Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sun, 28 Dec 2003 16:03:55 -0500 Message-ID: X-Original-Return-Path: Received: from rhombus.bright.net ([209.143.0.75] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2908174 for lml@lancaironline.net; Sun, 28 Dec 2003 10:26:01 -0500 Received: from bright.net (paul-bryn-breeze-122.wireless.bright.net [216.201.20.123] (may be forged)) by rhombus.bright.net (8.12.10/8.12.10) with ESMTP id hBSFPuPw014679; Sun, 28 Dec 2003 10:26:00 -0500 (EST) X-Original-Message-ID: <3FEEF5FF.7070308@bright.net> X-Original-Date: Sun, 28 Dec 2003 10:25:51 -0500 From: J H Webb User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: "Sam McGowan" , Lancair Mailing List Subject: ES wing incidence Content-Type: multipart/alternative; boundary="------------060507050605020809090002" This is a multi-part message in MIME format. --------------060507050605020809090002 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit >I found the left 0.2 deg. greater than the right. >Does any one know what is acceptable? Yes this is about the largest difference that will allow good stall characteristics and flight efficiency. If you measure at 2 different locations on each wing and the error is less that .2 degrees average it should be good. I like measuring at the trailing edge of the tip inboard of the wingtip and the flap side of the flap aileron junction. This produces a good composite look at your wing average angle of incident. Greatly improved accuracy can be achieved by using a digital level. Jack Webb L 360, L IV ATP, CFI Airplanes & Instruments, Multi, & Sea Many Type Ratings Experienced Experimental Test Pilot both multi and single engine Former Chief Engineering Test Pilot for a Major Manufacturer AeroSpace Engineer BSAE Ohio --------------060507050605020809090002 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit

>I found the left 0.2 deg. greater than the right.
>Does any one know what is acceptable?

Yes this is about the largest difference that will allow good stall characteristics and flight efficiency.
	 If you measure at 2 different locations on each wing and the error is less that .2 degrees average it should be good.  I like measuring at the trailing edge of the tip inboard of the wingtip and the flap side of the flap aileron junction.  This produces a good composite look at your wing average angle of incident. 
	Greatly improved accuracy can be achieved by using a digital level.

Jack Webb
L 360, L IV
ATP, CFI Airplanes & Instruments, Multi, & Sea
Many Type Ratings
Experienced Experimental Test Pilot both multi and single engine
Former Chief Engineering Test Pilot for a Major Manufacturer
AeroSpace Engineer BSAE
Ohio

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