Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Mon, 14 Oct 2002 00:06:30 -0400 Message-ID: X-Original-Return-Path: Received: from [209.228.32.218] (HELO c003.snv.cp.net) by logan.com (CommuniGate Pro SMTP 4.0b9) with SMTP id 1804881 for flyrotary@lancaironline.net; Mon, 14 Oct 2002 00:02:46 -0400 Received: (cpmta 11395 invoked from network); 13 Oct 2002 21:02:11 -0700 Received: from 216.227.84.137 (HELO telocity.com) by smtp.telocity.com (209.228.32.218) with SMTP; 13 Oct 2002 21:02:11 -0700 X-Sent: 14 Oct 2002 04:02:11 GMT X-Original-Message-ID: <3DAA41B0.5040402@telocity.com> X-Original-Date: Mon, 14 Oct 2002 00:01:52 -0400 From: Michael Robert User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.0) Gecko/20020530 X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: EWP water pump References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Marvin Kaye wrote: > Posted for Jim Sower : > > I thought that in a closed system there was no head pressure. If the > system is > pressurized, there is system pressure, but still no head pressure. > The closed loop > cancels everything out. > Just wonderin' .... Jim S. > > >> Yes, I do think it would account for errors in the test. Head >> pressures on >> pumps are a big factor in sizing pumps & motors in industry. > > >>> Homepage: http://members.rogers.com/flyrotary/ >> > > There would be no "head pressure" - there will be friction loss - different animal, same effect, except that friction loss will scale with flow. -Mike -- "The surest sign that intelligent life exists elsewhere in the universe is that they have never tried to contact us' - Calvin and Hobbes