Return-Path: Received: from smtp5.teleport.com ([192.108.254.44]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Sat, 1 Apr 2000 14:04:41 -0500 Received: (qmail 1867 invoked from network); 1 Apr 2000 19:01:36 -0000 Received: from user2.teleport.com (qmailr@192.108.254.12) by smtp5.teleport.com with SMTP; 1 Apr 2000 19:01:36 -0000 Received: (qmail 24321 invoked by uid 40179); 1 Apr 2000 19:01:35 -0000 Date: Sat, 1 Apr 2000 11:01:35 -0800 (PST) From: Don Skeele To: Lancair Subject: Fuel management In-Reply-To: <20000401060020.AAA3683@ns1.olsusa.com> Message-ID: X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> $.02 from a 235/320 owmer on a fuel system that has worked for 600m hrs, no probs. 320J has a 12 gal day tk and two 15 gal wing tks. The day tank has a sight guage with an 1/8" valve for shut off purposes on the bottom, easily reachable from PIC position. The wing tanks run through Facet Fuel Pumps, (under seat pans)to the day tank running alongside the sight guage on the instrument panel. All tubing is clear 1/8" polyurathane which is chafed with electrical tape when going through instrument panel or through epoxy walls, etc. All three lines are visible to the pilot. There are no gauges or sensors in this approach, except a high fuel level in the day tank to keep from pumping overboard if Idope off. OPERATION: After burning off 5 to 6 gals from the day tank, I start both facet fuel pumpsand time each pumpinglength, I know that I have 40 minutes of cumulative pumping time to drain the 30 gal wing tanks and visual evidence when each tank runs dry, (bubbles appear in clear tbg flow lines and the Facet pumps speed up) There are no valves to switch, no fuel gauges, and I know positively when tanks are dry and I can time fuel usage using the calibrated sight guage. Peace of mind, knowing that if the Pumps fail, or whatever I can fly for mas o menos 1 hour with the day tank volume, from 5 to 12 gals. Too many fuel lines in cockpit area ?? With the day tank, you have only one additional, for the sight gauge. Have had this system for about 10 years, I change Polyurathane tubing every 4 years as precaution, old tbg looks good even at the hose clamp areas.. I hate to rely on gauges when I'm popeye and destination is a stretch with 300'and a half... Don Skeele DPSKE@Teleport.com (503)769-2563 dpske@teleport.COM >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>