X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 24 Sep 2006 23:07:32 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m18.mx.aol.com ([64.12.138.208] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1417916 for lml@lancaironline.net; Sun, 24 Sep 2006 10:14:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.208; envelope-from=VTAILJEFF@aol.com Received: from VTAILJEFF@aol.com by imo-m18.mx.aol.com (mail_out_v38_r7.6.) id q.553.a1a9700 (30737) for ; Sun, 24 Sep 2006 10:14:04 -0400 (EDT) From: VTAILJEFF@aol.com X-Original-Message-ID: <553.a1a9700.3247ecab@aol.com> X-Original-Date: Sun, 24 Sep 2006 10:14:03 EDT Subject: Re: [LML] Re: Boost pump switching X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1159107243" X-Mailer: 9.0 SE for Windows sub 5031 X-Spam-Flag: NO -------------------------------1159107243 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/23/2006 9:01:38 PM Central Standard Time, charliekohler@yahoo.com writes: Perhaps I can shed a light on this subject. The fuel system is principally a balance between orifice size and pressure. The engine-driven fuel pump has aneroid which puts upper deck air pressure to regulate a needle valve. If pressure / flow adjustments on this needle valve are made without a fuel pump on, to add engine-driven fuel pump pressure will increase flow. (Hi Side) Charlie, Thank you for the great information about the TCM fuel system and dispelling some of the OWT on the LML. Adding 3-5 gph in cruise flight will not cause the engine to quit. If it does then the engine fuel system was probably not set up correctly in the first place. Regards, Jeff Edwards LIVP -------------------------------1159107243 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 9/23/2006 9:01:38 PM Central Standard Time,=20 charliekohler@yahoo.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3D"Times New Roman" color=3D#= 000000=20 size=3D2>

Perhaps I can shed a light on this subject. The fuel sys= tem is=20 principally a balance between orifice size and pressure.

The engine-driven fuel pump has aneroid which puts upper= deck=20 air pressure to regulate a needle valve. If pressure / flow adjustmen= ts=20 on this needle valve are made without a fuel pump on, to add engine-driven= =20 fuel pump pressure will increase flow. (Hi Side)

Charlie,

Thank you for the great information about the TCM fuel system and=20 dispelling some of the OWT on the LML. Adding 3-5 gph in cruise flight will=20= not=20 cause the engine to quit. If it does then the engine fuel system was probabl= y=20 not set up correctly in the first place.

Regards,

Jeff Edwards

LIVP

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