X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Fri, 15 Sep 2006 19:01:25 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1404294 for lml@lancaironline.net; Fri, 15 Sep 2006 06:54:17 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=rtitsworth@mindspring.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=mindspring.com; b=O6AjfJuVqTIuFg+gtsP+BlxugpOZaEiSMGTwkkLazHmkif8DbOoNCHuEYokEi4Ob; h=Received:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:In-Reply-To:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [68.40.94.44] (helo=RDTVAIO) by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1GOBKC-0007fv-8v for lml@lancaironline.net; Fri, 15 Sep 2006 06:53:36 -0400 From: "rtitsworth" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Backfires LOP X-Original-Date: Fri, 15 Sep 2006 06:53:21 -0400 X-Original-Message-ID: <016701c6d8b5$29981230$84affea9@RDTVAIO> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0168_01C6D893.A2867230" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcbYA6Hwy4jIRgWgTPG1SHhYpd7megAsLyFA In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-ELNK-Trace: b17f11247b2ac8f0a79dc4b33984cbaa0a9da525759e26546532d7e140772fe03d73aff08a934fb38483c75118a9a15a350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 68.40.94.44 This is a multi-part message in MIME format. ------=_NextPart_000_0168_01C6D893.A2867230 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Jim, I've seen many pictures of your plane - beautiful. Any data on the (nominal) LOP CHT's associated with the cylinders that failed? How many degrees LOP? My understanding is that more lean is generally better (i.e. cooler) - at least on the margin (i.e. you're best to be either rich enough or lean enough. Peak is square is the red box) What engine monitor do you use? Rick ES: TSIO-550 building _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of JIMRHER@aol.com Sent: Thursday, September 14, 2006 9:42 AM To: Lancair Mailing List Subject: [LML] Backfires LOP Phil 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 Phil; I have had one backfire (afterfire) that got my attention while going LOP. I have a 4P with TISO 550E. I had about 30 hrs on a new overhaul and was just going to test it LOP. Previously, I had 300 hrs on the 4P with about 50 of those hours LOP. So when I tried it, just like in the past, it gave one big pop. I didn't try that again. But while looking for why I had a strange vibration in this new engine I found that one injector had a piece of dirt in it and it caused the EGT for that cylinder to run slightly higher than the others while ROP. After cleaning the injectors the vibration was gone and the LOP works correctly again. Without GAMI's, which I should have anyway. The engine will pop if too lean, and in this case one cylinder got too lean. I wouldn't just accept that this would not do any harm. I have heard of very bad things happening if it blows off a hose from the Turbo. Like loss of pressurization, engine stopping and won't start at that high altitude, etc. As a side bar, I don't run LOP anymore unless I need to stretch the range. This after replacing all 6 cylinders at 215 hrs from new and then the second set after only 82 hrs. Both times the exhaust valve stems and guides were out of serviceable tolerance. This could be a very long thread but will have to wait. Also, I lost one Mag, from water in the cap from pressurization moisture, just like Carl Cadwell said. But mine didn't show up in the air, it just wouldn't work on the next flight Mag, check. I have since Inspected the Mag. every 100 hrs. There is a very small weeping drain hole in the high voltage cavity that can and did get plugged. For what it's worth, Jim Hergert L4P, N6XE (An Sexy) 408 hrs. ------=_NextPart_000_0168_01C6D893.A2867230 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Jim,

I’ve seen many pictures of = your plane – beautiful.

 

Any data on the (nominal) LOP = CHT’s associated with the cylinders that failed?

How many degrees LOP?  My understanding is that more lean is generally better (i.e. cooler) = – at least on the margin (i.e. you’re best to be either rich enough or lean enough.  Peak is square is the red = box)

What engine monitor do you = use?

 

Rick

ES: TSIO-550 = building

 

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of JIMRHER@aol.com
Sent: Thursday, September = 14, 2006 9:42 AM
To: Lancair Mailing List
Subject: [LML] Backfires = LOP

 

Phil 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

=

 

Phil;

 

I have had one backfire (afterfire) that got my attention while going = LOP. I have a 4P with TISO 550E. I had about 30 hrs on a new overhaul and was = just going to test it LOP. Previously, I had 300 hrs on the 4P with about 50 = of those hours LOP. So when I tried it, just like in the past, it gave one = big pop. I didn't try that again. But while looking for why I had a strange vibration in this new engine I found that one injector had a piece of = dirt in it and it caused the EGT for that cylinder to run slightly higher than = the others while ROP. After cleaning the injectors the vibration was gone = and the LOP works correctly again. Without GAMI's, which I should have = anyway. The engine will pop if too lean, and in this case one cylinder got too = lean. I wouldn't just accept that this would not do any harm. I have heard of = very bad things happening if it blows off a hose from the Turbo. Like loss of pressurization, engine stopping and won't start at that high altitude, = etc.

 

As a side bar, I don't run LOP anymore unless I need to stretch the range. = This after replacing all 6 cylinders at 215 hrs from new and then the second = set after only 82 hrs. Both times the exhaust valve stems and guides were = out of serviceable tolerance. This could be a very long thread but will have to = wait.

 

Also, I lost one Mag, from water in the cap from pressurization moisture, just = like Carl Cadwell said. But mine didn't show up in the air, it just wouldn't = work on the next flight Mag, check. I have since Inspected the Mag. every 100 = hrs. There is a very small weeping drain hole in the high voltage cavity that = can and did get plugged.

 

For what it's worth,

Jim Hergert
L4P, N6XE
(An Sexy)
408 hrs.

------=_NextPart_000_0168_01C6D893.A2867230--