X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d23.mx.aol.com ([205.188.139.137] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3741502 for flyrotary@lancaironline.net; Wed, 01 Jul 2009 11:58:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.137; envelope-from=WRJJRS@aol.com Received: from imo-ma02.mx.aol.com (imo-ma02.mx.aol.com [64.12.78.137]) by imo-d23.mx.aol.com (v107.10) with ESMTP id RELAYIN1-24a4b8760224; Wed, 01 Jul 2009 11:57:20 -0400 Received: from WRJJRS@aol.com by imo-ma02.mx.aol.com (mail_out_v40_r1.5.) id q.cf4.54b34d56 (37554) for ; Wed, 1 Jul 2009 11:57:11 -0400 (EDT) Received: from smtprly-mb02.mx.aol.com (smtprly-mb02.mx.aol.com [64.12.207.149]) by cia-mb03.mx.aol.com (v124.15) with ESMTP id MAILCIAMB033-5c644a4b875410; Wed, 01 Jul 2009 11:57:11 -0400 Received: from webmail-db04 (webmail-db04.webmail.aol.com [205.188.105.69]) by smtprly-mb02.mx.aol.com (v124.15) with ESMTP id MAILSMTPRLYMB022-5c644a4b875410; Wed, 01 Jul 2009 11:57:08 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Round Radiators Date: Wed, 01 Jul 2009 11:57:08 -0400 X-AOL-IP: 64.12.78.137 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CBC87BB9006E87_106C_D34_webmail-db04.sysops.aol.com" X-Mailer: AOL Webmail 43661-STANDARD Received: from 66.253.96.220 by webmail-db04.sysops.aol.com (205.188.105.69) with HTTP (WebMailUI); Wed, 01 Jul 2009 11:57:08 -0400 Message-Id: <8CBC87BB8F9475E-106C-672@webmail-db04.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CBC87BB9006E87_106C_D34_webmail-db04.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" George, 2-3 CUBIC inches per HP is the general rule. Bill Jepson -----Original Message----- From: George Lendich To: Rotary motors in aircraft Sent: Tue, Jun 30, 2009 3:47 pm Subject: [FlyRotary] Round Radiators 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) ? ----------MB_8CBC87BB9006E87_106C_D34_webmail-db04.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" George,
2-3 CUBIC inches per HP is the general rule.
Bill Jepson


-----Original Message-----
From: George Lendich <lendich@aanet.com.au>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, Jun 30, 2009 3:47 pm
Subject: [FlyRotary] Round Radiators


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)
 
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