Return-Path: Received: from blv-smtpout-01.boeing.com ([192.161.36.5]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Tue, 23 May 2000 10:46:11 -0400 Received: from blv-av-01.boeing.com ([192.54.3.60]) by blv-smtpout-01.boeing.com (8.9.2/8.8.5-M2) with ESMTP id HAA03331 for ; Tue, 23 May 2000 07:52:08 -0700 (PDT) Received: from blv-hub-01.boeing.com (localhost [127.0.0.1]) by blv-av-01.boeing.com (8.9.2/8.9.2) with ESMTP id HAA19427 for ; Tue, 23 May 2000 07:52:07 -0700 (PDT) Received: from xch-mwbh-01.stl.mo.boeing.com by blv-hub-01.boeing.com with ESMTP for lancair.list@olsusa.com; Tue, 23 May 2000 07:53:16 -0700 Received: by xch-mwbh-01.mdc.com with Internet Mail Service (5.5.2650.21) id ; Tue, 23 May 2000 09:51:53 -0500 Message-Id: <417BA1959096D211BF270008C7A4375A0128709A@xch-stl-02.mdc.com> From: "Field, Peter B" To: "'lancair.list@olsusa.com'" Subject: RE: Unintentional Spin - Lessons Learned Date: Tue, 23 May 2000 09:51:50 -0500 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Just a few comments on Bob Chesley's unintentional incipient spin. At the higher angles of attack seen just prior to stall most of the vertical tail is going to be blanked by the fuselage and wings, hence the wallowing around Bob experienced. With this considerable loss of normal directional stability one might need to pick a point out on the horizon and attempt to keep the airplane relatively pointed straight by working the rudders quickly. I think Doug Weeldryer is right, the needle ball lags way too much to be of use under these conditions. Also, any input of lateral control will create lots of adverse yaw. The down going aileron will create considerably more drag compared to the up going one and very quickly help to create a departure, so it's important to use as little aileron as possible when investigating stalls. The very smooth Lancair airframe is going to give less warning of stall and will break more abruptly than the "spam cans" with their relatively rough draggy exteriors. Bob, I think you needn't feel any loss of pride. You did several things right, being at 9000 feet, entering the stall slowly (one knot per second is a standard), and instinctively stopping the yaw. Pretty good handling of the situation, I say. One ought not to be so unfamiliar with the stall characteristics of the airplane that something like this surprises you in the pattern. Being thoroughly familiar with the stall characteristics is really important, but go and investigate stalls after you have enough time in the airplane to be comfortable. For some it may be as little as 10 or 20 hours, others will need more, maybe 100 hours. Thanks for sharing the experience. Cheers, Pete >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>