Return-Path: Received: from server8.wans.net ([216.75.0.36]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA8139 for ; Wed, 18 Nov 1998 12:13:09 -0500 Received: (from uucp@localhost) by server8.wans.net (8.8.8/8.8.8) id LAA06618 for ; Wed, 18 Nov 1998 11:13:23 -0600 (CST) Received: from usm-0037-53.wans.net(208.205.37.69), claiming to be "oemcomputer" via SMTP by server8.wans.net, id smtpdAAAa001b3; Wed Nov 18 11:13:13 1998 Message-ID: <001301be1316$b2c02e20$4525cdd0@oemcomputer> From: "bobjude" To: "Lancair Mail List" Subject: 320/360 Jack Pads Date: Wed, 18 Nov 1998 11:13:00 -0600 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> At least two people have expressed their opinion that the 2" jack pads are not sufficient to support the weight of the aircraft. I beg to differ on this. If the jack points are sufficiently beefed up on the inside, they are more than adequate. As shown in the construction manual, a piece of 1/4 x 2 x 2 phenolic is potted into the belly pan. Probably, the 2 bid over the top of the phenolic is not enough. When I built my 320, I made a large flox fillet up to the main spar and close out rib and covered that with an additional 2 bid. This structure is strong enough to transfer the load to the main spar. May I suggest to those of you who are using 2 x 4 structures etc. to support your aircraft during construction that you need to think beyond the building stage. After your aircraft is flying you will periodically need to jack up your airplane for gear retraction testing on the ground, annual inspections, general maintenance etc.. Hopefully, you will have a jacking system that is convenient and easy to use. Happy Building Bob Jude N65BJ