X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 08 Jan 2008 15:23:25 -0500 Message-ID: X-Original-Return-Path: Received: from global.delionsden.com ([66.150.29.112] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTPS id 2635216 for lml@lancaironline.net; Mon, 07 Jan 2008 18:11:50 -0500 Received-SPF: none receiver=logan.com; client-ip=66.150.29.112; envelope-from=n103md@yahoo.com Received: from bmackey by global.delionsden.com with local (Exim 4.62) (envelope-from ) id 1JC137-0007M5-4n; Mon, 07 Jan 2008 18:06:29 -0500 Received: from 12.146.139.19 ([12.146.139.19]) (SquirrelMail authenticated user bmackey) by www.bmackey.com with HTTP; Mon, 7 Jan 2008 15:06:29 -0800 (PST) X-Original-Message-ID: <23163.12.146.139.19.1199747189.squirrel@www.bmackey.com> X-Original-Date: Mon, 7 Jan 2008 15:06:29 -0800 (PST) Subject: Legacy Wing Bolt Torque Specs From: "bob mackey" X-Original-To: lml@lancaironline.net X-Original-Cc: pinetownd@volcano.net User-Agent: SquirrelMail/1.4.9a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - global.delionsden.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [32015 2012] / [47 12] X-AntiAbuse: Sender Address Domain - yahoo.com X-Source: X-Source-Args: X-Source-Dir: OK... so I'm the guy who discusses the quantum mechanics of the lightbulb... Anyway, the tension on the Legacy wing spar bolt should be sufficient to clamp the the two spars together so that they have enough friction to resist motion under all operating loads. In other words, the bolts are never in shear, always in tension. The shear loads are taken by the spar faces that are clamped together. The spar bolts should be torqued tight. The aluminum inserts in the spar should take a compressive load comparable to the bolt's tensile strength. The joint is designed so that you don't have to worry about crushing carbon or core when tightening the bolt. I don't remember the bolt diameter, but I expect that it should be tightened to the nominal torque for that size and thread of AN bolt. -bob mackey