Return-Path: Received: from web4805.mail.yahoo.com ([216.115.105.247]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Thu, 23 Nov 2000 09:08:40 -0500 Received: from [4.48.87.1] by web4805.mail.yahoo.com; Thu, 23 Nov 2000 06:16:25 PST Message-ID: <20001123141625.24227.qmail@web4805.mail.yahoo.com> Date: Thu, 23 Nov 2000 06:16:25 -0800 (PST) From: Charlie Kohler Subject: Fuel System To: Lancair List X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Re; Fuel Systems. Several points to ponder regards modifying Lancair construction manual directions. 1. Instructions from insurance companys require authorized inspectors to report deviations from manual. That will then disqualify airplane for insurance. 2. A study of accident records show a high percentage of engine failures (in homebuilts) is due to fuel system design/modification/contamination. Any fuel filtration system that doesn't allow a bypass when clogged with contaminates should be rejected. No filter should be placed prior to the electric pump. (You have no way to push fuel through) Standard gascolators at lowest point of the firewall are best and should be checked prior to flight. Vents are also an issue. One (only), and NO yellow tubing. Recently had a IV with engine problems- engine hesitation/ leaning etc,etc,. Two fuel pump rebuilds. Turned out to be Yellow vent hose. (After flying ok for 5 years). Bad/sloppily built NACA vent scoops are also problems. Edges should be sharp- cover over tube should be 1/2". ===== Charlie Kohler >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>