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vortex generators

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jmacdonald(at)lethbridge.
Guest

Posted: Tue Oct 03, 2006 1:29 pm Post subject: vortex generators

Has anyone put vortex generators on you Zenair and how did it work  

      [quote][b]

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leogates(at)allvantage.co
Guest

Posted: Thu Oct 05, 2006 9:13 am Post subject: vortex generators

James,

  

 Check the Matronics Archives: http://www.matronics.com/archives/

  

 You will find over 70 messages on this subject.

  

 Here is one I posted:

  

 List,

  

 I read Michael Mossman's article, Stall Reduction in the 601 HDS, in 

Zenair News, issue #153, March/April 2006, with interest.  I noted he 

Had no before and after comparison figures, as he put on Vortex 

Generators (VGs) prior to flying his plane. He also gave no TAS figures, 

Only IAS.

  

 N601Z is unpainted so I figured she was an excellent candidate for some 

Experimentation.  N601Z, without VGs, flies  much as Michael described 

The flight performance of his plane, with VGs.

  

 I washed N601Z and re-test flew her to verify lift-off, climb, cruise, 

Low speed handling and stall.  I made VGS from .025, as per Michael's 

Article and glued them on.

  

 Flight test report:

    Lift-off - no change

    Climb - no change

    Cruise - no change

    Low speed handling - no change

    Stall speed - no change 

  

 I sent the following to Zenith:  "I need an informed suggestion E Do I 

Start moving the VGs back and forward to see if I get any positive 

Results or is this a waste of time?"

  

 Nicolas Hines replied: "I have forwarded you e-mail to Chris..."

  

 When I get a reply I will post it here.

  

 Leo Gates

N601Z CH601HDS TDO

  

 [i]----

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grs-pms(at)comcast.net
Guest

Posted: Thu Oct 05, 2006 11:14 am Post subject: vortex generators

Leo:

  

 What was the chordwise location of your VGs.  Some old  work I ran across at Boeing suggests that they should be at about  5%c.

  

 George

 [quote]   ---

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ggower_99(at)yahoo.com
Guest

Posted: Thu Oct 05, 2006 5:28 pm Post subject: vortex generators

Will make the 701 a helicopter    



The XL has a great airfoil... I dont think will make much noticeable diference, maybe only when washing the wings,,,    Pretty scars in the hands...  



James MacDonald <jmacdonald(at)lethbridge.ca> wrote: 	  Quote: 	
		                Has anyone put vortex generators on you Zenair and how did it work

  

      	


  [quote][b]

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challgren(at)mac.com
Guest

Posted: Fri Oct 06, 2006 7:23 am Post subject: Vortex Generators

List:

"Has anyone put vortex generators on you Zenair and how did it work"



We put the Land Shorter VG's on our 601 HDS and it reduced the stall speed from 51 mph to 46 but more importantly the handling characteristics during and after landing were vastly improved.  The latter was aided greatly when we installed them on the lower side of the horizontal stabilizer.  We were able to aerodynamically brake down to about 20 mph.



All of the numbers should be in the archives as I reported all numbers as they were gathered.



Stan

 [quote][b]

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daveaustin2(at)can.rogers
Guest

Posted: Fri Oct 06, 2006 8:17 am Post subject: Vortex Generators

Quoting Stanley Challgren <challgren(at)mac.com>:



 	  Quote: 	
		   List:



 "Has anyone put vortex generators on you Zenair and how did it work"



 We put the Land Shorter VG's on our 601 HDS and it reduced the stall

 speed from 51 mph to 46 but more importantly the handling

 characteristics during and after landing were vastly improved.  The

 latter was aided greatly when we installed them on the lower side of

 the horizontal stabilizer.  We were able to aerodynamically brake

 down to about 20 mph.



 All of the numbers should be in the archives as I reported all

 numbers as they were gathered.



 Stan

Stan,
	


Can you tell me exactly where you put them on the wings and hor. stab. please. 

Also how many and the dimensions of them.  How did you fix them on?

Many thanks.

Please send reply to my e-mail address as as well as I am currently having mail

problems with Zenith-list.   Daveaustin2(at)sympatico.ca

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