox.net ([68.6.19.242] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2752672 for flyrotary@lancaironline.net; Thu, 20 Nov 2003 02:10:14 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao03.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20031120071007.MYEN28419.fed1mtao03.cox.net@BigAl> for ; Thu, 20 Nov 2003 02:10:07 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Core vs Radistor was Re: [FlyRotary] radiator Date: Wed, 19 Nov 2003 23:10:26 -0800 Message-ID: <001f01c3af35$5f555060$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C3AEF2.51321060" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C3AEF2.51321060 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Watch out for naca ducting for cooling. they have a reputation for not working. Having said that, look at an article in this months Sport Aviation. I forgot the plane type, but using the naca duct on an IO-540. It completely failed in several positions until he added difusers (sp) in front. Now works fine. There are pictures. Interesting! Not diffusers, Jim. Vortex generators (vgs). It is on an E-racer. Claims the vgs doubled the air flow. Al ------=_NextPart_000_0020_01C3AEF2.51321060 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Watch out for naca ducting for cooling. they have a

reputation for not working. Having said that, look at

an article in this months Sport Aviation. I forgot the

plane type, but using the naca duct on an IO-540. It

completely failed in several positions until he added

difusers (sp) in front. Now works fine. There are

pictures. Interesting!

Not = diffusers, Jim. Vortex generators (vgs). It is on an E-racer. = Claims the vgs doubled the air flow.

<= /font>

Al =

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