X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3740680 for flyrotary@lancaironline.net; Tue, 30 Jun 2009 18:48:10 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id B6065173B3D for ; Wed, 1 Jul 2009 06:47:28 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id C991E1153FB9 for ; Wed, 1 Jul 2009 06:47:23 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Round Radiators Date: Wed, 1 Jul 2009 08:47:30 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C9FA28.914D06F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 090630-0, 06/30/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C9FA28.914D06F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed, Bernie's comments on weird have prompted me to start my investigation on = a round radiator, PWR locally has an engineer who is interested in my = ideas and we may move to develop a prototype. It seems the easiest way to manufacture this type of radiator is along = the lines of the stacker radiator, used mostly for water to oil and are = very efficient for this purpose. I've seen where people are using them = for radiators in racing. To optimize the suitability for my application = the air flow channels would be modified for reasons of maximum surface = area, turbulence etc. Naturally a round radiator need to be thinner rather than thicker ( = unlike the round intercoolers). In my design the air flows from the = centre outwardly and taken back toward a butterfly to control the exit = air flow. The inlet would need to be shaped to maximize pressure as would the = internals. I can't easily explain everything but I would appreciate some = help with sizing fore hp etc. I do have notes on the subject and will = have to find them again but I think a rule of thumb is either 3 sq" per = hp or 3 cu" per hp and radiator incidence in excess of 55 deg and if the = angle is taken from the vertical or horizontal. Any help is appreciated! George (down under) ------=_NextPart_000_000B_01C9FA28.914D06F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Ed,
Bernie's comments on weird have = prompted me to=20 start my investigation on a round radiator, PWR locally has an engineer = who is=20 interested in my ideas and we may move to develop a = prototype.
It seems the easiest way to manufacture = this type=20 of radiator is along the lines of the stacker radiator, used mostly = for=20 water to oil  and are very efficient for this purpose. I've seen = where=20 people are using them for radiators in racing. To optimize the = suitability for=20 my application the air flow channels would be modified for reasons of = maximum=20 surface area, turbulence etc.
 
Naturally a round radiator need to be = thinner=20 rather than thicker ( unlike the round intercoolers). In my design the = air flows=20 from the centre outwardly and taken back toward a butterfly to control = the exit=20 air flow.
 
The inlet would need to be shaped  = to maximize=20 pressure as would the internals. I can't easily explain everything but I = would=20 appreciate some help with sizing fore hp etc. I do have notes on the = subject and=20 will have to find them again but I think a rule of thumb is either 3 sq" = per hp=20 or 3 cu" per hp and radiator incidence in excess of 55 deg and if the = angle is=20 taken from the vertical or horizontal.
Any help is appreciated!
George (down under)
 
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