X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 26 Mar 2009 20:14:10 -0400 Message-ID: X-Original-Return-Path: Received: from bay0-omc3-s16.bay0.hotmail.com ([65.54.246.216] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3559726 for lml@lancaironline.net; Wed, 25 Mar 2009 15:49:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.216; envelope-from=gt_phantom@hotmail.com Received: from hotmail.com ([10.12.232.144]) by bay0-omc3-s16.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 25 Mar 2009 12:48:30 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 25 Mar 2009 12:48:25 -0700 X-Original-Message-ID: Received: from 68.211.166.92 by COL0-DAV6.phx.gbl with DAV; Wed, 25 Mar 2009 19:48:22 +0000 X-Originating-IP: [68.211.166.92] X-Originating-Email: [gt_phantom@hotmail.com] X-Sender: gt_phantom@hotmail.com X-Original-Message-ID: <49CA8A8F.9070808@hotmail.com> X-Original-Date: Wed, 25 Mar 2009 15:48:31 -0400 From: GT Phantom Reply-To: gt_phantom@hotmail.com Organization: None User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Poor Slow-flight Cooling Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 25 Mar 2009 19:48:25.0822 (UTC) FILETIME=[A98577E0:01C9AD82] X-Original-Return-Path: gt_phantom@hotmail.com Hi all,

I have a Lancair 320 (IO-320) which I am just starting to fly "for real" following 18 months of paint / renovations / panel upgrades since purchase.

During climb / cruise / descent all temps are as expected; however in slow flight oil temps rise rapidly even at moderate power settings. Never saw anything like this in my previous plane, a Lancair 235. In the pattern on a "nice" day, if the downwind is extended significantly while gear is down oil temps approach the red by the time I land.

Air supply for the oil cooler comes from the aft left side of the aft engine baffle (3" hose around an oval exit), with an additional air feed (1 1/2" hose) coming from a small NACA duct on the left side of the cowl. Oil cooler is mounted low on the left side of the firewall; air exits down into the low pressure area just above the air exit space by the exhaust pipe.

Is this a common problem on the 320? Is there a good fix?

Thanks,

Bill Reister
N351E