X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 18 Jun 2009 13:01:28 -0400 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3686801 for lml@lancaironline.net; Thu, 18 Jun 2009 09:30:15 -0400 Received-SPF: none receiver=logan.com; client-ip=71.74.56.123; envelope-from=schaefer@rts-services.com Received: from Master.RTS-Services.com ([24.174.112.232]) by hrndva-omta01.mail.rr.com with ESMTP id <20090618132922931.BJGW8089@hrndva-omta01.mail.rr.com> for ; Thu, 18 Jun 2009 13:29:22 +0000 Received: from RTSLaptop (cpe-24-174-112-232.austin.res.rr.com [24.174.112.232] (may be forged)) (authenticated bits=0) by Master.RTS-Services.com (8.13.1/8.13.1) with ESMTP id n5IDTAbo008197 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO) for ; Thu, 18 Jun 2009 08:29:16 -0500 From: "Richard T. Schaefer" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Boost pump question X-Original-Date: Thu, 18 Jun 2009 08:29:06 -0500 X-Original-Message-ID: <01E21121AA18434CAE31DDE04A76B1F0@RTSLaptop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A7_01C9EFEE.DBEB36D0" X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: AcnwFgT2Mt+PW7ZqS/6J9hWeEYY0YwAADA3A X-Spam-Score: -0.217 () BAYES_00,DYN_RDNS_SHORT_HELO_HTML,HTML_MESSAGE,RCVD_IN_PBL,RCVD_IN_SORBS_DUL,RDNS_DYNAMIC X-Scanned-By: MIMEDefang 2.67 on 192.168.10.101 This is a multi-part message in MIME format. ------=_NextPart_000_00A7_01C9EFEE.DBEB36D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Dan, My understanding (from reading the Columbia 400 manual) is that the Low mode is used for vapor suppression above 10,000 ft. The High is used when the mechanical pump fails, during prime, and prior to a hot start to cool any heat soaked components in the fuel system (as the hot excess fuel is returned to your fuel tank). When you setup your fuel system for your engine you should verify that high fuel pump mode will not flood your engine. In the Columbia (as I understand) the prime button engages the high fuel mode. They have a three way switch, LOW, OFF, and HIGH arm. The HIGH arm uses a fuel pressure switch and locking relay. The intent is if the fuel pressure drops while on HIGH arm, the HIGH mode of the fuel pump is engaged and is locked in, even as the fuel pressure rises as a result of the pump coming on. The HIGH arm is used during climb and cruise below 10,000 ft and set to OFF during descent. (And of course the LOW is used always above 10,000 ft). I assume you would go to HIGH arm on a go-around . one more thing to the checklist during a busy time. It's important to make sure that HIGH and LOW are not engaged at the same time. So there is some care to how the primer button interacts with the three way switch. This is how I am setting up my IV-P. r.t.s. _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dan Reagan Sent: Thursday, June 18, 2009 8:09 AM To: lml@lancaironline.net Subject: [LML] Boost pump question Since my crankshaft bolt problem is causing me to change out my engine, I have decided to change from my current FADEC engine to a conventional mixture control engine. The boost pump I currently have is a 2 speed Dukes and in the past was turned on and off by FADEC. (It could be manually turned on as when above 10,000 feet) My question is, when I am rewiring the fuel pump, do I need both the high and the low speeds? My dumb question of the day is, when is the fuel pump supposed to be used on the TSIO550 in the Lancair IVP? Dan Reagan IVP 650 hours ------=_NextPart_000_00A7_01C9EFEE.DBEB36D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dan,

  My understanding (from = reading the Columbia 400 = manual) is that the Low mode is used for vapor suppression above 10,000 = ft.

  The High is used when the mechanical pump fails, during prime, and prior to a hot start to cool = any heat soaked components in the fuel system (as the hot excess fuel is returned = to your fuel tank).

 

  When you setup your fuel = system for your engine you should verify that high fuel pump mode will not flood = your engine.

 

  In the Columbia (as I understand) the prime = button engages the high fuel mode.

  They have a three way = switch, LOW, OFF, and HIGH arm.

  The HIGH arm uses a fuel = pressure switch and locking relay. The intent is if the fuel pressure drops while = on HIGH arm, the HIGH mode of the fuel pump is engaged and is locked in, = even as the fuel pressure rises as a result of the pump coming = on.

   The HIGH arm is used = during climb and cruise below 10,000 ft and set to OFF during descent. (And of = course the LOW is used always above 10,000 ft).

   I assume you would go = to HIGH arm on a go-around … one more thing to the checklist during a busy = time.

 

   It’s important = to make sure that HIGH and LOW are not engaged at the same time. So there is = some care to how the primer button interacts with the three way switch. =

 

  This is how I am setting up = my IV-P.

  =

r.t.s. =

 

From: = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dan Reagan
Sent: Thursday, June 18, = 2009 8:09 AM
To: = lml@lancaironline.net
Subject: [LML] Boost pump = question

 

Since my crankshaft bolt problem is causing me to = change out my engine, I have decided to change from my current FADEC engine to a conventional mixture control engine.  The boost pump I currently = have is a 2 speed Dukes and in the past was turned on and off by FADEC. (It could = be manually turned on as when above 10,000 feet)  =

 

My question is, when I am rewiring the fuel pump, do = I need both the high and the low speeds?  My dumb question of the day is, when is the fuel pump supposed to be used on the TSIO550 in the Lancair IVP?

 

Dan Reagan

IVP 650 hours

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