X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from omr-m02.mx.aol.com ([64.12.143.76] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTPS id 6723184 for lml@lancaironline.net; Fri, 07 Feb 2014 16:11:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.143.76; envelope-from=Sky2high@aol.com Received: from mtaomg-mba01.mx.aol.com (mtaomg-mba01.mx.aol.com [172.26.133.111]) by omr-m02.mx.aol.com (Outbound Mail Relay) with ESMTP id 98364701DF2DD for ; Fri, 7 Feb 2014 16:11:17 -0500 (EST) Received: from core-mlc005b.r1000.mail.aol.com (core-mlc005.r1000.mail.aol.com [172.29.188.211]) by mtaomg-mba01.mx.aol.com (OMAG/Core Interface) with ESMTP id 5A26C38000082 for ; Fri, 7 Feb 2014 16:11:17 -0500 (EST) From: Sky2high@aol.com Full-name: Sky2high Message-ID: <79fe7.3518c311.4026a5f5@aol.com> Date: Fri, 7 Feb 2014 16:11:17 -0500 (EST) Subject: Re: [LML] Re: Angle of attack To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_79fe7.3518c311.4026a5f5_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1391807477; bh=TbWS0fwoi14S680OmjGbe72ZPxuoExVJ+h/6viCHM6k=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=GC8MotBwjfPMHqWORdsveg9Zk1MVUekc5zi/j5pl61KZl/MVql/PRvPPQXxYTXnYW e6RHyR3IHGpAL875BHu11ipWqjeuuGerEhtFwBfizcEUYSJGcRwSRWavrvXZs9IBbc 0dltJAREwy9UxSb9Q4dGBohGopL5o6huL3a23ldg= x-aol-sid: 3039ac1a856f52f54bf556ff --part1_79fe7.3518c311.4026a5f5_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit OK, 1 or 2. Its all relative. Not every wing stalls at 14 degrees AOA. Higher loading, more lift, higher AOA. Isn't the cruise AOA, at the design range of density altitude and at minimal weight different than that at max gross weight? Perhaps the device mentioned wants some arbitrary number as a start for the straight line function. The Advanced System AOA uses two points on the straight line , determined in flight, to calibrate that device. Remember it measures pressure differential between the upper and lower wing surface that takes into account density altitude and loading along with pitot and static pressure. Scott In a message dated 2/7/2014 10:57:10 A.M. Central Standard Time, douglasbrunner@earthlink.net writes: Question for all the aerodynamicists out there. If a plane is flying, its wing must be generating lift. Does a wing generate lift at a zero degree angle of attack? I thought that there must be some positive angle of attack in level flight. Am I wrong about this? And if I am right, shouldn't the angle of attack be set to some small positive number? -----Original Message----- From: Sky2high@aol.com Sent: Feb 7, 2014 9:46 AM To: lml@lancaironline.net Subject: [LML] Re: Angle of attack Tom, Interesting. The wing has wash out so different parts of the wing are at slightly different AOAs (think propagation of stall). The design has the longeron at zero degrees at cruise, flaps at reflex (think chord line from leading edge to flap TE). Even average angle of incidence doesn't work because of wing/flap design. Why not use zero, 1 or 2? Scott krueger In a message dated 2/7/2014 8:16:45 A.M. Central Standard Time, n20087@yahoo.com writes: > Folks I am about to setup a g3x in my 360. I was wondering if anybody could tell me what the typical cruise angle of attack might be Thanks Tom -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --part1_79fe7.3518c311.4026a5f5_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
OK, 1 or 2.  Its all relative.  Not every wing stalls at 14= =20 degrees AOA.  Higher loading, more lift, higher AOA.  Isn't the= =20 cruise AOA, at the design range of density altitude and at minima= l=20 weight different than that at max gross weight?  Perhaps the devi= ce=20 mentioned wants some arbitrary number as a start for the straight line= =20 function. 
 
The Advanced System AOA uses two points on the straight line , determi= ned=20 in flight, to calibrate that device.  Remember it measures pressure=20 differential between the upper and lower wing surface that takes into= =20 account density altitude and loading along with pitot and static=20 pressure.
 
Scott 
 
In a message dated 2/7/2014 10:57:10 A.M. Central Standard Time,=20 douglasbrunner@earthlink.net writes:
= Question for= all the=20 aerodynamicists out there.=20

I= f a plane=20 is flying, its wing must be generating lift.  Does a wing generate l= ift=20 at a zero degree angle of attack?

I= thought=20 that there must be some positive angle of attack in level flight.  A= m I=20 wrong about this?

A= nd if I am=20 right, shouldn't the angle of attack be set to some small positive=20 number?
 -----Original=20 Message-----
From: Sky2high@aol.com
Sent: Feb 7, 2014 9:46 AM= =20
To: lml@lancaironline.net
Subject: [LML] Re: Angle of attack=20

Tom,
 
Interesting.  The wing has wash out so different parts of the= wing=20 are at slightly different AOAs (think propagation of stall).  The= =20 design has the longeron at zero degrees at cruise, flaps at reflex (thi= nk=20 chord line from leading edge to flap TE).  Even average angle of= =20 incidence doesn't work because of wing/flap design.  Why not use z= ero,=20 1 or 2?
 
Scott krueger
 
In a message dated 2/7/2014 8:16:45 A.M. Central Standard Time,=20 n20087@yahoo.com writes:
>=20 Folks

I am about to setup a g3x in my 360.  I was wonder= ing=20 if anybody could tell me what the typical cruise angle of attack migh= t=20 be

Thanks

Tom
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For archives and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html

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