X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 25 Apr 2007 10:59:06 -0400 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2003609 for lml@lancaironline.net; Wed, 25 Apr 2007 08:58:16 -0400 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 25 Apr 2007 07:57:18 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAAPjsLkZAMf4VeWdsb2JhbACDB40IAQEJDio X-IronPort-AV: i="4.14,450,1170655200"; d="scan'208,217"; a="10396520:sNHT103703054" Received: (qmail 9803 invoked from network); 25 Apr 2007 07:57:18 -0500 Received: from 216-107-97-170.wan.networktel.net (HELO ?10.0.1.3?) (216.107.97.170) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 25 Apr 2007 07:57:18 -0500 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--517368646 X-Original-Message-Id: From: Walter Atkinson Subject: Re: [LML] Cooling Drag X-Original-Date: Wed, 25 Apr 2007 07:56:50 -0500 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--517368646 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Art: Wow, you've done quite a good job. Yes, we've worked with that, too. It seems as though the most effective action is to streamline the exit air and improve the deltaP. It's about the only thing we see that makes enough difference to be worth the effort. It really helps to reduce inlet air to the point that you let no more air INTO the cowl than necessary to do the job of cooling. Walter On Apr 24, 2007, at 5:18 PM, Art Bertolina wrote: I have used most of the ideas from George Braly engine cooling seminar of Oct/04 for TSIO 550 installations in L IVs. Over the last several months flying in So. Calif. at 15500 to 17500 at 2500RPM and 31" MAP and 19gph in cruise CHTs run from 264 to 305 oil temp 160 hottest TIT 1595, 80 to 90 LOP. Has anyone done any work with cooling drag. Directing the air flow above the engine has a positive effect, has anyone tried to direct the air flow as it exits the bottom of the engine?, if so with what effect?. Tried closing down the exit area and again with any positive effect. Thoughts and comments would be appreciated. Art --Apple-Mail-1--517368646 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 Art:

Wow, you've done quite a = good job.

Yes, we've worked with = that, too.=A0 It seems as though the most effective action is to = streamline the exit air and improve the deltaP.=A0 It's about the only = thing we see that makes enough difference to be worth the effort.=A0 It = really helps to reduce inlet air to the point that you let no more air = INTO the cowl than necessary to do the job of cooling.

Walter


On Apr 24, = 2007, at 5:18 PM, Art Bertolina wrote:

=A0
I have used most of the ideas=A0from George = Braly=A0engine
cooling seminar of Oct/04 for TSIO 550 installations = in
Has anyone done any work with cooling drag. Directing = the
down the exit area and = again with any positive effect.
Thoughts and comments = would be appreciated.
Art=A0=A0=A0=A0


= --Apple-Mail-1--517368646--