Return-Path: Received: from cdihost.cdicorp.com ([207.79.152.5]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Fri, 27 Oct 2000 12:37:12 -0400 Received: from HQ-EDI by cdihost.cdicorp.com via smtpd (for ns1.olsusa.com [205.245.9.2]) with SMTP; 27 Oct 2000 16:44:39 UT Received: from cdim-pts-mail.cdicorp.com (CDIM-PTS-MAIL [172.17.131.3]) by hq-edi.cdicorp.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id VTG731BD; Fri, 27 Oct 2000 12:44:37 -0400 Received: by CDIM-PTS-MAIL with Internet Mail Service (5.5.2650.21) id <4GQXP4DK>; Fri, 27 Oct 2000 12:44:35 -0400 Message-ID: From: "Rumburg, William" To: lancair.list@olsusa.com Subject: Re: Autogas Date: Fri, 27 Oct 2000 12:44:34 -0400 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> ERic, Rob Wolf and Brent - James Anderson of Leyland, England wrote an interesting discussion regarding the use of automobile gas, including a calculation of octane requirements for aviation piston engines on page 8 of the September issue of Sport Aviation. If you recall, the widespread introduction of electronic fuel injection in automotive engines during the mid-1980's required that auto fuel be 'cleaned up' so as not to build up contaminates in auto engine injectors, which are smaller than those on aviation engines. In addition to octane requirements, the other major potential problem with auto gas is vapor pressure. 'Summer' formulation auto gas (Mogas is a misnomer since fuel is burned in an engine, not a motor) has a Reed vapor pressure (RVP) of .47 - .7 BAR. This compares with a RVP of .5 - .6 BAR for 100 LL. Auto gas for aviation engines could easily be drawn from standard stocks, boosted to 95 octane using currently available non-lead additives and formulated for vapor pressures comparable to that of 100 LL. > Besides octane requirements, the other major potential problem with auto > gas is vapor pressure. 'Summer formulation' auto gas (Mogas is a misnomer > since this gas is burned in an engine, not a motor) has a Reed vapor > pressure (RVP) of .47 - .7 BAR. This compares with a RVP of .5 - .6 BAR > for 100 LL. Europe has already outlawed 100 LL after 2003. How long after that do you believe that it will be available in the U.S.? > Bill Rumburg > N403WR (Sonic bOOm) > > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>