X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 18 Apr 2012 11:00:39 -0400 Message-ID: X-Original-Return-Path: Received: from nm17-vm0.bullet.mail.bf1.yahoo.com ([98.139.213.157] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with SMTP id 5486282 for lml@lancaironline.net; Wed, 18 Apr 2012 01:27:59 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.213.157; envelope-from=chris_zavatson@yahoo.com Received: from [98.139.212.153] by nm17.bullet.mail.bf1.yahoo.com with NNFMP; 18 Apr 2012 05:27:23 -0000 Received: from [98.139.212.244] by tm10.bullet.mail.bf1.yahoo.com with NNFMP; 18 Apr 2012 05:27:23 -0000 Received: from [127.0.0.1] by omp1053.mail.bf1.yahoo.com with NNFMP; 18 Apr 2012 05:27:23 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 841488.5279.bm@omp1053.mail.bf1.yahoo.com Received: (qmail 41849 invoked by uid 60001); 18 Apr 2012 05:27:23 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=nMQqHCOYmGcL6U5x+Yq8trvzZ1DnCYCYuJwHsynLNAdctlvc2dF3ydncCniXGubY1IBAqgaHfZxlaVy/vspHis+O8b+9gl9LKu9rWuKaqU33WMgYsUXw/03POXS4uakxgfxW0O4RTWLeJ3S41Gg3C3vLdQgsQQUuOsCYQIK/EaE=; X-YMail-OSG: tBqVDPYVM1lYn5FxwXF1S83.LZPhEAH3Mq0p_zVJSLZ1zPD 6w99btEOIEqqcXM7YrwKEZbZJAJHFMQcUOekMku0gpbBvEMhaUV4vAo3V8m0 Aw3YOOwwoiO.zdY9BDC4IFiogzHD48iktaJGVeQS1pclCJ5aGDo_J5jmvOIa Tpv2cXGQ0HPWG_JxH5ci5VduUddJfiuR.6w28JdYoZYzaalfab1xGPMbrNRB 0XCrD.zzqrxoOpuEsYGM8QClbyIfwCLjUytg7JidYyLC5fzpjrmYMzYB5mEU KYa1fnbuL_tlFpiWI0yLhd9CJM4D4Y98cXjO.6ibX7cnFKWW0Gr3JY8iCPxu Kd72_reJBrgrNKoFCwZLieT6ZXrfHrFQoTj4_wogn5l_d_HmVIKBYVtQSjcy 8BtH_mkv_DE1BzN412OaRzCCKQPxgsggSTAteBzAl3ezNuIcPVnY2_SeEuQa zPbIgauU6ZgpIiHzEJo.puhztXMdBm5rzrnC6vlETQzNyUHOf0cWUWenzEKL TmrtgJFkPlvvvTXX4irNQZjUdNKAnRqoFZgqbKQwbkG17WVXIGgo- Received: from [99.140.63.246] by web160404.mail.bf1.yahoo.com via HTTP; Tue, 17 Apr 2012 22:27:23 PDT X-Mailer: YahooMailWebService/0.8.117.340979 References: X-Original-Message-ID: <1334726843.41807.YahooMailNeo@web160404.mail.bf1.yahoo.com> X-Original-Date: Tue, 17 Apr 2012 22:27:23 -0700 (PDT) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: Fw: L320 flap setting X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="630850330-2117187783-1334726843=:41807" --630850330-2117187783-1334726843=:41807 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Scott,=0AI am dissapointed.=A0 :-)=0AGoogle can fill=A0in the details on=A0= Reynolds number.=0AIt just relates kinematic viscosity, chord length and ve= locity.=0ALow Speed is relative. Mach and Reynolds number were right in our= range.=0AM 0.3=A0=3D ~200 kts=0A=A0=0AChris Zavatson=0AN91CZ=0A360std=0Aww= w.N91CZ.net=0A=0AFrom: "Sky2high@aol.com" =0ATo: lml@lanc= aironline.net =0ASent: Tuesday, April 17, 2012 1:54 PM=0ASubject: [LML] Re:= Fw: L320 flap setting=0A=0A=0AChris,=0A=0AAhh, too bad I can't translate R= eynolds numbers into KIAS.=A0 I thought the NASA airfoil tests were at slow= speeds????=0A=0AOh well .. It does match my experience.=A0 At high speeds,= flap in reflex and nose down trim (on my airplane, small tail, actual TE o= f elevator is down a bit=A0from neutral) is a very interesting condition=A0= to contemplate.=A0 After all, the elevator is an upside down wing (slightly= cambered on the bottom).=A0 Thus, nose down trim is actually with the=A0el= evator in reflex.=A0 Since the chord of the horizontal stab was positioned = with a negative incidence to the longeron=A0(-.5 to -1 degrees, mine is -.8= ) and at cruise (about 180 - 190=A0KIAS), the longeron=A0has been measured= =A0to be at=A00 degrees (hmmm, just like the plane was=A0designed), the hor= izontal may be at a=A0positive AOA (relative air flow?, think upside down) = until one considers the position of the elevator and its trim=A0change on t= he AOA to a lesser AOA.=A0 Thus, less lift (anti lift), less drag.=0A=0AEga= ds, now my head=A0hurts.=0A=0ABlue Skies,=0A=0AScott Krueger=A0=0A=0AIn a m= essage dated 4/17/2012 8:53:25 A.M. Central Daylight Time, chris_zavatson@y= ahoo.com writes:=0AI use the attached charts to describe the impact of refl= ex:=A0 Repositioning the drag bucket, a drop of a few drag counts and a hug= e 3 to 1 change in pitching moment.=0A>=0A>Chris Zavatson=0A>N91CZ=0A>360st= d=0A>www.N91CZ.net=0A>=0A>--=0A>For archives and unsub http://mail.lancairo= nline.net:81/lists/lml/List.html=0A> --630850330-2117187783-1334726843=:41807 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Scott,
I am dissapointed.&n= bsp; :-)
Google can fill in the details on Reynolds number.
It just relates kine= matic viscosity, chord length and velocity.
Low Speed is relativ= e. Mach and Reynolds number were right in our range.
M 0.3 =3D ~200 = kts
 
Chris Zavatson
N91CZ
360std

From:= "Sky2high@aol.com" <Sky2high@aol.com>
To: lml@lancaironline.net
Sent: Tuesday, April 17, 2012 1:54 PM<= BR>Subject: [LML] Re: Fw: L= 320 flap setting

Chris,
 
Ahh, too bad I can't translate Reynolds numbers into KIAS.  I tho= ught the NASA airfoil tests were at slow speeds????
 
Oh well .. It does match my experience.  At high speeds, flap in = reflex and nose down trim (on my airplane, small tail, actual TE of elevato= r is down a bit from neutral) is a very interesting condition to = contemplate.  After all, the elevator is an upside down wing (slightly= cambered on the bottom).  Thus, nose down trim is actually with the&n= bsp;elevator in reflex.  Since the chord of the horizontal stab was po= sitioned with a negative incidence to the longeron (-.5 to -1 degrees,= mine is -.8) and at cruise (about 180 - 190 KIAS), the longeron = has been measured to be at 0 degrees (hmmm, just like the plane w= as designed), the horizontal may be at a positive AOA (relative a= ir flow?, think upside down) until one considers the position of the elevat= or and its trim change on the AOA to a lesser AOA.  Thus, less li= ft (anti lift), less drag.
 
Egads, now my head hurts.
 
Blue Skies,
 
Scott Krueger 
 
In a message dated 4/17/2012 8:53:25 A.M. Central Daylight Time, chris= _zavatson@yahoo.com writes:
I use the attached charts to describe the impact of reflex:  Repositioning the drag bucket, a dro= p of a few drag counts and a huge 3 to 1 change in pitching moment.
 
Chris Zavatson
N91CZ
360std


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