X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d20.mx.aol.com ([205.188.139.136] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1074460 for flyrotary@lancaironline.net; Thu, 20 Apr 2006 11:22:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.136; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-d20.mx.aol.com (mail_out_v38_r7.5.) id q.3b5.df0987 (4214) for ; Thu, 20 Apr 2006 11:21:40 -0400 (EDT) From: WRJJRS@aol.com Message-ID: <3b5.df0987.31790103@aol.com> Date: Thu, 20 Apr 2006 11:21:39 EDT Subject: Re: [FlyRotary] need radiator area formula.. from midwinter flyin.. To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1145546499" X-Mailer: 9.0 SE for Windows sub 5027 X-Spam-Flag: NO -------------------------------1145546499 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/19/2006 10:57:38 PM Pacific Standard Time, Dastaten@earthlink.net writes: After searching my notes and archives, I am unable to find it.. but at Bill Eslick's get-together, one of the presentations dealt with cooling, and some formulae were presented with regards to required area (per hp i think) and I want to run my numbers on this end to get a feel for what I am up against. If anyone has that formula handly, or those files/attachments that dealt with this subject, please post them here... or mail to me directly. Dave Staten Dave, I didn't attend Bill's get-together but can pass along some basic requirements. The long standing rule of thumb has been 2 cubic inches of radiator per HP. Depending of the quality of the ducting you can vary that up or down. Obviously poor ducting requires more area, and proper ducting can reduce the required area. Don't plan on less unless you can test well before flight. Bill Jepson -------------------------------1145546499 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 4/19/2006 10:57:38 PM Pacific Standard Time,=20 Dastaten@earthlink.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>After=20 searching my notes and archives, I am unable to find it.. but at
Bill=20 Eslick's get-together, one of the presentations dealt with cooling,
an= d=20 some formulae were presented with regards to required area (per hp i=20
think) and I want to run my numbers on this end to get a feel for what= I=20
am up against.

If anyone has that formula handly, or those=20 files/attachments that dealt
with this subject, please post them here.= ..=20 or mail to me directly.

Dave Staten
Dave, I didn't attend Bill's get-together but can pass along some basic= =20 requirements. The long standing rule of thumb has been 2 cubic inches of=20 radiator per HP.  Depending of the quality of the ducting you can vary=20= that=20 up or down. Obviously poor ducting requires more area, and proper ducting ca= n=20 reduce the required area. Don't plan on less unless you can test well before= =20 flight.
Bill Jepson
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