Return-Path: Received: from smtp.abac.com ([208.137.248.30]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Tue, 26 Jan 1999 07:56:11 -0500 Received: from Xi (sd-ppp-264.abac.net [208.137.255.164]) by smtp.abac.com (8.8.8/8.8.8) with SMTP id EAA28496 for ; Tue, 26 Jan 1999 04:56:22 -0800 (PST) Message-Id: <4.1.19990126041923.00a09890@mail1.abac.com> Message-Id: <4.1.19990126041923.00a09890@mail1.abac.com> Date: Tue, 26 Jan 1999 04:24:49 -0800 To: From: Buchanan & Newcomer Subject: LC20 Hydrolic attach points In-Reply-To: <19990126053712.AAA15722@truman.olsusa.com> X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Pine, Phenolic rod generally has all significant fiber along the rod length with some light mat around it for surface control. It is pultruded, When you cut it into disks it has substantially less strength in the plane of the disk than a disk of cast plain epoxy. Normal to the disk it is somewhat stronger, though in thin disks the fibers just buckle under compression loading, blowing the disk apart. Your disk made from laminate has laminate strength in-plane and resin strength normal to the fibers. It is therefore useful as a reinforcement where high loads are parallel to the skin. (This is normally the case, since composite skins, even sandwich panels, can not take "high" loads perpendicular to the skins.) Guy Buchanan Buchanan & Newcomer