X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 10 Aug 2009 21:57:26 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m27.mx.aol.com ([64.12.137.8] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3801418 for lml@lancaironline.net; Mon, 10 Aug 2009 21:39:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.8; envelope-from=VTAILJEFF@aol.com Received: from imo-ma03.mx.aol.com (imo-ma03.mx.aol.com [64.12.78.138]) by imo-m27.mx.aol.com (8.14.1/8.14.1) with ESMTP id n7B1FAUp029765 for ; Mon, 10 Aug 2009 21:15:11 -0400 (EDT) Received: from VTAILJEFF@aol.com by imo-ma03.mx.aol.com (mail_out_v40_r1.5.) id q.d1c.49ad4dca (37036) for ; Mon, 10 Aug 2009 21:15:06 -0400 (EDT) Received: from smtprly-mc02.mx.aol.com (smtprly-mc02.mx.aol.com [64.12.95.98]) by cia-db02.mx.aol.com (v124.15) with ESMTP id MAILCIADB026-d3d04a80c6161c0; Mon, 10 Aug 2009 21:15:05 -0400 Received: from FWM-M28 (fwm-m28.webmail.aol.com [64.12.193.230]) by smtprly-mc02.mx.aol.com (v124.15) with ESMTP id MAILSMTPRLYMC022-d3d04a80c6161c0; Mon, 10 Aug 2009 21:15:02 -0400 References: X-Original-To: lml@lancaironline.net Subject: Re: [LML] Re: L4P #5 cooling and 220flameout update X-Original-Date: Mon, 10 Aug 2009 21:15:02 -0400 X-AOL-IP: 66.220.116.190 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: vtailjeff@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CBE83849A65688_1F50_1A51_FWM-M28.sysops.aol.com" X-Mailer: AOL Webmail 43792-STANDARD Received: from 66.220.116.190 by FWM-M28.sysops.aol.com (64.12.193.230) with HTTP (WebMailUI); Mon, 10 Aug 2009 21:15:02 -0400 X-Original-Message-Id: <8CBE83849980884-1F50-CF4@FWM-M28.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CBE83849A65688_1F50_1A51_FWM-M28.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Bill, I will send you the info on #5 when I get home next week. Jeff Edwards -----Original Message----- From: marv@lancair.net To: lml Sent: Mon, Aug 10, 2009 2:15 pm Subject: [LML] Re: L4P #5 cooling and 220flameout update Posted for William Miller : ?Q1. What is the best source for the #5 baffle mod? ?Q2, Are there any published reports or flight tests? ?Q3. I saw Fred Moreno mentioned a 5 document .pdf on plenums and pressures but cannot find it on the list or archives. [It's at the bottom of the "Tips & Tricks" page on the LML website? ? ] ?Q4. Is there a similar report or flight test on exhaust tunnel extensions. ?Q5. Can that big fat landing light disrupt cooling airflow on the right side: CHT #5 and #1 hot, and worse at high altitude? ? ?Update: ??It was great to see everyone at OSH. I learned that a senior experienced L4P pilot switches tanks every five minutes during climbout. This caused me to think of DYNAMIC pressures across the fuel vent lines. I removed one, then the other check valve, in the wingtips and discovered a restricted flow ?by applying pulmonary ?pressure. Since I could not produce a pressure vs flow rate graph at OSH I took a poll of assembled experts and a few agreed with me that the restriction could ?not keep up with 40gal/hr? ~= 42 cc/sec. I bought some larger tubing at the fly mart and? installed it on the flight line at OSH. Security is very good. I got to talk to several patrols to make sure I was working on my own airplane:) ??Based on the good advice from the same guy who switches tanks in climb, I took a suggested detour to 4R4 Fairhope, Alabama to visit TCM customer service. They found a timing advance of 2 degrees and a low reading fuel flow on my gage by about 15%. These adjustments have solved most cooling issues in climb and low altitude, but my #5 is still running very(30-40 deg) hotter at 65-75% ROP and 55-65% LOP and high altitude > FL220. I plan to remove the landing light from in front of #5, then install the mod to the baffle if needed. Then check upper pressures and outflow. -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html ----------MB_8CBE83849A65688_1F50_1A51_FWM-M28.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Bill,

I will send you the info on #5 when I get home next week.

Jeff Edwards



-----Original Message-----
From: marv@lancair.net
To: lml
Sent: Mon, Aug 10, 2009 2:15 pm
Subject: [LML] Re: L4P #5 cooling and 220flameout update







Posted for William Miller <cwfmd@yahoo.com>:

 Q1. What is the best source for the #5 baffle mod?
 Q2, Are there any published reports or flight tests?
 Q3. I saw Fred Moreno mentioned a 5 document .pdf on plenums and pressures
but cannot find it on the list or archives.
[It's at the bottom of the "Tips & Tricks" page on the LML website  <M>  ]
 Q4. Is there a similar report or flight test on exhaust tunnel extensions.
 Q5. Can that big fat landing light disrupt cooling airflow on the right side:
CHT #5 and #1 hot, and worse at high altitude?
 
 Update:
  It was great to see everyone at OSH. I learned that a senior experienced L4P
pilot switches tanks every five minutes during climbout. This caused me to
think of DYNAMIC pressures across the fuel vent lines. I removed one, then the
other check valve, in the wingtips and discovered a restricted flow
 by applying pulmonary
 pressure. Since I could not produce a pressure vs flow rate graph at OSH I
took a poll of assembled experts and a few agreed with me that the restriction
could
 not keep up with 40gal/hr  ~= 42 cc/sec. I bought some larger tubing at the
fly mart and  installed it on the flight line at OSH. Security is very good. I
got to talk to several patrols to make sure I was working on my own airplane:)
  Based on the good advice from the same guy who switches tanks in climb, I
took a suggested detour to 4R4 Fairhope, Alabama to visit TCM customer
service. They found a timing advance of 2 degrees and a low reading fuel flow
on my gage by about 15%. These adjustments have solved most cooling issues in
climb and low altitude, but my #5 is still running very(30-40 deg) hotter at
65-75% ROP and 55-65% LOP and high altitude > FL220. I plan to remove the
landing light from in front of #5, then install the mod to the baffle if
needed. Then check upper pressures and outflow.
----------MB_8CBE83849A65688_1F50_1A51_FWM-M28.sysops.aol.com--