Return-Path: Received: from [65.33.167.37] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 4.1.5) with HTTP id 2630711 for flyrotary@lancaironline.net; Thu, 09 Oct 2003 18:35:32 -0400 From: "Marvin Kaye" Subject: Re: [FlyRotary] pump power To: flyrotary X-Mailer: CommuniGate Pro WebUser Interface v.4.1.5 Date: Thu, 09 Oct 2003 18:35:32 -0400 Message-ID: In-Reply-To: <003001c38ea3$313e8460$1702a8c0@WorkGroup> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Ed Anderson" : Bill, is the second chart showing approx 0.175 HP required for 20 gph flow? and given a 50% efficiency for an electric motor the actually HP required by an electric motor around 0.35 HP? If so that is still within the ball park of the EWP. Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com >>>The second page is the energy required to pump water according to the pump curve for 5594 rpm. As you can see, at zero flow, the required *pumping* energy is very low, rises as flow rises, and drops at high flows since there is less head developed. All this assumes my equations for HP are correct.<<<