X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2783030 for flyrotary@lancaironline.net; Sat, 08 Mar 2008 11:21:09 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080308162029.VOQN1982.fed1rmmtao104.cox.net@fed1rmimpo01.cox.net> for ; Sat, 8 Mar 2008 11:20:29 -0500 Received: from BigAl ([72.192.137.74]) by fed1rmimpo01.cox.net with bizsmtp id ygLE1Y00L1cVYgg0000000; Sat, 08 Mar 2008 11:20:14 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Emailing: Inclinded Radiators.doc Date: Sat, 8 Mar 2008 08:22:39 -0800 Message-ID: <001201c88138$a1110ce0$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01C880F5.92EDCCE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C880F5.92EDCCE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ed; With admittedly only a few minutes of study; I wouldn't draw any = conclusion from that report - other than for that particular duct design, inclining = the rad to a certain point resulted in better flow characteristics. Perhaps = a 'correct' design with a straight thru flow would be even better. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Saturday, March 08, 2008 7:13 AM To: Rotary motors in aircraft Subject: [FlyRotary] Emailing: Inclinded Radiators.doc =20 Here is an extract out of an article on race car cooling that is very interesting about use of inclined radiators. Unfortunately, I could not find any reference as to where this information was derived from - but, = if correct, is fairly significant. =20 It basically states that inclining a radiator from 0 deg to 20-30 deg = will decrease cooling and increase drag - not terribly surprising, however, = the article continues saying that at approx. 55 dig of inclination the = cooling effectiveness is 30% greater than a radiator with no inclination and the drag is 20% less!!! Now I found that surprising - but, then air flow = does take surprising twists (no pun intended). =20 While I find that claim very interesting - I have not found any collaborating documents. But, thought the group might find it = interesting =20 For your information =20 Ed =20 =20 The message is ready to be sent with the following file or link = attachments: Inclined Radiators.doc Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your = e-mail security settings to determine how attachments are handled. ------=_NextPart_000_0013_01C880F5.92EDCCE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Ed;

With admittedly only a few = minutes of study; I wouldn’t draw any conclusion from that report – = other than for that particular duct design, inclining the rad to a certain point = resulted in better flow characteristics.  Perhaps a ‘correct’ = design with a straight thru flow would be even better.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Saturday, March 08, = 2008 7:13 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Emailing: Inclinded Radiators.doc

 

Here is an extract out of = an article on race car cooling that is very interesting about use of inclined radiators.  Unfortunately, I could not find any reference as to = where this information was derived from - but, if correct, is fairly = significant.

 

It basically states that = inclining a radiator from 0 deg to 20-30 deg will decrease cooling and increase drag = - not terribly surprising, however, the article continues saying that at = approx. 55 dig of inclination the cooling effectiveness is 30% greater than a = radiator with no inclination and the drag is 20% less!!!  Now I found that surprising - but, then air flow does take surprising twists (no pun = intended).

 

While I find that claim very interesting - I have not found any collaborating documents.  But, thought the group might find it = interesting

 

For your = information

 

Ed

 

 

The message is ready to be sent with the = following file or link attachments:
Inclined Radiators.doc

Note: To protect against computer viruses, e-mail programs may prevent = sending or receiving certain types of file attachments.  Check your e-mail security settings to determine how attachments are = handled.

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