X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 15 Jul 2007 20:29:21 -0400 Message-ID: X-Original-Return-Path: Received: from smtpauth13.prod.mesa1.secureserver.net ([64.202.165.37] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with SMTP id 2179279 for lml@lancaironline.net; Sun, 15 Jul 2007 17:28:20 -0400 Received-SPF: none receiver=logan.com; client-ip=64.202.165.37; envelope-from=randy@aoaircrafters.com Received: (qmail 22215 invoked from network); 15 Jul 2007 21:27:43 -0000 Received: from unknown (12.226.126.28) by smtpauth13.prod.mesa1.secureserver.net (64.202.165.37) with ESMTP; 15 Jul 2007 21:27:42 -0000 From: "Randy L. Hartman, Jr." X-Original-To: Subject: L360 Fuel pressure X-Original-Date: Sun, 15 Jul 2007 16:27:15 -0500 Organization: Alpha Omega Aircrafters MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C7C6FD.02321290" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcfHJuoJQPL0k7OhRT6ieT4AsmnD+A== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Original-Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C7C6FD.02321290 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit What fuel pressure range should I be seeing for a Lycoming IO-360 in a Lancair 360 (N360DE)? The fuel pressure is indicating between 16 and 18 without the boost pump on. When I go to altitudes above 6,000 feet, the fuel pressure drops a pound or two so I turn on the boost pump. With the boost pump on fuel pressure in indicated between 18 and 20 PSI. What is interesting is that the VM 1000 (where Fuel Pressure is indicated) has a red arc section, a yellow arc section, and a green arc section. At the fuel pressures I am seeing; 16 PSI is in the top end of the yellow arc, so 17 to 20 PSI appears in the lower range of the green arc - giving us the feeling that we are on the ragged edge of not having proper fuel pressure for normal operation. The VM-1000 can be calibrated so that the proper fuel pressure indicates more properly in the green arc - if this is proper. Information that may be important to know: IO-360 Model = Started life as O-360-C2A and converted to an IO-360 - S/N L-21393-36A Fuel pressure is taken after the mechanical pump, 1 foot before the fuel servo on a tee fitting. Fuel system/model/etc. = Bendix, model RSA 5AD1, parts list 2524213-10 less issues -11, S/N 9354/10 Have any components (fuel pump, servo, flow-divider, nozzles, etc.) been modified? = Fuel servo mod: there was a mod made to the servo fuel injector to reverse the actuation of the butterfly valve and the fuel-metering valve. When the throttle arm was rotated full forward; this was the idle position of the butterfly valve and the fuel-metering valve. We had this reversed so that full forward position resulted in full throttle. No other mods. What type mechanical (engine-driven) fuel pump (diaphragm or rotary)? = Diaphragm Thanks in advance. Randy Hartman ------=_NextPart_000_000D_01C7C6FD.02321290 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

What fuel pressure range should I be seeing for a Lycoming IO-360 in a = Lancair 360 (N360DE)?

The fuel pressure is indicating between 16 and 18 without the boost pump on. When I go to altitudes above 6,000 feet, the fuel pressure drops a = pound or two so I turn on the boost pump. With the boost pump on fuel = pressure in indicated between 18 and 20 PSI.

What is interesting is that the VM 1000 (where Fuel Pressure is indicated) has a = red arc section, a yellow arc section, and a green arc section. At the = fuel pressures I am seeing; 16 PSI is in the top end of the yellow arc, so 17 = to 20 PSI appears in the lower range of the green arc – giving us the = feeling that we are on the ragged edge of not having proper fuel pressure for = normal operation.

The VM-1000 can be calibrated so that the proper fuel pressure indicates = more properly in the green arc – if this is = proper.

= Information that may be important to know:

=

= IO-360 Model =3D Started = life as O-360-C2A and converted to an IO-360 – S/N = L-21393-36A

= Fuel pressure is taken after the = mechanical pump, 1 foot before the fuel servo on a tee = fitting.

= Fuel system/model/etc. =3D Bendix, = model RSA 5AD1, parts list 2524213-10 less issues -11, S/N = 9354/10

= Have any components (fuel pump, servo, flow-divider, nozzles, etc.) been = modified? =3D Fuel servo mod: there was a mod made to the servo = fuel injector to reverse the actuation of the butterfly valve and the = fuel-metering valve. When the throttle arm was rotated full forward; this was = the idle position of the butterfly valve and the fuel-metering valve. We = had this reversed so that full forward position resulted in full = throttle.

No other = mods.

What type mechanical (engine-driven) fuel pump (diaphragm or = rotary)? =3D Diaphragm

Thanks in = advance.

Randy = Hartman

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