X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 07 Jun 2007 16:00:59 -0400 Message-ID: X-Original-Return-Path: Received: from [68.98.211.24] (HELO systems3.net) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2089480 for lml@lancaironline.net; Thu, 07 Jun 2007 12:18:59 -0400 Received-SPF: none receiver=logan.com; client-ip=68.98.211.24; envelope-from=cberland@systems3.net Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C7A91F.75C4F066" X-MimeOLE: Produced By Microsoft Exchange V6.5 Subject: RE: [LML] Re: Hickman's Accident: NTSB Probable Cause Report X-Original-Date: Thu, 7 Jun 2007 09:18:14 -0700 X-Original-Message-ID: <87C33F695961494D886EB3B6C8A476512F38B8@s3server.Systems3.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: Hickman's Accident: NTSB Probable Cause Report Thread-Index: AcepHGEDxDOGLKMnQMqaPIbojAyFdQAAYaAA From: "Craig Berland" X-Original-To: "Lancair Mail List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C7A91F.75C4F066 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The check valve I referred to is in the engine fuel pump. The same check valve comes into play so boost fuel pressure to the system can by-pass the engine driven fuel pump during engine starting. While I do not have any first hand experience with and engine pump failure, I would expect you would want to plan on using the red knob. However, a poorly running engine needing mixture control is more desirable to me than a glider. Craig Berland Colyn wrote: where is the check valve? this is to prevent backflow through the mechanical pump...or through the boost when it's not running? or what? =09 =09 The fuel system on the TSIO550 is designed to allow high boost from an auxiliary pump to be used as a back up for engine pump failure. There is a check valve in the system for this purpose. Craig Berland ------_=_NextPart_001_01C7A91F.75C4F066 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
The check valve I referred to is in the engine = fuel=20 pump.  The same check valve comes into play so boost fuel pressure = to the=20 system can by-pass the engine driven fuel pump during engine = starting. =20 While I do not have any first hand experience with and engine pump = failure, I=20 would expect you would want to plan on using the red knob.  = However, a=20 poorly running engine needing mixture control is more desirable to me = than a=20 glider.
Craig Berland

 Colyn wrote:  where is the = check=20 valve?  this is to prevent backflow through the mechanical = pump...or=20 through the boost when it's not running?   or=20 what?
The fuel system on = the TSIO550 is=20 designed to allow high boost from an auxiliary pump to be used as = a back=20 up for engine pump failure.  There is a check valve in the system = for=20 this purpose.
Craig=20 Berland
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