Return-Path: Received: from mta5.snfc21.pbi.net ([206.13.28.241]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Mon, 12 Jun 2000 02:19:00 -0400 Received: from postoffice.pacbell.net ([206.170.7.45]) by mta5.snfc21.pbi.net (Sun Internet Mail Server sims.3.5.2000.01.05.12.18.p9) with ESMTP id <0FW1004B834M6Q@mta5.snfc21.pbi.net> for Lancair.list@olsusa.com; Sun, 11 Jun 2000 23:24:26 -0700 (PDT) Date: Sun, 11 Jun 2000 23:20:18 -0700 From: fmoreno4@postoffice.pacbell.net Subject: Tank pressurization To: coy0te@pacbell.net, Lancair.list@olsusa.com Reply-to: fmoreno4@pacbell.net Message-id: <39448122.3580FB76@postoffice.pacbell.net> X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Walter: The ram pressure at about 210 knots indicated is about one psi, and that is about what you get into the little NACA scoops used to vent the tank. Fly at redline, 274 knots, and this becomes a bit less than 2 psi. So you might as well find out now if they can hold 2 psi. Expect lots of creaking and groaning, I would think. I have noted on several LIVs that then the sun grazes the wing from wing tip to fuselage, you can see the top skin bulge up between wing ribs, so there is some deformation occuring due to the pressurization, although the top wing skin is also in compression during normal flight which could also cause some of this effect. Fred >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>