X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 13 Sep 2006 09:14:32 -0400 Message-ID: X-Original-Return-Path: Received: from secure5.liveoakhosting.com ([64.49.254.21] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTPS id 1400044 for lml@lancaironline.net; Tue, 12 Sep 2006 19:02:41 -0400 Received-SPF: none receiver=logan.com; client-ip=64.49.254.21; envelope-from=walter@advancedpilot.com Received: (qmail 20306 invoked from network); 12 Sep 2006 18:02:00 -0500 Received: from ip-69-33-213-234.dfw.megapath.net (HELO ?192.168.0.83?) (69.33.213.234) by rs5.liveoakhosting.com with SMTP; 12 Sep 2006 18:02:00 -0500 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-2--593633920 X-Original-Message-Id: <9799341F-6FA7-4B42-AEC7-7BACA827B1C0@advancedpilot.com> From: Walter Atkinson Subject: Re: [LML] Backfires LOP X-Original-Date: Tue, 12 Sep 2006 18:03:12 -0500 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.2) --Apple-Mail-2--593633920 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed You don't tell us how far LOP 1590dF put him, but I'm guessing that he simply was so far LOP that as soon as the rain messed up the F:A ratios, he had a cylinder or two not fire on one stroke. The result was a light off of the fuel in the hot exhaust. (it wasn't a backfire, it was an afterfire.) Walter On Sep 12, 2006, at 5:55 PM, phil s wrote: Anyone had experience with this? Pilot flying our IVP (TSIO550E3B with 4 blade MT) and reports: "Had backfires(?) couple of nights back. Was running lean of peak with temps 1590 at FL150, around -15C, light rain, 29Hg 2500rpm . Happened twice so went rich of peak for remainder of flight with no problems. Any reason come to mind?" Be grateful for any thoughts Phil Sexton Melbourne --Apple-Mail-2--593633920 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 You don't tell us how far LOP = 1590dF put him, but I'm guessing that he simply was so far LOP that as = soon as the rain messed up the F:A ratios, he had a cylinder or two not = fire on one stroke.=A0 The result was a light off of the fuel in the hot = exhaust.=A0 (it wasn't a backfire, it was an afterfire.)

Walter



On Sep 12, 2006, = at 5:55 PM, phil s wrote:

=


Anyone had experience with this?
= Pilot flying our IVP (TSIO550E3B with 4 blade MT) and reports:
"Had = backfires(?) couple of nights back. Was running lean of peak with =A0
= temps 1590 at FL150, around -15C, light rain, =A029Hg 2500rpm .
= Happened twice so went rich of peak for remainder of flight with no = =A0
problems. Any reason come to mind?"
Be grateful for any = thoughts

Phil Sexton
Melbourne
 =

= --Apple-Mail-2--593633920--