X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2783231 for flyrotary@lancaironline.net; Sat, 08 Mar 2008 13:35:14 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=dale.r@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao105.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080308183433.QXQR20794.fed1rmmtao105.cox.net@fed1rmimpo03.cox.net> for ; Sat, 8 Mar 2008 13:34:33 -0500 Received: from [192.168.1.115] ([72.223.44.12]) by fed1rmimpo03.cox.net with bizsmtp id yiZz1Y0010Flgvc0000000; Sat, 08 Mar 2008 13:33:59 -0500 Message-ID: <47D2DC38.9000802@cox.net> Date: Sat, 08 Mar 2008 11:34:32 -0700 From: Dale Rogers User-Agent: Thunderbird 2.0.0.12 (Windows/20080213) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Emailing: Inclinded Radiators.doc References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080309020300040508050704" This is a multi-part message in MIME format. --------------080309020300040508050704 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Russell Duffy wrote: > It basically states that inclining a radiator from 0 deg to 20-30 deg > will dec rease 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 > > Hi Ed, > > That is pretty interesting. Now that I think of it, we've had a few > people using extreme angles either blow, or beside the engine. Have > any of those people had cooling issues? > > Cheers, > Rusty (watching a near-blizzard outside) That's pretty much what nearly all the water-cooled canard fliers are doing. Not much room for any other strategy - with off-the-shelf radiators, anyway. Dale R. COZY MkIV #0497 Ch. 13 --------------080309020300040508050704 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Russell Duffy wrote:
Message
It basically states that inclining a radiator from 0 deg to 20-30 deg will dec   rease 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 
 
Hi Ed,
 
That is pretty interesting.  Now that I think of it, we've had a few people using extreme angles either blow, or beside the engine.  Have any of those people had cooling issues?
 
Cheers,
Rusty (watching a near-blizzard outside)

That's pretty much what nearly all the water-cooled canard fliers are doing.  Not much room for any other strategy - with off-the-shelf radiators, anyway.


Dale R.
COZY MkIV  #0497
Ch. 13

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