X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx1.grc.nasa.gov ([128.156.11.68] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 963864 for flyrotary@lancaironline.net; Thu, 26 May 2005 06:26:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=128.156.11.68; envelope-from=Joseph.M.Berki@grc.nasa.gov Received: from lombok-fi.grc.nasa.gov (seraph4.grc.nasa.gov [128.156.10.13]) by mx1.grc.nasa.gov (Postfix) with ESMTP id 4975FC21A for ; Thu, 26 May 2005 06:25:22 -0400 (EDT) Received: from apataki.grc.nasa.gov (apataki.grc.nasa.gov [139.88.112.35]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id j4QAPLK9008008 for ; Thu, 26 May 2005 06:25:21 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by apataki.grc.nasa.gov (NASA GRC TCPD 8.13.1/8.13.1) with ESMTP id j4QAPLw7026871 for ; Thu, 26 May 2005 06:25:21 -0400 (EDT) Received: from apataki.grc.nasa.gov ([127.0.0.1])by localhost (apataki.grc.nasa.gov [127.0.0.1]) (amavisd-new, port 10024)with ESMTP id 22336-09 for ;Thu, 26 May 2005 06:25:21 -0400 (EDT) Received: from GR7700013583.lerc.nasa.gov (gr7700013583.grc.nasa.gov [139.88.139.62])by apataki.grc.nasa.gov (NASA GRC TCPD 8.13.1/8.13.1) with ESMTP id j4QAPIMt026865for ; Thu, 26 May 2005 06:25:18 -0400 (EDT) X-Info: ODIN / NASA Glenn Research Center Message-Id: <5.1.1.5.2.20050526061932.010c6ce8@popserve.lerc.nasa.gov> X-Sender: scberki@popserve.lerc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Thu, 26 May 2005 06:25:15 -0400 To: "Rotary motors in aircraft" From: Joseph M Berki Subject: Returnless Injection Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed X-imss-version: 2.025 X-imss-result: Passed X-imss-approveListMatch: *@*.NASA.GOV I did some searching on the web for returnless systems. It seems that several manufacturers use them. The aftermarket has adapted an additional pump electronically controlled to provide additional fuel for turbo/ supercharging applications. I was interested in returnless fuel injection for when you have low fuel level and the AC is in a nose down attitude and the sump is being drained via the return line. Has anyone looked into this? Thanks for any help Joe Berki Limo EZ