Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 26 Aug 2003 16:19:46 -0400 Message-ID: X-Original-Return-Path: Received: from [207.254.33.66] (HELO dewey.Cadwell.cadwell.com) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2547726 for lml@lancaironline.net; Tue, 26 Aug 2003 15:27:58 -0400 Subject: boost pump IVP X-Original-Date: Tue, 26 Aug 2003 12:27:42 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C36C08.1E6759F6" X-Original-Message-ID: Content-Class: urn:content-classes:message X-MimeOLE: Produced By Microsoft Exchange V6.0.4712.0 X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: boost pump IVP Thread-Index: AcNsCB5cT9+VZLGxR9yTiNps8AoSGA== From: "Carl Cadwell" X-Original-To: This is a multi-part message in MIME format. ------_=_NextPart_001_01C36C08.1E6759F6 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I will share again my experience with numerous burps (vaporization) in the fuel when switching tanks the first time at flight levels FL200-250). It was worse on hot days. =20 Cure: I moved the fuel pump off the side wall to the floor on the copilot side between the wheel well and the exhaust tunnel. I have had only one hesitation of the engine since moving the pump. =20 =20 Conclusion: Mount the fuel pump where it always pumps-on the floor somewhere. =20 We operate very close the vapor point of the fuel at high altitudes. If we don't suck on the fuel we don't lower the partial pressure any further. Now the pump operates as a pump as the level is below the fuel level in a full wing. =20 Carl Cadwell N25CL, IVP 425 hrs. ------_=_NextPart_001_01C36C08.1E6759F6 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I will share again my experience with numerous burps = (vaporization) in the fuel when switching tanks the first time at flight levels = FL200-250).  It was worse on hot days.

 

Cure:  I moved the fuel pump off the side wall to the floor = on the copilot side between the wheel well and the exhaust tunnel.  I have = had only one hesitation of the engine since moving the pump.  =

 

Conclusion:   Mount the fuel pump where it always = pumps—on the floor somewhere.

 

 We operate very close the vapor point of the fuel at high altitudes.  If we don’t suck on the fuel we don’t lower = the partial pressure any further.  Now the pump operates as a pump as the level = is below the fuel level in a full wing.

 

Carl Cadwell

N25CL, IVP 425 hrs.

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