X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 05 Jun 2006 09:43:38 -0400 Message-ID: X-Original-Return-Path: Received: from mail.pshift.com ([63.166.217.30] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1140106 for lml@lancaironline.net; Sun, 04 Jun 2006 17:41:50 -0400 Received-SPF: none receiver=logan.com; client-ip=63.166.217.30; envelope-from=colyncase@earthlink.net Received: from ccaselt (unverified [216.57.118.189]) by mail.pshift.com (Vircom SMTPRS 4.35.477.0) with SMTP id for ; Sun, 4 Jun 2006 17:40:43 -0400 X-Modus-BlackList: 216.57.118.189=OK;colyncase@earthlink.net=OK X-Modus-RBL: 216.57.118.189=OK X-Modus-Trusted: 216.57.118.189=NO X-Original-Message-ID: <009601c6881f$857b1e80$0402a8c0@nvidia.com> From: "colyncase on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] David Hickman Crash X-Original-Date: Sun, 4 Jun 2006 14:40:38 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0093_01C687E4.D8B45CF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_0093_01C687E4.D8B45CF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Far as I can tell Martin did an awesome job on the structure of the = LIVP. Notably, Martin said to me "No one should ever stall a LIVP" I'm afraid I can't credit the statement "The wing tip is not designed to = stall and as such the question of how it stalls is not relevant" The = lift vs. AOA curve on that airfoil I can only describe as discontinuous. = It goes from 100% CL to 50% in a small fraction of a degree. (like less = than .2). Washout doesn't make that go away. If the root has stalled = and the tips are all that is flying and they are just a little bit = different in incidence, guess what happens next? Washout only gives = you a little more time to notice what is going on and get flying again = before that happens. =20 There is no question in my mind that you don't want to go there. I = think most of the community agrees. There is a huge question in my mind why experienced Lancair pilots get = there. I don't suppose I am better than any of them. but I wonder = what happens in your mind that you let it happen, and how you can = prepare for whatever THAT is. =20 Colyn ------=_NextPart_000_0093_01C687E4.D8B45CF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Far as I can tell Martin did an awesome = job on the=20 structure of the LIVP.

Notably, Martin said to me "No one = should ever=20 stall a LIVP"

I'm afraid I can't credit the statement = "The wing=20 tip is not designed to stall and as such the question of how it stalls = is not=20 relevant" The lift vs. AOA curve on that airfoil I can only = describe as=20 discontinuous. It goes from 100% CL to 50% in a small fraction of = a=20 degree. (like less than .2). Washout doesn't make that = go=20 away. If the root has stalled and the tips are all that is flying = and they=20 are just a little bit different in incidence, guess what happens=20 next? Washout only gives you a little more time to = notice what=20 is going on and get flying again before that happens. =

There is no question in my mind that = you don't want=20 to go there. I think most of the community agrees.

There is a huge question in my mind why = experienced=20 Lancair pilots get there. I don't suppose I am better = than any=20 of them. but I wonder what happens in your mind that you let = it=20 happen, and how you can prepare for whatever THAT is. =

Colyn

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