X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from s200aog16.obsmtp.com ([207.126.144.130] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with SMTPS id 2785541 for flyrotary@lancaironline.net; Mon, 10 Mar 2008 13:30:05 -0400 Received-SPF: none receiver=logan.com; client-ip=207.126.144.130; envelope-from=jefferson.owen@st.com Received: from source ([167.4.1.35]) (using TLSv1) by eu1sys200aob016.postini.com ([207.126.147.11]) with SMTP; Mon, 10 Mar 2008 17:29:22 UTC Received: from zeta.dmz-us.st.com (ns4.st.com [167.4.80.115]) by beta.dmz-us.st.com (STMicroelectronics) with ESMTP id CFB0CDB11 for ; Mon, 10 Mar 2008 17:29:21 +0000 (GMT) Received: from mail1.snj.st.com (mail1.snj.st.com [167.4.202.26]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 7B6D648C8D for ; Mon, 10 Mar 2008 17:29:21 +0000 (GMT) Received: from SNJ10008358 ([167.4.204.157]) by mail1.snj.st.com (MOS 3.7.5a-GA) with ESMTP id CJQ06104 (AUTH "jefferson owen"); Mon, 10 Mar 2008 10:29:19 -0700 (PDT) Received: from SNJ10008358 by SNJ10008358 (PGP Universal service); Mon, 10 Mar 2008 10:29:19 -0800 X-PGP-Universal: processed; by SNJ10008358 on Mon, 10 Mar 2008 10:29:19 -0800 From: Jefferson E OWEN To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Anyone have an RD-1C for sale? Date: Mon, 10 Mar 2008 10:29:19 -0700 Message-ID: <011401c882d4$46015830$9dcc04a7@snj.st.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0115_01C88299.99A28030" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AciBNU+saxwF6R8SRrW8zT/DtsY7BABnR0oA In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 This is a multi-part message in MIME format. ------=_NextPart_000_0115_01C88299.99A28030 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Rusty, My reading of the article says that the duct is fixed and they are simply changing the angle of the radiator and increasing the area to fill the available space at a given angle. This says that for angles near 90 degrees there is little change in area and therefore the flow loss is not compensated. The opposite case where the radiator is nearer parallel to the airflow, the change in airflow is probably minimal (since the air is making an almost 90 degree angle direction change) but the area of the radiator increases dramaticly with only small changes in angle. This would explain the graph shown. Jeff _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy Sent: Saturday, March 08, 2008 8:58 AM To: Rotary motors in aircraft Subject: [FlyRotary] Anyone have an RD-1C for sale? Greetings, If anyone has an RD-1C for sale, I may be interested in buying it. I've got one (yes another one) on order with Tracy, but the production date is way out there in October. If someone has one available sooner, at a lower price, I'd certainly be interested. Cheers, Rusty (single rotor still possible for RV-3) ------=_NextPart_000_0115_01C88299.99A28030 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Rusty,
 
My reading of the article says that the duct is fixed and they = are simply=20 changing the angle of the radiator and increasing the area to fill the = available=20 space at a given angle.  This says that for angles near = 90 degrees=20 there is little change in area and therefore the flow loss is not=20 compensated.  The opposite case where the radiator is nearer = parallel to=20 the airflow, the change in airflow is probably minimal (since the air is = making=20 an almost 90 degree angle direction change) but the area of the radiator = increases dramaticly with only small changes in angle.  This would = explain=20 the graph shown.
 
Jeff

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Russell=20 Duffy
Sent: Saturday, March 08, 2008 8:58 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Anyone have an RD-1C = for=20 sale?

Greetings,
 
If anyone has = an RD-1C for=20 sale, I may be interested in buying it.  I've got one (yes another = one) on=20 order with Tracy, but the production date is way out there in=20 October.  If someone has one available sooner, at a lower price, = I'd=20 certainly be interested. 
 
Cheers,
Rusty (single = rotor still=20 possible for RV-3)
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