Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sun, 23 Jan 2005 17:34:36 -0500 Message-ID: X-Original-Return-Path: Received: from mpmail6.accesstoledo.com ([208.16.180.242] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 618614 for lml@lancaironline.net; Sun, 23 Jan 2005 16:21:21 -0500 Received-SPF: neutral receiver=logan.com; client-ip=208.16.180.242; envelope-from=bknotts@earthlink.net Received: from comp21intel32 (unverified [63.164.250.153]) by buckeye-express.com (Rockliffe SMTPRA 5.3.11) with ESMTP id for ; Sun, 23 Jan 2005 16:20:51 -0500 From: "F. Barry Knotts" X-Original-To: "Lancair Mailing List" Subject: RE: Alert. NACA 64212 X-Original-Date: Sun, 23 Jan 2005 16:24:19 -0500 X-Original-Message-ID: <000001c50191$e67f1120$8119fea9@comp21intel32> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C50167.FDA90920" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C50167.FDA90920 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable ..the wingtip profile used for Lancair IV's and ES's. It has an unusual characteristic in that when reaching or exceeding 22 degrees AoA, then = with reducing AoA the coefficient of lift decreases. Roberto d'Italia. =20 This analysis is very interesting (not to mention, alarming). And it is = a subject that I have very little knowledge about. One additional topic = that I have not seen discussed on LML is the effect of the addition of the winglet wingtips to the Lancair IV wing. What are the effects with = regard to the stall/spin characteristics that might be predicted with the = winglets? Of the L-IV's that have been involved in the stall/spin/splat = incidents.how many had winglets? =20 Barry Knotts LIV-P, Conti TSIO 550, mostly listening. =20 ------=_NextPart_000_0001_01C50167.FDA90920 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

….the wingtip profile used for Lancair IV's and = ES's. It has an unusual characteristic in that when reaching or exceeding 22 = degrees AoA, then with reducing AoA the coefficient of lift = decreases… Roberto d'Italia.

This analysis is very interesting (not to mention, = alarming). And it is a subject that I have very little knowledge about. One = additional topic that I have not seen discussed on LML is the effect of the = addition of the winglet wingtips to the Lancair IV wing. What are the effects = with regard to the stall/spin characteristics that might be predicted with = the winglets? Of the L-IV’s that have been involved in the stall/spin/splat incidents…how many had = winglets?

Barry Knotts

LIV-P, Conti TSIO 550, mostly listening…

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