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 ; Thu, 8 Apr 1999 08:58:49 -0400 Received: from Xi (sd-ppp-292.abac.net [208.137.255.192]) by smtp.abac.com (8.8.8/8.8.8) with SMTP id GAA27850 for ; Thu, 8 Apr 1999 06:00:59 -0700 (PDT) Message-Id: <4.1.19990408051046.00a99450@mail1.abac.com> Message-Id: <4.1.19990408051046.00a99450@mail1.abac.com> Date: Thu, 08 Apr 1999 05:18:23 -0700 To: From: Buchanan & Newcomer Subject: Options for new LNC2 360 In-Reply-To: <19990408041401.AAA132@truman.olsusa.com> X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Greg, The strength to weight ratios of E-glass and intermediate modulus carbon in similar epoxy laminate are surprisingly similar. However the carbon laminate will be about twice as stiff. I would guess the main effect would be to raise the flutter speed but I couldn't tell you how much. (Do they publish a different Vne?) As I've never heard a comment on global stiffness in conjunction with plastic airplanes, I assume you wouldn't be able to tell the difference in flight. (Doubling the stiffness at the same weight only increases structural frequencies 40%, not usually a noticeable difference.) Guy Buchanan Buchanan & Newcomer >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html