X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 13 Sep 2006 09:17:40 -0400 Message-ID: X-Original-Return-Path: Received: from mail.pshift.com ([63.166.217.30] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1400323 for lml@lancaironline.net; Tue, 12 Sep 2006 22:14:01 -0400 Received-SPF: none receiver=logan.com; client-ip=63.166.217.30; envelope-from=colyncase@earthlink.net Received: from ccaselt (unverified [216.57.118.191]) by mail.pshift.com (Vircom SMTPRS 4.35.480.0) with SMTP id for ; Tue, 12 Sep 2006 22:13:20 -0400 X-Modus-BlackList: 216.57.118.191=OK;colyncase@earthlink.net=OK X-Modus-RBL: 216.57.118.191=OK X-Modus-Trusted: 216.57.118.191=NO X-Original-Message-ID: <548701c6d6da$28e24590$5e11020a@nvidia.com> From: "colyncase on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Backfires LOP X-Original-Date: Tue, 12 Sep 2006 19:13:09 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_5484_01C6D69F.7C359BB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_5484_01C6D69F.7C359BB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Backfires LOPI would guess an ignition problem. If neither plug fires there would be unburned fuel in the cylinder. LOP requires a better spark than "somewhat" ROP which is what most = people mean by ROP. An LOP mag check at altitude will tell. APS has opinions how to do = that.. =20 ----- Original Message -----=20 From: phil s=20 To: Lancair Mailing List=20 Sent: Tuesday, September 12, 2006 3:55 PM Subject: [LML] Backfires LOP 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 = =20 temps 1590 at FL150, around -15C, light rain, 29Hg 2500rpm . Happened twice so went rich of peak for remainder of flight with no =20 problems. Any reason come to mind?" Be grateful for any thoughts Phil Sexton Melbourne ------=_NextPart_000_5484_01C6D69F.7C359BB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Backfires LOP
I would guess an ignition = problem.
If neither plug fires there would be = unburned fuel=20 in the cylinder.
 
LOP requires a better spark than = "somewhat" ROP=20 which is what most people mean by ROP.
An LOP mag check at altitude will = tell.  APS=20 has opinions how to do that..  =20
----- Original Message -----
From:=20 phil=20 s
Sent: Tuesday, September 12, = 2006 3:55=20 PM
Subject: [LML] Backfires = LOP



Anyone had experience with this?
Pilot = flying=20 our IVP (TSIO550E3B with 4 blade MT) and reports:
"Had backfires(?) = couple=20 of nights back. Was running lean of peak with  
temps 1590 at = FL150,=20 around -15C, light rain,  29Hg 2500rpm .
Happened twice so = went rich=20 of peak for remainder of flight with no  
problems. Any reason = come to=20 mind?"
Be grateful for any thoughts

Phil=20 Sexton
Melbourne
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