X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail10.syd.optusnet.com.au ([211.29.132.191] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTPS id 2490938 for flyrotary@lancaironline.net; Fri, 16 Nov 2007 00:25:35 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.191; envelope-from=lendich@optusnet.com.au Received: from george (d211-29-164-150.dsl.nsw.optusnet.com.au [211.29.164.150]) by mail10.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id lAG5OmBa001281 for ; Fri, 16 Nov 2007 16:24:49 +1100 Message-ID: <004a01c82811$02bdfe20$96a41dd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Cowling Airflow Date: Fri, 16 Nov 2007 15:24:49 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0047_01C82864.D3B4EEF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0047_01C82864.D3B4EEF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have been thinking about how I want to try and flow the air through = my Sam James "Rotary Cowling" and I am wondering what you all thought = about the possibility of creating some "bypass" air to help accelerate = the airflow out of the engine before it re-enters the airflow along the = belly of the aircraft. =20 I also was wondering if there might be some advantage during ground = operations and climb out if I install some kind of door as seen in the = diagram... Doug Lomheim RV-9A, FWF...contemplating the placement of stuff...=20 Doug, Hot air rises - that's for sure! but from my knowledge that's a high = pressure area and would more than likely push air into the cowl. As far as air by-pass, I've not heard of that before, it sounds like = it might create pressure at the back of the radiator restricting flow = through the radiator; unless it was an exhaust augmenter which creates a = low pressure area and sucks on the radiator exit. This has been done = successfully by many. George ( down under) -------------------------------------------------------------------------= ----- See what's new at AOL.com and Make AOL Your Homepage. -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.503 / Virus Database: 269.15.33/1133 - Release Date: = 15/11/2007 8:57 PM ------=_NextPart_000_0047_01C82864.D3B4EEF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
I have been thinking about how I want to try and flow the air = through my=20 Sam James "Rotary Cowling" and I am wondering what you all thought = about the=20 possibility of creating some "bypass" air to help accelerate the = airflow=20 out of the engine before it re-enters the airflow along the belly of = the=20 aircraft. 
 
I also was wondering if there might be some advantage during = ground=20 operations and climb out if I install some kind of door as seen = in the=20 diagram...
 
Doug Lomheim
RV-9A, FWF...contemplating the placement of stuff... 
 
Doug,
Hot air rises - that's for sure! but from my knowledge that's a = high=20 pressure area and would more than likely push air into the cowl.
 
As far as air by-pass, I've not heard of that before, it sounds = like it=20 might create pressure at the back of the radiator restricting flow = through the=20 radiator; unless it was an exhaust augmenter which creates a low = pressure area=20 and sucks on the radiator exit. This has been done successfully by = many.
George ( down under)



See what's new at AOL.com=20 and Make AOL Your Homepage.

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Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:  =20 http://mail.lancaironline.net:81/lists/flyrotary/List.html

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.503 / Virus Database: 269.15.33/1133 - = Release Date:=20 15/11/2007 8:57 PM
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