X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rtp-iport-2.cisco.com ([64.102.122.149] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2607226 for flyrotary@lancaironline.net; Thu, 20 Dec 2007 14:53:59 -0500 Received-SPF: softfail receiver=logan.com; client-ip=64.102.122.149; envelope-from=echristley@nc.rr.com Received: from rtp-dkim-1.cisco.com ([64.102.121.158]) by rtp-iport-2.cisco.com with ESMTP; 20 Dec 2007 14:53:17 -0500 Received: from rtp-core-1.cisco.com (rtp-core-1.cisco.com [64.102.124.12]) by rtp-dkim-1.cisco.com (8.12.11/8.12.11) with ESMTP id lBKJrG9T024948 for ; Thu, 20 Dec 2007 14:53:16 -0500 Received: from xbh-rtp-211.amer.cisco.com (xbh-rtp-211.cisco.com [64.102.31.102]) by rtp-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id lBKJrGfr017545 for ; Thu, 20 Dec 2007 19:53:16 GMT Received: from xfe-rtp-201.amer.cisco.com ([64.102.31.38]) by xbh-rtp-211.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 20 Dec 2007 14:53:07 -0500 Received: from [64.102.38.143] ([64.102.38.143]) by xfe-rtp-201.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 20 Dec 2007 14:53:07 -0500 Message-ID: <476AC82D.70105@nc.rr.com> Date: Thu, 20 Dec 2007 14:53:17 -0500 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Thunderbird 1.5.0.14pre (X11/20071023) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: superchargers electric References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 20 Dec 2007 19:53:07.0712 (UTC) FILETIME=[F11BB800:01C84341] Authentication-Results: rtp-dkim-1; header.From=echristley@nc.rr.com; dkim=neutral Ed Anderson wrote: > I guess IF I really thought it was credible, I would have my $99.00 check in the mail and I don't. > > They're being sold on eBay, right? Could very well be that a well funded company lost their funding when the product just wouldn't sale, and eBayers are the beneficiaries of the fallout. I think one sanity check you can fall back on is the simple physics models we were using earlier. You know the CFM the engine is using, and how much extra air will be needed to give an advertised head pressure. Check to see if that is possible with 1.5Hp. We computed earlier that 600CFM of standard pressure and temperature air will require just over 3Hp to accelerate from 0 to 220fps. (220fps equates to about 0.5psi of head pressure according to http://www.iflyez.com/manometer.shtml ) For a 1.5Hp electric motor, the most you could ever hope to get is .5psi of boost for a 300CFM engine.