Return-Path: Received: from [24.93.67.82] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2630267 for flyrotary@lancaironline.net; Thu, 09 Oct 2003 12:34:55 -0400 Received: from ms-mss-03-ce0-1 ([10.25.8.213]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with ESMTP id h99GYtLd027918 for ; Thu, 9 Oct 2003 12:34:55 -0400 (EDT) Received: from southeast.rr.com (localhost [127.0.0.1]) by ms-mss-03.southeast.rr.com (iPlanet Messaging Server 5.2 HotFix 1.12 (built Feb 13 2003)) with ESMTP id <0HMI007JY0Q7IB@ms-mss-03.southeast.rr.com> for flyrotary@lancaironline.net; Thu, 09 Oct 2003 12:34:55 -0400 (EDT) Received: from [10.10.1.26] by ms-mss-03.southeast.rr.com (mshttpd); Thu, 09 Oct 2003 12:34:55 -0400 Date: Thu, 09 Oct 2003 12:34:55 -0400 From: echristley@nc.rr.com Subject: Re: [FlyRotary] Re: EWP - Success at last? To: Rotary motors in aircraft Reply-to: echristley@nc.rr.com Message-id: MIME-version: 1.0 X-Mailer: iPlanet Messenger Express 5.2 HotFix 1.12 (built Feb 13 2003) Content-type: text/plain; charset=us-ascii Content-language: en Content-transfer-encoding: 7BIT Content-disposition: inline X-Accept-Language: en Priority: normal >> 1) The pumps could > > have differing efficiencies. That's possible but it doesn't > > explain the magnitude nor why auto manufacturers would persist > > with an inferior pump design if reverse engineering a Davies > > Craig pump could yield such superior results. How long did it take American manufacturers to wake up to the fact that the oriental's were eating their lunch? Why would they change out a part that has worked reliably for 100yrs and replace it with something that will provide very little benefits. Remember most auto engines rarely rev up to 6000rpm, and never for long. The rotary is notable in that it does rev higher than most, but even then it doesn't stay at those high revs. It's even more notable in an airplane, as it tends to rev high and stay there.