Return-Path: Received: from pop3.olsusa.com ([63.150.212.2] verified) by logan.com (CommuniGate Pro SMTP 3.5.1) with ESMTP id 1001266 for rob@logan.com; Fri, 04 Jan 2002 06:55:02 -0500 Received: from out003pub.verizon.net ([206.46.170.103]) by pop3.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-71866U8000L800S0V35) with ESMTP id com for ; Thu, 3 Jan 2002 09:21:55 -0500 Received: from GCasey (calnet31-66.gtecablemodem.com [207.175.254.66]) by out003pub.verizon.net with SMTP for ; id g03EMxb08244 Thu, 3 Jan 2002 08:22:59 -0600 (CST) Reply-To: Reply-To: lancair.list@olsusa.com From: "Gary Casey" To: Subject: engines Date: Thu, 3 Jan 2002 06:21:26 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit In-Reply-To: <20020103053553.AAA22837@pop3.olsusa.com> Importance: Normal X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> >>Gents: A loud "right on" to the techy engine talk. I like it--and hope Jack, George, Gary and the rest of you engine gurus and wannabe gurus continue the debate. I am also learning new and wonderful ways to insult people nicely,.... And remembering that anecdote is singular for data, many anecdotes plotted together might yield insight. Oh--what is FMEP??<< I was afraid that our engine "discussions" were getting a little off the Lancair track - I for one groove on them, but others might not. One thing I really like about this list is its civility - at least compared to others - and I agree that we need to be careful in our comments and not say anything that we wouldn't say in person (Try getting on the rotary engine list and just asking about BSFC - wow.). I'm sure someone has answered the question by now, but FMEP is "Friction Mean Effective Pressure" usually in the units of psi and it is essentially ft-lbs of friction per cu. in. displacement. Another one is IMEP (Indicated Mean Effective Pressure) where "indicated" comes from the old steam engine days where they used an indicator card to trace pressure vs. stoke. Nowadays friction torque is usually measured by motoring the engine and indicated torque is derived by adding friction to brake torque (here I really should say "contrived" because engine friction is not quite the same motoring as it is running). Indicated torque really means the torque generated by the actual gas pressure in the cylinder. Just to complete the trivia "Brake" torque got its name because steam engines were tested by applying a friction brake to the output shaft and measuring the force at the end of an arm (Called the "Prony Brake" after the French inventor, G.C.F.M. Riche, Baron de Prony). Now top that one... Gary Casey Now building a dyno for my engine - an ES >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://members.olsusa.com/mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please remember that purchases from the Builders' Bookstore assist with the management of the LML. Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>