X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 08 Oct 2008 18:46:39 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d04.mx.aol.com ([205.188.157.36] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3202505 for lml@lancaironline.net; Tue, 07 Oct 2008 00:45:51 -0400 Received: from Sky2high@aol.com by imo-d04.mx.aol.com (mail_out_v39.1.) id q.c3b.46d00739 (14502) for ; Tue, 7 Oct 2008 00:45:50 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Tue, 7 Oct 2008 00:45:49 EDT Subject: Re: [LML] Small Tail Incidence Data X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1223354749" X-Mailer: Unknown sub 34 X-Spam-Flag:NO -------------------------------1223354749 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en Jim, =20 For comparison, what is your empty weight CG location and do you have full=20 elevator authority at full flaps? =20 Also, remember that the horizontal stab is providing negative lift (flying =20 upside down). So, in level cruise flight, your H. stab has less angle of=20 attack than mine. It would be interesting to know the stick force necessar= y to=20 keep the nose from rising at say 175 KIAS when the elevator is trimmed to t= he=20 neutral position. Ah, never mind as there would be differences with=20 different trim systems, elevator bell crank length, etc.=20 =20 Scott =20 =20 In a message dated 10/6/2008 9:29:24 P.M. Central Daylight Time, =20 panelmaker@earthlink.net writes: =20 Scott, I didn=E2=80=99t think that would work (having the elevator on) unti= l I did=20 the same measurements and calculation. I first did mine without the elevato= r=20 attached, dividing the cord thickness in half then measuring the waterline=20= to=20 leading edge. I got -.82=C2=BA to -.95=C2=BA depending on how well you can=20= interpret=20 the meniscus. So I measured with the elevator on and got -.59=C2=BA to -.6= 7=C2=BA. Close=20 enough.=20 I guess this means that my elevator has a slight downward deflection from=20 the fixed portion.=20 My dimensions were 21.25 at 12 inches in from the counter balance cut. The=20 waterline difference was .25 inch to .22 inches depending on how well you r= ead=20 the meniscus.=20 I=E2=80=99m glad I did this re-measurement as the longer I thought about it= the more=20 convinced I was I did it wrong when I set the HS.=20 Jim=20 =20 =20 ____________________________________ =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of=20 Sky2high@aol.com Sent: Monday, October 06, 2008 8:35 AM To: lml@lancaironline.net Subject: [LML] Small Tail Incidence Data =20 Here are the results:=20 =20 **************New MapQuest Local shows what's happening at your destination.= =20 Dining, Movies, Events, News & more. Try it out! =20 (http://local.mapquest.com/?ncid=3Demlcntnew00000001) -------------------------------1223354749 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en

Jim,

For comparison, what is your empty weight CG location and do you h= ave=20 full elevator authority at full flaps?

Also, remember that the horizontal stab is providing negative lift (fly= ing=20 upside down). So, in level cruise flight, your H. stab has less a= ngle=20 of attack than mine. It would be interesting to know the stick force=20 necessary to keep the nose from rising at say 175 KIAS when the elevator is=20 trimmed to the neutral position. Ah, never mind as there would be=20 differences with different trim systems, elevator bell crank length,=20 etc.

Scott

In a message dated 10/6/2008 9:29:24 P.M. Central Daylight Time,=20 panelmaker@earthlink.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Scott, I didn=E2= =80=99t think=20 that would work (having the elevator on) until I did the same measurements= and=20 calculation. I first did mine without the elevator attached, dividing the=20= cord=20 thickness in half then measuring the waterline to leading edge. I got -.82= =C2=BA to=20 -.95=C2=BA depending on how well you can interpret the meniscus. So I meas= ured with=20 the elevator on and got -.59=C2=BA to -.67=C2=BA. Close enough.

= ;

I guess this means= that=20 my elevator has a slight downward deflection from the fixed=20 portion.

My dimensions were= 21.25=20 at 12 inches in from the counter balance cut. The waterline difference was= .25=20 inch to .22 inches depending on how well you read the=20 meniscus.

I=E2=80=99m glad I= did this=20 re-measurement as the longer I thought about it the more convinced I was I= did=20 it wrong when I set the HS.

Jim<= /P>

&nbs= p;

From:On Behalf Of Sky2high@aol.com
Sent: Monday, October 06, 2008 8:35= =20 AM
To:=20 lml@lancaironline.net
Subject: [LML] Small Tail Incidence= =20 Data

Here are= the=20 results:

=

New MapQuest Local shows what's happening at your de= stination. Dining, Movies, Events, News & more. Try it out!

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