X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 14 Mar 2009 07:32:47 -0400 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3546074 for lml@lancaironline.net; Fri, 13 Mar 2009 08:05:42 -0400 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AnoCAEPpuUlAMf4VgWdsb2JhbACCJSySZQEBFiK6H4N+Bg Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 13 Mar 2009 07:05:05 -0500 Received: (qmail 25910 invoked from network); 13 Mar 2009 07:05:05 -0500 Received: from ip12-197-248-25.networkusa.com (HELO ?10.0.1.2?) (12.197.248.25) by advancedpilot.com with (AES128-SHA encrypted) SMTP; 13 Mar 2009 07:05:05 -0500 X-Original-Message-Id: <57A8F91B-E3B3-431F-AE64-6233D25C07D8@advancedpilot.com> From: Walter Atkinson X-Original-To: "Lancair Mailing List" In-Reply-To: Content-Type: multipart/alternative; boundary=Apple-Mail-1-940665897 Mime-Version: 1.0 (Apple Message framework v930.3) Subject: Re: [LML] Reduced Fuel Flow X-Original-Date: Fri, 13 Mar 2009 07:05:03 -0500 References: X-Mailer: Apple Mail (2.930.3) --Apple-Mail-1-940665897 Content-Type: text/plain; charset=WINDOWS-1252; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable Vapor lock in a fast climb to altitude is a common problem in TC'd =20 aircraft and can even be a problem in high performance NA aircraft. =20 That's why we recommend turning on the boost pump in most of these =20 applications as one passes through 10,000 feet in a climb. We also =20 recommend leaving the boost pump on for at least 30 min. after =20 reaching cruise altitude so the fuel in the tanks can cool off and =20 will no longer be subject to vapor lock. Vapor lock essentially leans =20= the mixture and will be noted by a rising EGT/TIT in the climb--even =20 wit the mixture remaining full rich. Walter On Mar 13, 2009, at 5:07 AM, farnsworth wrote: Dr Katz, About a year ago I had a similar problem with fuel flow reduction =20 during climb. It would cause increased temperature problems at the =20 same altitudes (14 to 15,000=92). It turned out that I needed to have my fuel pump recalibrated by TCM =20 in Mobile. During this period I found I could increase the fuel flow =20 about 5 GPH by turning on the high boost pump. You might want to turn =20= on the high boost pump around 12,000=92 and see if this doesn=92t allow =20= you to climb above 14,000=92 without the CHTs going up. Lynn Farnsworth Super Legacy #235 TSIO-550 Powered Race #44 --Apple-Mail-1-940665897 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Vapor lock in a fast climb to = altitude is a common problem in TC'd aircraft and can even be a problem = in high performance NA aircraft.  That's why we recommend turning = on the boost pump in most of these applications as one passes through = 10,000 feet in a climb.  We also recommend leaving the boost pump = on for at least 30 min. after reaching cruise altitude so the fuel in = the tanks can cool off and will no longer be subject to vapor lock. =  Vapor lock essentially leans the mixture and will be noted by a = rising EGT/TIT in the climb--even wit the mixture remaining full = rich.

Walter


On Mar 13, 2009, at 5:07 AM, farnsworth wrote:

 
Dr = Katz,
 
About a = year ago I had a similar problem with fuel flow reduction during climb. = It would cause increased temperature problems at the same altitudes (14 = to 15,000=92).
It turned out that I needed to have my fuel pump = recalibrated by TCM in Mobile. During = this period I found I could increase the fuel flow about 5 GPH by = turning on the high boost pump. You might want to turn on the high boost = pump around 12,000=92 and see if this doesn=92t allow you to climb above = 14,000=92 without the CHTs going up.
Lynn Farnsworth
Super = Legacy #235
TSIO-550 Powered
Race = #44
=

= --Apple-Mail-1-940665897--