Return-Path: Received: from smtp.burgoyne.com ([209.197.0.17]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Sat, 22 Apr 2000 11:59:15 -0400 Received: from burgoyne.com (pmd.burgoyne.com [209.197.2.15]) by smtp.burgoyne.com (8.9.3/8.9.1) with ESMTP id KAA28323 for ; Sat, 22 Apr 2000 10:04:57 -0600 Message-ID: <3901CCE3.82A2B8B4@burgoyne.com> Date: Sat, 22 Apr 2000 10:01:40 -0600 From: "C.L.Keller" To: Lancair Mail List Subject: Header Tank level sensor locations, Wing panel vents X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Re: Ed Sikora's question about locations of fuel sensors in the header tank. I am planning to install two optical sensors to control the transfer circuit and my present plan is to put them at one and two inches from the top of the tank. I have measured the tank capacity and liquid depth up to six gallons (the maximum the tank will hold without being bonded against the forward deck, and calculated the quantities for levels from there to the top. Came out with a nominal 11 gallons capacity. The one inch sensor will turn the pumps off at 10.15 gallons, while the two inch sensor will turn them on at 8.75 gallons. If I drop the lower sensor down a quarter inch to 2.25 inches, the pumps will turn on at 8.25 gallons. This is theoretical, of course, but I'm going with it. If a problem develops with pumps turning on and off rapidly in turbulence, in spite of slosh baffles in the header tank, I can always add a time delay in the curcuitry that turns the pumps on. On the other subject, I discovered my 320/360 SFB outer wing panels have no air vents in the D-section, the closed leading edge forward of the main spar. There are four ribs, giving three unvented compartments. I can use a drill on a long extension to reach in and put a hole in the interior ribs, but don't know how to seal the honeycomb exposed by that hole. Perhaps that isn't a problem. How did other SFB builders handle this? Charles Keller >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>