Return-Path: Received: from pd5mo1so.prod.shaw.ca ([24.71.223.10] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2644714 for flyrotary@lancaironline.net; Tue, 21 Oct 2003 00:53:00 -0400 Received: from pd4mr4so.prod.shaw.ca (pd4mr4so-qfe3.prod.shaw.ca [10.0.141.215]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.16 (built May 14 2003)) with ESMTP id <0HN3000JAC8B22@l-daemon> for flyrotary@lancaironline.net; Mon, 20 Oct 2003 22:52:59 -0600 (MDT) Received: from pn2ml2so.prod.shaw.ca (pn2ml2so-qfe0.prod.shaw.ca [10.0.121.146]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.16 (built May 14 2003)) with ESMTP id <0HN300B3KC8BIN@l-daemon> for flyrotary@lancaironline.net; Mon, 20 Oct 2003 22:52:59 -0600 (MDT) Received: from u99487 (h24-67-187-90.ed.shawcable.net [24.67.187.90]) by l-daemon (iPlanet Messaging Server 5.2 HotFix 1.16 (built May 14 2003)) with SMTP id <0HN300635C8BMD@l-daemon> for flyrotary@lancaironline.net; Mon, 20 Oct 2003 22:52:59 -0600 (MDT) Date: Mon, 20 Oct 2003 22:53:00 -0600 From: Alfred Jungkind Subject: Re: [FlyRotary] Re: Water pumps Somebody STOP me! To: Rotary motors in aircraft Message-id: <004701c3978f$340bc550$5abb4318@u99487> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 X-Mailer: Microsoft Outlook Express 6.00.2720.3000 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT X-Priority: 3 X-MSMail-priority: Normal References: Hi Bill ScherTz : You wouldn't be trying to be funny now , would you ? Are you sure you spelled your name correctly ? ( Scherz means " pulling a fast one OR BEING FUNNY "in German ; could not help it , guys ! ) Just ignore it ! Alfred ----- Original Message ----- From: "William" To: "Rotary motors in aircraft" Sent: Monday, October 20, 2003 8:00 PM Subject: [FlyRotary] Re: Water pumps Somebody STOP me! > Yes, as you throttle down a pump, you have less water going through it, but > the motor is still pumping in power -- not as much as when you are letting > water flow and doing work on it, but still significant. The difference > between the power in, and the power put into the water by pumping it is > transformed to heat, raising the temperature of the water. This can cause > cavitation under some conditions, when you get to a suction pressure less > thant the vapor pressure of the fluid. > Bill Schertz > ----- Original Message ----- > From: > > > > Forgive me for being slow here, but there are quite a few more lines on > this graph than I'm used to. Does this graph say that as the head pressure > rises to 100ft, it raises the water temp by about 40 degree,and yet uses > nearly 10HP to do it? > > Content-Type: multipart/alternative; > > boundary="----=_NextPart_001_0A85_01C39682.B1BBDDE0" > > > > > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html