X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from relay02.roc.ny.frontiernet.net ([66.133.182.165] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1002887 for flyrotary@lancaironline.net; Wed, 15 Jun 2005 11:08:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.133.182.165; envelope-from=canarder@frontiernet.net Received: from filter06.roc.ny.frontiernet.net (filter06.roc.ny.frontiernet.net [66.133.183.73]) by relay02.roc.ny.frontiernet.net (Postfix) with ESMTP id 5AD11370682 for ; Wed, 15 Jun 2005 15:08:12 +0000 (UTC) Received: from relay02.roc.ny.frontiernet.net ([66.133.182.165]) by filter06.roc.ny.frontiernet.net (filter06.roc.ny.frontiernet.net [66.133.183.73]) (amavisd-new, port 10024) with LMTP id 14109-03-58 for ; Wed, 15 Jun 2005 15:08:12 +0000 (UTC) Received: from [127.0.0.1] (67-137-78-176.dsl2.cok.tn.frontiernet.net [67.137.78.176]) by relay02.roc.ny.frontiernet.net (Postfix) with ESMTP id BA92F3707DE for ; Wed, 15 Jun 2005 15:08:11 +0000 (UTC) Message-ID: <42B0445E.7070905@frontiernet.net> Date: Wed, 15 Jun 2005 10:08:14 -0500 From: Jim Sower User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Engine Not Starting References: In-Reply-To: Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 0524-2, 06/15/2005), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter06.roc.ny.frontiernet.net <... 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 ...>

That'd be my guess ... Jim S.

Al Gietzen wrote:

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.

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