Return-Path: Received: from relay03.roc.ny.frontiernet.net ([66.133.131.36] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 536566 for flyrotary@lancaironline.net; Wed, 17 Nov 2004 16:49:48 -0500 Received-SPF: pass receiver=logan.com; client-ip=66.133.131.36; envelope-from=canarder@frontiernet.net Received: from filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.131.176]) by relay03.roc.ny.frontiernet.net (Postfix) with ESMTP id E5A58191DF0 for ; Wed, 17 Nov 2004 21:49:18 +0000 (UTC) Received: from relay03.roc.ny.frontiernet.net ([66.133.131.36]) by filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.131.176]) (amavisd-new, port 10024) with LMTP id 06610-20-82 for ; Wed, 17 Nov 2004 21:49:18 +0000 (UTC) Received: from JIM2004 (67-137-89-83.dsl2.cok.tn.frontiernet.net [67.137.89.83]) by relay03.roc.ny.frontiernet.net (Postfix) with ESMTP id 7958B191CC5 for ; Wed, 17 Nov 2004 21:49:17 +0000 (UTC) Message-ID: <419BC752.1090106@frontiernet.net> Date: Wed, 17 Nov 2004 15:49:06 -0600 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: External Fuel Pump ... References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 0445-2, 11/04/2004), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter01.roc.ny.frontiernet.net I'm basically sold. How do I regulate the pressure from 40 psi pump(s) at 26 psi? Can I do this halfway at a time (retain the engine driven pump and plumb the boost pump in series)? I'm still short a pressure regulator and a design criterion ... Jim S. Charlie England wrote: > Various RV-x drivers that use the O-320-H-series engine have deleted > the front mounted mech. pump & gone to 2 elec. pumps (low pressure > carburated systems). > > Charlie > > Tracy Crook wrote: > >> The engine driven fuel pump (bolted to a hot air cooled engine) with >> a gascolator mounted down where the hottest air exits and near red >> hot exhaust pipes (standard aircraft practice) is the dumbest fuel >> system layout I can think of. And they wonder why they are so prone >> to vapor lock........ >> >> Two electrics sound like a fine idea to me. >> >> Tracy >> >> ----- Original Message ----- >> From: Jim Sower >> To: Rotary motors in aircraft >> Sent: Wednesday, November 17, 2004 12:13 PM >> Subject: [FlyRotary] External Fuel Pump ... >