Return-Path: Received: from ns5.rokland.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP-TLS id 539077 for flyrotary@lancaironline.net; Fri, 19 Nov 2004 15:18:37 -0500 Received-SPF: none receiver=logan.com; client-ip=67.15.10.31; envelope-from=bob@bob-white.com Received: from bgp01386375bgs.brodwy01.nm.comcast.net ([68.35.160.229] helo=localhost) by ns5.rokland.us with smtp (Exim 4.43) id 1CVFCn-0003c4-F0 for flyrotary@lancaironline.net; Fri, 19 Nov 2004 14:18:05 -0600 Date: Fri, 19 Nov 2004 13:18:04 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: FW: Mezier electric water pump. Message-Id: <20041119131804.405337bf.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed version 1.0.0beta2 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Antivirus-Scanner: Clean mail though you should still use an Antivirus X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - ns5.rokland.us X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com X-Source: X-Source-Args: X-Source-Dir: Hi Dale, according to the article at http://www.engineeringtoolbox.com/34_54.html the main parameters are diameter of the impellers and the rpm of the pump. Clicking on "the Affinity Laws" link, their equations don't take anything into account for the impeller shape. It could be they are assuming some optimized design, or that a different diamenter pump is the same design. In any case, if you want to try something different, we can work something out when I get the pump back from Paul L. Bob White On Fri, 19 Nov 2004 12:52:51 -0500 Dale Rogers wrote: > Finn wrote: > > > One interesting point though is the impeller. Looks like there might > > be room for improvement. Someone could make an optimized design and > > make a mold and sell "aftermarket" impellers for this pump :) > > Assuming that the current design is not already ideal... > > Same idea I had. I can't afford the pump at this point, > but if someone that already has one could send me the > dimensions of the current impeller, and the cavity in > which it spins ... > > Dale R. > Have machine tools, will make chips. > > PS - does the shaft have a flat spot for the set screw, > or a keyway for indexing? > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (soon)