X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 15 Mar 2009 18:53:14 -0400 Message-ID: X-Original-Return-Path: Received: from [64.12.137.6] (HELO imo-m25.mail.aol.com) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3547306 for lml@lancaironline.net; Sat, 14 Mar 2009 10:34:09 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.6; envelope-from=VTAILJEFF@aol.com Received: from VTAILJEFF@aol.com by imo-m25.mx.aol.com (mail_out_v39.1.) id q.c09.5810e1ed (48576) for ; Sat, 14 Mar 2009 10:33:36 -0400 (EDT) From: VTAILJEFF@aol.com X-Original-Message-ID: X-Original-Date: Sat, 14 Mar 2009 10:33:31 EDT Subject: Re: [LML] Re: Reduced Fuel Flow X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1237041211" X-Mailer: AOL 9.1 sub 5003 X-Spam-Flag:NO -------------------------------1237041211 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en or for those of you who like to keep things simple -- turn it on after star= t=20 and turn it off before shut down. =20 Jeff=20 1200+ hours on a boost pump =20 =20 In a message dated 3/14/2009 6:33:09 A.M. Central Daylight Time, =20 walter@advancedpilot.com writes: Vapor lock in a fast climb to altitude is a common problem in TC'd aircraft= =20 and can even be a problem in high performance NA aircraft. That's why we =20 recommend turning on the boost pump in most of these applications as one pa= sses=20 through 10,000 feet in a climb. We also recommend leaving the boost pump o= n=20 for at least 30 min. after reaching cruise altitude so the fuel in the tank= s=20 can cool off and will no longer be subject to vapor lock. Vapor lock=20 essentially leans the mixture and will be noted by a rising EGT/TIT in the=20 climb--even wit the mixture remaining full rich. =20 Walter On Mar 13, 2009, at 5:07 AM, farnsworth wrote: =20 Dr Katz, =20 About a year ago I had a similar problem with fuel flow reduction during=20 climb. It would cause increased temperature problems at the same altitudes=20= (14=20 to 15,000=E2=80=99). =20 It turned out that I needed to have my fuel pump recalibrated by TCM in=20 Mobile. During this period I found I could increase the fuel flow about 5 G= PH by=20 turning on the high boost pump. You might want to turn on the high boost pu= mp=20 around 12,000=E2=80=99 and see if this doesn=E2=80=99t allow you to climb a= bove 14,000=E2=80=99=20 without the CHTs going up. =20 Lynn Farnsworth Super Legacy #235 TSIO-550 Powered Race #44 =3D **************A Good Credit Score is 700 or Above. See yours in just 2 easy=20 steps!=20 (http://pr.atwola.com/promoclk/100126575x1220439616x1201372437/aol?redir=3Dh= ttp:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgI= D %3D62%26bcd%3DfebemailfooterNO62) -------------------------------1237041211 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en

or for those of you who like to keep things simple -- turn it on after=20 start and turn it off before shut down.

Jeff

1200+ hours on a boost pump

In a message dated 3/14/2009 6:33:09 A.M. Central Daylight Time,=20 walter@advancedpilot.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Vapor=20 lock in a fast climb to altitude is a common problem in TC'd aircraft and=20= can=20 even be a problem in high performance NA aircraft. That's why we=20 recommend turning on the boost pump in most of these applications as one=20 passes through 10,000 feet in a climb. We also recommend leaving the= =20 boost pump on for at least 30 min. after reaching cruise altitude so the f= uel=20 in the tanks can cool off and will no longer be subject to vapor lock.=20 Vapor lock essentially leans the mixture and will be noted by a risi= ng=20 EGT/TIT in the climb--even wit the mixture remaining full rich.=20

Walter

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

Dr=20 Katz,

About a year ag= o I=20 had a similar problem with fuel flow reduction during climb. It would caus= e=20 increased temperature problems at the same altitudes (14 to=20 15,000=E2=80=99).

It turned out t= hat I=20 needed to have my fuel pump recalibrated by TCM in Mobile. During this period I found I co= uld=20 increase the fuel flow about 5 GPH by turning on the high boost pump. You=20 might want to turn on the high boost pump around 12,000=E2=80=99 and see i= f this=20 doesn=E2=80=99t allow you to climb above 14,000=E2=80=99 without the CHTs=20= going=20 up. Lynn=20 Farnsworth Super Legacy=20 #235 TSIO-550=20 Powered Race=20 #44=
=3D

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