X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 Mar 2011 23:03:17 -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 5.4c2) with SMTP id 4926246 for lml@lancaironline.net; Tue, 29 Mar 2011 15:01:34 -0400 Received-SPF: none receiver=logan.com; client-ip=209.191.85.75; envelope-from=chris_zavatson@yahoo.com Received: (qmail 89044 invoked by uid 60001); 29 Mar 2011 19:00:57 -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=hEUqZRYX80wNCeo76g5AqSpT+IPPkq+w6dXZZi2minAwHsjqQ+GcZmdqixUXX/haUI4hm/xMlDTD/zN9VilaWQdQAHiG/eaZYiAep+roJU0HUPDOycRQQelabY1D7jSHsRa/k/cG8/bRfeYeKmJ2J4GW2iDgYriA8dzheGdzr6Y=; X-Original-Message-ID: <760295.67775.qm@web36907.mail.mud.yahoo.com> X-YMail-OSG: KxBskZwVM1kL9GAOrv7Ahl8yNs7BxJQVeVybU3g40fISEVR sjr2AsybdB393CBGp9A9Qq7eyuy.Q8NYUGhQ.mVAowEW7C9z7Ml2ENSpdU6f _.nVMd82nEPHINoqi.1yJxVo7RygzhRHYed2Ua7MkgIZOry6DaLkRTrj8u2X MtFPYFawfMFA_ORMT6oGidURlOST8pN3nUj03ckp_yW0_PrqIzqVlIgsHGwm F3wUTzoahWNgmpGNhSwUy2SQ9Q4IsN5tjo1.j9YvkYv1ZT.oOPLzC5VZsOJl 8RTlvyAL9xDWRXg2TFApLBoC1GSWpBNkY42cGe4E6FbLKUMbJBIU5g4dtVsN fjqkuL8XHTC6M7uEb2iKV7K.WHOfVGBDBJSQJ.GooGrnmpz93cawl4SqIKee mtGs84hDAM2myZg-- Received: from [12.130.164.194] by web36907.mail.mud.yahoo.com via HTTP; Tue, 29 Mar 2011 12:00:57 PDT X-Mailer: YahooMailRC/559 YahooMailWebService/0.8.109.295617 References: X-Original-Date: Tue, 29 Mar 2011 12:00:57 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] Re: Finishing Elevator Question X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-283440147-1301425257=:67775" --0-283440147-1301425257=:67775 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Angier,=0ABenefits of concave:=0A1. Potentail for more pressure recovery = =3D less drag=0A2. Airflow on the upper and lower surfaces at the trailing = edge is closer to =0Aparallel when they meet =3D less drag=0ADrawbacks of c= oncave:=0A1. Easier to get flow separation=A0=3D more drag (similar to sepa= ration bubble that =0Acan form=A0on the=A0the lower concave surface of lami= nar airfoil sections)=0A2. Earlier seperation with control surface deflecti= on =3D more drag=A0(generally =0Aonly a concern=A0if it occurs due to trimm= ing in a cruise condition)=0A=0AIn=A0the big picture, ensuring the flow rem= ains attached transitioning from the =0Astabilizer to the control surface i= s much more critical.=0A=0AFWIW, I have the MKII tail.=A0 My surfaces were = nearly flat after assembly, =0Aperhaps off by ~1 mm.=A0 I finished them fla= t=A0with micro.=A0 =0A=0A=0AChris Zavatson=0AN91CZ=0A360std=0Awww.N91CZ.net= =0A=0A=0A=0A=0A________________________________=0AFrom: "Greenbacks, UnLtd.= " =0ATo: lml@lancaironline.net=0ASent: Tue, March 29, 201= 1 7:14:58 AM=0ASubject: [LML] Re: Finishing Elevator Question=0A=0AAccordin= g to Stan, the Legacy manual specifies a concave shape for the elevator =0A= surface. The 320/360 calls for straight.=0AFor those of us who may be aerod= ynamically challenged, what is the benefit of =0Aone shape vs the other? Ar= e all the Legacy control surfaces concave? What about =0Athe IV and Evoluti= on?=0A=0AAngier Ames=0AN4ZQ=0A=0Aps..had to perform a much needed upgrade t= o my cockpit yesterday, an accessory =0Apower source for my iPad!=0A--=0AFo= r archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html= =0A=0A=0A=0A --0-283440147-1301425257=:67775 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Angier,
=0A
Benefits of concave:
=0A
1. Potenta= il for more pressure recovery =3D less drag
=0A
2. Airflow on the = upper and lower surfaces at the trailing edge is closer to parallel when th= ey meet =3D less drag
=0A
Drawbacks of concave:
=0A
1. Ea= sier to get flow separation =3D more drag (similar to separation bubbl= e that can form on the the lower concave surface of laminar airfo= il sections)
=0A
2. Earlier seperation with control surface deflec= tion =3D more drag (generally only a concern if it occurs due to = trimming in a cruise condition)
=0A
 
=0A
In th= e big picture, ensuring the flow remains attached transitioning from the st= abilizer to the control surface is much more critical.
= =0A
 
=0A
FWIW, I have the MKII tail.  My surfaces w= ere nearly flat after assembly, perhaps off by ~1 mm.  I finished them= flat with micro. 
=0A
 
=0A
Chris Zavats= on
=0A
N91CZ
=0A
360std
=0A=0A

=0A
=0A
=0AFrom:= "Greenbacks, UnLtd." <N4ZQ@VERIZON.NET>
To: lml@lancaironline.net
Sent: Tue, March 29, 2011 7:14:58 AM
Subject: [LML] Re: Finishing Elevator= Question

According to Stan, the Legacy manual specifies a co= ncave shape for the elevator surface. The 320/360 calls for straight.
Fo= r those of us who may be aerodynamically challenged, what is the benefit of= one shape vs the other? Are all the Legacy control surfaces concave? What = about the IV and Evolution?

Angier Ames
N4ZQ

ps..had to pe= rform a much needed upgrade to my cockpit yesterday, an accessory power sou= rce for my iPad!
--
For archives and unsub http://mail.lancaironline.= net:81/lists/lml/List.html

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