Return-Path: Received: from sphmgaaa.compuserve.com ([149.174.177.150]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Wed, 25 Oct 2000 00:24:41 -0400 Received: (from mailgate@localhost) by sphmgaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id AAA17102 for lancair.list@olsusa.com; Wed, 25 Oct 2000 00:32:03 -0400 (EDT) Date: Wed, 25 Oct 2000 00:31:15 -0400 From: James Frantz Subject: lancair.list V1 #193 Sender: James Frantz To: "INTERNET:lancair.list@olsusa.com" Message-ID: <200010250031_MC2-B844-A85@compuserve.com> X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Message text written by INTERNET:lancair.list@olsusa.com > However, two wing tie downs angled at 45 degrees gives a combined capability of 2*1570 = 3140 pounds, which should be more than enough. How strong a rope are you using, anyway?< I was in Renton, Washington and had my aircraft tied down using the airport chains clipped to the quick release ball lock units. The tie down at Renton are designed for a larger aircraft than the Lancair, so the angles were quite large putting the pins in bending stress. A friend of mine, tripped over the chain and broke the quick release at its neck. Using Rob's numbers and the mechanical advantage due to the chain being strung from the wing to the tie down, it is easy to see how the bending stress can be exceeded. It is the same principle used to pull a large boat closer to the dock. You don't pull on the line. You cleat the mooring line to the dock, snug it up and then step in the middle of the line. The boat easily moves to the dock. After this incident, and after inspecting the quick release where it broke, I concluded that the quick release was not for me as I mentioned earlier. Jim Frantz >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>