Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Thu, 27 Jan 2005 09:16:37 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d20.mx.aol.com ([205.188.139.136] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 624506 for lml@lancaironline.net; Thu, 27 Jan 2005 08:50:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.136; envelope-from=MikeEasley@aol.com Received: from MikeEasley@aol.com by imo-d20.mx.aol.com (mail_out_v37_r3.8.) id q.1c5.2246c085 (25305) for ; Thu, 27 Jan 2005 08:49:48 -0500 (EST) From: MikeEasley@aol.com X-Original-Message-ID: <1c5.2246c085.2f2a4b7c@aol.com> X-Original-Date: Thu, 27 Jan 2005 08:49:48 EST Subject: Re: [LML] Re: NACA64212 Airfoil X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1106833788" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1106833788 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Since my ES wings have a difference in washout, I was concerned. That's how a lot of this discussion got started. And why I talked to Mr. Hollmann. Since my "relative" measurements were done that showed a 1.7 degree difference in incidence at the tips, I have done measurements with actual incidence. My biggest concern was that I had, for example, 1 degree of washout on one wing and .7 degree negative washout (if there is such a term) on the other wing. That would cause the tip to stall first with the 64212 airfoil. But I have 2.2 degrees on the right wing and .5 degrees on the left wing, so I do have some washout on both sides. Keep in mind, that's at the tip. If you move inboard 2 feet the difference in down to a much smaller number. Not ideal, but not a death trap. Mike Easley Colorado Springs -------------------------------1106833788 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Since my ES wings have a difference in washout, I was concerned. =20 That's how a lot of this discussion got started. And why I talked to M= r.=20 Hollmann.

Since my "relative" measurements were done that showed a 1.7 degree=20 difference in incidence at the tips, I have done measurements with actual=20 incidence.

My biggest concern was that I had, for example, 1 degree of washout on=20= one=20 wing and .7 degree negative washout (if there is such a term) on the other=20 wing. That would cause the tip to stall first with the 64212=20 airfoil.

But I have 2.2 degrees on the right wing and .5 degrees on the left win= g,=20 so I do have some washout on both sides. Keep in mind, that's at the=20 tip. If you move inboard 2 feet the difference in down to a much small= er=20 number. Not ideal, but not a death trap.

Mike Easley

Colorado Springs

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