X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 922007 for flyrotary@lancaironline.net; Mon, 02 May 2005 08:13:43 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [63.13.186.38]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 4.1.361.0) with SMTP id for ; Mon, 2 May 2005 05:12:53 -0700 Message-ID: <00a701c54f10$404630a0$6401a8c0@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: fuel pumps/forced landing Date: Mon, 2 May 2005 07:12:45 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A4_01C54EE6.5709C5B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_00A4_01C54EE6.5709C5B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessagePaul, If your ignition system shuts off the pump with no spark, isn't the = following going to happen? Pump 1 on -- engine running, pump 1 fuse blows, engine shuts down very quickly, Pump 2 turned on, but no spark since engine has stopped, therefore it = shuts off right away. Sounds like if engine stops, you have to crank it to get it started = again Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: sqpilot@bellsouth.net=20 To: Rotary motors in aircraft=20 Sent: Monday, May 02, 2005 1:42 PM Subject: [FlyRotary] Re: fuel pumps/forced landing Turned on the other pump, but the engine had already quit. (yes, it = happens very fast) =20 I now recall reading in the MicroTech manual that the fuel pumps = shut off if it detects no spark from the coils, so that it would not = continue pumping fuel into an engine that has no spark. This is = obviously why the pump only runs for a few seconds when I first turn on = the ignition switch, then quickly stops pumping. We put a voltmeter to = the inline fuse, and found that it had 12.9 volts as soon as the = ignition was turned on, but after a few seconds, the pump stopped and = there was no longer any voltage at the fuse.=20 I'm hoping we can find what caused the slight fuel obstruction in = front of the gascolator....if we can't find the cause, it would be = difficult to regain confidence in the fuel system. Too bad, because the = engine was running strong and smooth, and the temps were great!!! Paul = aka deadstick Conner ------=_NextPart_000_00A4_01C54EE6.5709C5B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Paul,
If your ignition system shuts off the = pump with no=20 spark, isn't the following going to happen?
 
Pump 1 on -- engine = running,
pump 1 fuse blows, engine shuts down = very=20 quickly,
Pump 2 turned on, but no spark since = engine has=20 stopped, therefore it shuts off right away.
 
Sounds like if engine stops, you have = to crank it=20 to get it started again
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 sqpilot@bellsouth.net
Sent: Monday, May 02, 2005 1:42 = PM
Subject: [FlyRotary] Re: fuel=20 pumps/forced landing
 Turned on the other pump, but=20 the engine had already quit. (yes, it happens very=20 fast)  
 
      I now = recall=20 reading in the MicroTech manual that the fuel pumps shut off if it = detects no=20 spark from the coils, so that it would not continue pumping fuel into = an=20 engine that has no spark. This is obviously why the pump only runs for = a few=20 seconds when I first turn on the ignition switch, then quickly stops = pumping.=20 We put a voltmeter to the inline fuse, and found that it had 12.9 = volts as=20 soon as the ignition was turned on, but after a few seconds, the pump = stopped=20 and there was no longer any voltage at the fuse.
    I'm hoping we can = find what=20 caused the slight fuel obstruction in front of the gascolator....if we = can't=20 find the cause, it would be difficult to regain confidence in the fuel = system.=20 Too bad, because the engine was running strong and smooth, and the = temps were=20 great!!!  Paul aka deadstick = Conner
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