Return-Path: Received: from marvkaye.olsusa.com ([205.245.9.188]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with SMTP id AAA1440 for ; Mon, 12 Oct 1998 16:35:00 -0400 Message-Id: <3.0.3.32.19981012163419.00a54608@olsusa.com> Date: Mon, 12 Oct 1998 16:34:19 -0400 To: lancair.list@olsusa.com From: Lynda Frantz (by way of Marvin Kaye ) Subject: Fuel tank float switches X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Fuel tank float switches are far from ideal. The float is designed with enough volumn to displace fuel equal to its weight plus some. The problem is that in a turn or in turbulance the float will weigh more and probably sink. This will cause transfers of fuel when the tank is already full, false fuel low warnings and etc. There are optical fluid level switches that are not affected by "G" loads and cost only slightly more. I used two such switches with excellent results for my automatic fuel transfer and advisory system. Jim Frantz jim@angle-of-attack.com