Return-Path: Received: from [206.47.199.165] (HELO simmts7-srv.bellnexxia.net) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2635806 for flyrotary@lancaironline.net; Mon, 13 Oct 2003 21:11:07 -0400 Received: from nbnet.nb.ca ([142.166.138.50]) by simmts7-srv.bellnexxia.net (InterMail vM.5.01.06.04 201-253-122-130-104-20030726) with ESMTP id <20031014011103.DZPF13910.simmts7-srv.bellnexxia.net@nbnet.nb.ca> for ; Mon, 13 Oct 2003 21:11:03 -0400 Message-ID: <3F8B4D96.3F702EE7@nbnet.nb.ca> Date: Mon, 13 Oct 2003 22:12:54 -0300 From: Rino X-Mailer: Mozilla 4.77 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: EWP - series pumps and wacky ideas References: Content-Type: text/plain; charset=iso-8859-2 Content-Transfer-Encoding: 7bit Mark Steitle wrote: > > At 01:39 PM 10/13/2003 -0400, you wrote: > ><... fuel pressure would begin dropping, along with power, and exhaust temps > >would rise ...> > >That'd be my guess too. So an engine monitor showing both pump pressures (if > >parallel) would show a decay in pressure. I'd be comfortable using both pumps > >for TO and landing, switching them enroute one to the other. > > That's my plan... > > Mark S. My installation has the two pumps in parallel. Either pump gives me a pressure of 40 psi. When I switch both pumps I get a pressure of 55 psi. That pressure difference would affect fuel flow at the injectors. I do not know if it is a good thing of not. because of the pressure difference I plan on using one pump only at a time. Rino