Return-Path: Received: from newsierra.bnis.net ([208.145.132.210]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Wed, 7 Jul 1999 00:41:15 -0400 Received: from gnaf (unverified [208.145.132.33]) by newsierra.bnis.net (Rockliffe SMTPRA 2.1.6) with SMTP id for ; Tue, 06 Jul 1999 21:37:26 -0700 Message-ID: <000a01bec833$9a6a5620$0200a8c0@gnaf> From: "Paul A. Nafziger" To: Subject: Severe Pitch Moment with Flap Extension Date: Tue, 6 Jul 1999 21:45:54 -0700 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> My friend has flown about 5 flights in his new 360. When he extends his flaps, he gets an extremely large pitch down moment. We're at a loss to explain why. The moment is large enough that he has yet to extend the flaps fully. All his landing thus far have been at 10 degrees or less. He slowly extends them until the stick forces get so high that they worry him. Both my friend and I are experienced test pilots who understand aerodynamics and flight control systems. Neither of us has an explanation, but I'm hoping one of you has had a similar incident. Have any of you experienced anything similar? Any ideas out there? Naf N7PN (90% done) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html