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Turbulators



 
 
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  #1  
Old August 5th 05, 07:11 PM
David Gould
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Default Turbulators

Hi Guys,would anybody have a copy of an article written
by,I think,Dick Johnson in soaring in the USA sometime
in the eighties about the fitting of turbulator tape
to an Astir CS 77.



  #2  
Old August 5th 05, 08:57 PM
Derrick Steed
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Would that be the one about where to fit it on the trailer?

Rgds,

Derrick Steed




  #3  
Old August 5th 05, 10:05 PM
Eric Greenwell
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David Gould wrote:
Hi Guys,would anybody have a copy of an article written
by,I think,Dick Johnson in soaring in the USA sometime
in the eighties about the fitting of turbulator tape
to an Astir CS 77.


Try searching the on-line index at

http://soaring.aerobatics.ws/Soaring_Index/

It doesn't have the article, but at least people will know what issue
you need. If that's the Speed Astir, I do remember the tape goes on the
top surface.

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Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA
  #4  
Old August 5th 05, 11:11 PM
Udo Rumpf
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"Eric Greenwell" wrote in message
...
David Gould wrote:
Hi Guys,would anybody have a copy of an article written
by,I think,Dick Johnson in soaring in the USA sometime
in the eighties about the fitting of turbulator tape
to an Astir CS 77.


Try searching the on-line index at

http://soaring.aerobatics.ws/Soaring_Index/

It doesn't have the article, but at least people will know what issue you
need. If that's the Speed Astir, I do remember the tape goes on the top
surface.

--
Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA

Eric,
the CS77 has an E 603 airfoil.
D. Althause did find that a turbulator on the bottom improves the climb
somewhat. I have no info for the turbulator placement as per D. Althause.
I did a quick run on the airfoil and it indicates it should be placed at
63%chord.
Regards
Udo

  #5  
Old August 6th 05, 01:33 AM
toad
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David Gould wrote:
Hi Guys,would anybody have a copy of an article written
by,I think,Dick Johnson in soaring in the USA sometime
in the eighties about the fitting of turbulator tape
to an Astir CS 77.


I have a copy around here somewhere. I got it from Mike Shade at Grob
in Blufton Ohio, his email is

Todd
3S

  #6  
Old August 6th 05, 03:52 AM
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Sorry, I never did get a CS 77 to flight test. I think Mike Shade
should have good info about placing a turbulator on that sailplane.
Dick Johnson

  #7  
Old August 6th 05, 02:03 PM
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I owned an ASTIR CS77 for several years

I can offer you an article from D. Althaus in aerokurier 198? (pdf-file
in German, 200kb, with some pictures.

He says 35% from rear edge for Noppenband.
GROB had written to its customers 63% for Noppenband and 65% for
Zick-Zack from the front. Sorry i lost this letter but i still have the
drawing i made (pdf 8kb) when i placed my turbulator tapes.
Ruediger

 




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