"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.

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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