Return-Path: Sender: (Marvin Kaye) To: lml Date: Mon, 11 Aug 2003 10:58:15 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m07.mx.aol.com ([64.12.136.162] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2517304 for lml@lancaironline.net; Mon, 11 Aug 2003 10:24:28 -0400 Received: from Sky2high@aol.com by imo-m07.mx.aol.com (mail_out_v36_r1.1.) id q.33.3c8b5c7b (3842) for ; Mon, 11 Aug 2003 10:24:18 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <33.3c8b5c7b.2c690111@aol.com> X-Original-Date: Mon, 11 Aug 2003 10:24:17 EDT Subject: Re: [LML] fuel tank pressure X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1060611857" X-Mailer: 9.0 for Windows sub 580 -------------------------------1060611857 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 8/11/2003 7:54:15 AM Central Daylight Time, glcasey@adelphia.net writes: Regardless of how you think of it the wing will experience relative pressures in the range of 1 psi in service so that is probably a reasonable pressure at which to test. 5 psi may not be reasonable. Gary, You had to be there to hear how much air and vaporized fuel came out the vent and how much the skin was distorted although I am sure it was nowhere near 5 psi. In any event, the 320/360 wings are built upside down so the spars and ribs are well attached to the upper skin with 2 bid reinforcing such construction. The wing bottom is merely glued on (in my case with the Lancair supplied 3M fuel proof bonding material, not Hysol) to the spars and flox filled/fitted 5/8" rib cross sections. As I said, this was the pre cap strip technique and I would feel a lot better if I was always flying inverted. Note that it is the top wing skin of the Legacy that is glued on and all the ribs are built with at least 1.25 inch flanges (cap strips)! It's incredible that the whole thing stays together since I seldom fly out of the yellow arc, even in turbulence. Clean Sand Clean Clean Glue Scott Krueger Sky2high@aol.com LNC2 N92EX IO320 Aurora, IL (KARR) -------------------------------1060611857 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 8/11/2003 7:54:15 AM Central Daylight Time, glcasey@= adelphia.net writes:

Regardless of how you think of it the wing wil= l experience relative
pressures in the range of 1 psi in service so that=20= is probably a reasonable
pressure at which to test. 5 psi may not b= e reasonable.

Gary,

You had to be there to hear how much air and vaporized fuel came o= ut the vent and how much the skin was distorted although I am sure it was no= where near 5 psi. In any event, the 320/360 wings are built upside dow= n so the spars and ribs are well attached to the upper skin with 2 bid reinf= orcing such construction. The wing bottom is merely glued on (in my ca= se with the Lancair supplied 3M fuel proof bonding material, not Hysol) to t= he spars and flox filled/fitted 5/8" rib cross sections. As I said, th= is was the pre cap strip technique and I would feel a lot better if I was&nb= sp;always flying inverted. Note that it is the top wing skin of t= he Legacy that is glued on and all the ribs are built with at least 1.25 inc= h flanges (cap strips)!

It's incredible that the whole thing stays together since I seldom fly=20= out of the yellow arc, even in turbulence.

Clean

Sand

Clean

Glue

Scott Krueger
Sky2high@aol.com
LNC2 N92EX IO320 Aurora, IL (KARR)

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