X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Tue, 14 Nov 2006 12:44:09 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m27.mx.aol.com ([64.12.137.8] verified) by logan.com (CommuniGate Pro SMTP 5.1.2) with ESMTP id 1564629 for lml@lancaironline.net; Tue, 14 Nov 2006 10:42:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.8; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m27.mx.aol.com (mail_out_v38_r7.6.) id q.c27.963e461 (42807) for ; Tue, 14 Nov 2006 10:41:48 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Tue, 14 Nov 2006 10:41:48 EST Subject: Re: [LML] Re: Control Surfaces X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1163518908" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1163518908 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 11/14/2006 8:59:52 A.M. Central Standard Time, kevin@airforcemechanical.com writes: I have started my control surfaces bodywork, On the control surfaces, do you build up their level with the surface leading it, or to the level where it meets/pivots. For instance, I am starting on the Horizontal Stabilizers and Elevators. Where the Elevator, meets the Horizontal Stabilizer and pivots into Horizontal Stabilizer; Should they be the same level. Meaning building up the Elevator with Micro, or should the Elevator be at the level that they meet... About 3/16" lower. On one hand it seams aerodynamically the build up and leveling will not create as much air flow disturbance, but at the same time adding all that Micro would be extra weight? Kevin, Any time the airflow sees a step down there is turbulence, loss of attachment, an increase in drag and, perhaps, some loss of control surface authority. In the small operating range about cruise speed, the control surface should be at least at the same level as the attached flying surface or even a bit larger as the air can follow a minor curved elevation (no pun here) in the surface over which it is flowing. Too bad that fast build parts sometimes don't meet one's requirements. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) A man has got to know his limitations. -------------------------------1163518908 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 11/14/2006 8:59:52 A.M. Central Standard Time,=20 kevin@airforcemechanical.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I have=20 started my control surfaces bodywork, On the control surfaces, 
d= o=20 you build up their level with the surface leading it, or to the =20
level where it meets/pivots.

For instance, I am starting on the= =20 Horizontal Stabilizers and 
Elevators. Where the Elevator, meets=20= the=20 Horizontal Stabilizer and 
pivots into Horizontal Stabilizer; Sho= uld=20 they be the same level. 
Meaning building up the Elevator with Mi= cro,=20 or should the Elevator 
be at the level that they meet... About 3= /16"=20 lower.

On one hand it seams aerodynamically the build up and leveli= ng=20 will 
not create as much air flow disturbance, but at the same ti= me=20 adding 
all that Micro would be extra=20 weight?
Kevin,
 
Any time the airflow sees a step down there is turbulence, loss of=20 attachment, an increase in drag and, perhaps, some loss of control surface=20 authority.  In the small operating range about cruise speed,=20= the=20 control surface should be at least at the same level as the attached flying=20 surface or even a bit larger as the air can follow a minor curved eleva= tion=20 (no pun here) in the surface over which it is flowing.
 
Too bad that fast build parts sometimes don't meet one's requirements.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

A m= an=20 has got to know his limitations.
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