X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.85] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1002911 for flyrotary@lancaironline.net; Wed, 15 Jun 2005 11:23:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.85; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 15 Jun 2005 08:22:32 -0700 Message-ID: Received: from 64.4.51.220 by BAY107-DAV13.phx.gbl with DAV; Wed, 15 Jun 2005 15:22:32 +0000 X-Originating-IP: [64.4.51.220] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Engine Not Starting Date: Wed, 15 Jun 2005 11:22:24 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00E6_01C5719C.80DB4DE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Wed, 15 Jun 2005 11:22:24 -0400 X-OriginalArrivalTime: 15 Jun 2005 15:22:32.0434 (UTC) FILETIME=[0CEA6520:01C571BE] This is a multi-part message in MIME format. ------=_NextPart_000_00E6_01C5719C.80DB4DE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 I picked up the idea from the Eggenfellner Subaru group. They had had = a couple of instances where pilots ran one tank dry and then couldn't = get the EFI pump to re-prime, and ended up in off-field landings. It is = now a mandatory change for anyone running the Eggenfellner package Before installing the bypass bleeder circuit, it would not re-prime = unless I cracked open a line downstream of the pump. =20 Mark S. I'm not sure I get this. It must be system design dependant. I have = filled my tanks from dead empty; turned on the pump and immediately had = fuel pressure. Ran the tanks dry; then added some fuel; turned on the = pump - immediately had pressure. True; I have done this on the ground, = but should it be any different in the air. The key may be that the line = from my sump tank to the pump has a slight downward slope so the fuel = will fill the line and the air goes back to the sump. What does the .025 bypass orifice do that open injectors while engine = cranking won't do? Al That's the problem with this kind of data. I'm sure the Eggenfellner = people were telling the truth about what they saw but you can't then = generalize and make their solution a 'carved-in-stone' rule. I have no = details on their system but I suspect there was a deficiency in their = fuel system which their bleeder fix covered up or compensated for. = Like Al, I've never seen this problem on my plane or engine test stand. Tracy (trying to figure out why I can't change the text color when I = reply to Al's posts) ------=_NextPart_000_00E6_01C5719C.80DB4DE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I picked=20 up the idea from the Eggenfellner Subaru group. They had had a = couple of=20 instances where pilots ran one tank dry and then couldn=92t get the = EFI pump to=20 re-prime, and ended up in off-field landings. It is now a = mandatory=20 change for anyone running the Eggenfellner package

Before=20 installing the bypass bleeder circuit, it would not re-prime unless I = cracked=20 open a line downstream of the pump.

Mark=20 S.

I=92m not = sure I get=20 this. It must be system design dependant. I have filled my = tanks=20 from dead empty; turned on the pump and immediately had fuel = pressure. =20 Ran the tanks dry; then added some fuel; turned on the pump =96 = immediately had=20 pressure. True; I have done this on the ground, but should it be = any=20 different in the air. The key may be that the line from my sump = tank to=20 the pump has a slight downward slope so the fuel will fill the line = and the=20 air goes back to the sump.

What does = the .025=20 bypass orifice do that open injectors while engine cranking won=92t=20 do?

Al

That's = the problem=20 with this kind of data. I'm sure the Eggenfellner people were = telling=20 the truth about what they saw but you can't then generalize and make = their=20 solution a 'carved-in-stone' rule. I have no details on their = system but=20 I suspect there was a deficiency in their fuel system which their = bleeder fix=20 covered up or compensated for. Like Al, I've never = seen this=20 problem on my plane or engine test stand.

Tracy (trying=20 to figure out why I can't change the text color when I reply to Al's=20 posts)

------=_NextPart_000_00E6_01C5719C.80DB4DE0--