X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 19 Jul 2010 08:59:39 -0400 Message-ID: X-Original-Return-Path: Received: from web36907.mail.mud.yahoo.com ([209.191.85.75] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with SMTP id 4398096 for lml@lancaironline.net; Mon, 19 Jul 2010 08:01:02 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.85.75; envelope-from=chris_zavatson@yahoo.com Received: (qmail 99321 invoked by uid 60001); 19 Jul 2010 12:00:26 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=UrouHg90grdeyKCFlnsNhkOvbrp1+8hJL1dvdfn+5Xf0SbfsgNQ7kz/HL+sealD01XA6NnQfbcS7pslmZG6+SuekdNpjkeI+H8ASbpsrxHgIpB1d5JHKvow/QFQ0oskfBtygugZA9SDF+bc+uSjwoFJkfYt99spQwpi4Hk6EhUc=; X-Original-Message-ID: <163469.83296.qm@web36907.mail.mud.yahoo.com> X-YMail-OSG: lvc4Xf0VM1nZnoQUKwHRbG5OeQY3zJQo.i1jL6j8i.iig29 uYN9wwfdzaoLtIyE8PKiQlWVTN3mOl98CLPXaQxjkikgAd0lGTahWqPRODnm 3I8txEzbYuTfc_A.rksRmEvw4TrHvZ05NRq87ZdLkxiR_T8KPTFxxlfuHgVn JHzE8z60l25E0AfPJlpeA8JkVmF1Jb9Rkpqq3sf2iLcLEppB5bQlUX7eCjnB OHKqSmPBJ9Q0170e3.h5GIGc1JH8H3ysrSC2fOPn8nVaFGHRCK7IRLBRQVoL PLBoNDKKd_6tjUWj9xXoDCHDYGloFZse_2pKFEVMTV9RehFAJF63zkM0Z.jV BXqo9jeaYP5Lw2JNDpWC6dQ_0NY8- Received: from [99.140.63.27] by web36907.mail.mud.yahoo.com via HTTP; Mon, 19 Jul 2010 05:00:25 PDT X-Mailer: YahooMailRC/420.4 YahooMailWebService/0.8.104.276605 References: X-Original-Date: Mon, 19 Jul 2010 05:00:25 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] Re: Small tail, MK II tail, CG range X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1097942735-1279540825=:83296" --0-1097942735-1279540825=:83296 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Scott,=0AInteresting find, certainly better than the previous one that did = not take any =0Ahorizontal tail data into account.=0AI must present one cau= tion when using this calculator.=A0 Even if we assume all =0Acalculation ar= e done correctly, this calculator is=A0targeting the radio =0Acontrolled (R= C) community.=A0 The calculator is determining the 'stick-fixed' =0Aneutral= point.=A0=A0This means=A0the elevator is assumed to be rigidly held in pla= ce =0Avia electric servo or some other actuator.=A0=A0When this is true, th= e=A0entire =0Ahorizontal stabilizer area=A0can=A0be=A0used in stability cal= culations.=A0 In our =0Aplanes, the elevator is free to float=A0so the=A0ef= fectiveness of the stabilizer =0Ais=A0reduced.=A0=A0When the=A0free elevato= r is=A0added into the=A0calculations,=A0you end up =0Awith the 'stick-free'= neutral point.=A0 =A0I=A0mention=A0this=A0only because the simpler =0A'sti= ck-fixed'=A0calculation produces an overly optimistic=A0result for our =0Aa= pplication that might get someone in trouble.=0A=0AChris=A0Zavatson=0AN91CZ= =0A360std.=0Awww.N91CZ.com=0A=0A=0A=0A=0A________________________________= =0AFrom: "Sky2high@aol.com" =0ATo: lml@lancaironline.net= =0ASent: Sun, July 18, 2010 5:35:49 AM=0ASubject: [LML] Re: Small tail, MK = II tail, CG range=0A=0AHere is another calculator I found: http://adamone.r= chomepage.com/cg2_calc.htm=0A=0AIt includes tail data.=A0 Drat, I did not g= et those tail=A0measurements this time =0Aaround.=A0 But I will next time..= ...............=0A=0AScott Krueger=0A=0A=0A --0-1097942735-1279540825=:83296 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Scott,
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=0A
Interesting find, certainly = better than the previous one that did not take any horizontal tail data int= o account.
=0A
I must present one caution when using this calculat= or.  Even if we assume all calculation are done correctly, this calcul= ator is targeting the radio controlled (RC) community.  The calcu= lator is determining the 'stick-fixed' neutral point.  This means=  the elevator is assumed to be rigidly held in place via electric serv= o or some other actuator.  When this is true, the entire hor= izontal stabilizer area can be used in stability calculation= s.  In our planes, the elevator is free to float so the effe= ctiveness of the stabilizer is reduced.  When the free = elevator is added into the calculations, you end up with the= 'stick-free' neutral point.   I mention this only= because the simpler 'stick-fixed' calculation produces an overly opti= mistic result for our application that might get someone in trouble.=0A
 
=0A
Chris Zavatson
=0A
N91CZ=0A
360std.
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=0AFrom: "Sky2high@aol.com" <Sky2high@aol.com>
To: lml@lancaironline.net
Sent: Sun, July 18, 2010 5:35:49 AM=
Subject: [LML] Re: Smal= l tail, MK II tail, CG range

=0A
Here is another calculator I found: = http://adamone.rchomepage.com/cg2_calc.htm
=0A
 
=0AIt includes tail data.  Drat, I did not get those tail measureme= nts this time around.  But I will next time.................
=0A<= DIV> 
=0A
Scott Krueger
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=0A
&nbs= p;


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