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Position of trailing edge - Flaps/Aileron

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Martin Pohl

Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland

Posted: Sat Apr 26, 2008 1:58 am Post subject: Position of trailing edge - Flaps/Aileron

Hi Don & George



Just for confirmation: The LEADING upper edge of the flaps is approx. 3-4 mm (0,15 inch) higher than the trailing upper edge of the wing (at the rear spar, piano hinge is a the bottom of the wing).



The TRAILING edge of the flaps should be at the same position as that of the ailerons. If the flap's trailing edge is positioned higher than that of the ailerons, a stall could develop first at the wing tip rather than at the wing root, leading to uncontrolled quick movements of the plane around the longitudinal axis.



Could please somebody confirm (or disprove) my thoughts.



Cheers Martin

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_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html

planecrazydld(at)yahoo.co
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Posted: Sat Apr 26, 2008 3:19 am Post subject: Position of trailing edge - Flaps/Aileron

I agree. I was going to post a reply but got buried and forgot.



Martin Pohl <mpohl(at)pohltec.ch> wrote:[quote] --> Zenith-List message posted by: "Martin Pohl" 



Hi Don & George



Just for confirmation: The LEADING upper edge of the flaps is approx. 3-4 mm (0,15 inch) higher than the trailing upper edge of the wing (at the rear spar, piano hinge is a the bottom of the wing).



The TRAILING edge of the flaps should be at the same position as that of the ailerons. If the flap's trailing edge is positioned higher than that of the ailerons, a stall could develop first at the wing tip rather than at the wing root, leading to uncontrolled quick movements of the plane around the longitudinal axis.



Could please somebody confirm (or disprove) my thoughts.



Cheers Martin



--------

Martin          Be a better friend, newshound, and  [quote][b]

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gfmjr_20(at)HOTMAIL.COM
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Posted: Sat Apr 26, 2008 9:23 am Post subject: Position of trailing edge - Flaps/Aileron

Martin--

   Page 6-W-00 (edition 12/01)  indicates that the flap extends 3mm above the rear wing spar and 2-3mm below the bottom of the wing.

  

 George

  

 George



 	  Quote: 	
		   Subject: Position of trailing edge - Flaps/Aileron

 From: mpohl(at)pohltec.ch

 Date: Sat, 26 Apr 2008 02:58:03 -0700

 To: zenith-list(at)matronics.com

 

 --> Zenith-List message posted by: "Martin Pohl" <mpohl(at)pohltec.ch>

 

 Hi Don & George

 

 Just for confirmation: The LEADING upper edge of the flaps is approx. 3-4 mm (0,15 inch) higher than the trailing upper edge of the wing (at the rear spar, piano hinge is a the bottom of the wing).

 

 The TRAILING edge of the flaps should be at the same position as that of the ailerons. If the flap's trailing edge is positioned higher than that of the ailerons, a stall could develop first at the wing tip rather than at the wing root, leading to uncontrolled quick movements of the plane around the longitudinal axis.

 

 Could please somebody confirm (or disprove) my thoughts.

 

 Cheers Martin

 

 --------

 Martin Pohl

 Zodiac XL QBK

 8645 Jona, Switzerland

 www.pohltec.ch/ZodiacXL

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=179302#179302

 ============

 

 

 


	


Spell a grand slam in this game where word skill meets World Series. Get in the game.  [quote][b]

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psm(at)ATT.NET
Guest

Posted: Sun Apr 27, 2008 12:14 pm Post subject: Position of trailing edge - Flaps/Aileron

At 02:58 AM 4/26/2008, you wrote:

 	  Quote: 	
		  Could please somebody confirm (or disprove) my thoughts.


	


One thing to consider is the twist built into the ailerons.  This 

creates a washout which is intended to prevent the tips stalling first.



Paul

XL fuselage

do not archive

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