Objective : visualize flow separation in the root of LS6 glider.

Result : flow in wing fuselage junction is sensitive to aoa & aileron:flap deflection.

In stall :
Separation occurs at lower fuselage attitude when flap increase. Tip : visualize this by looking at tail position vs horizon when separation appears.

In normal flight :
Transition : separation is not visible. Very slight tuft activity on the fuselage sides.
Circling : Seperation occurs quite often, particularly on the wing inside turn. This is likely driven by the additionnal aerodynamic load brought by aileron offset ut of the turn to keep bank angle.

Next time :
Tufts should be applied on both sides
It could be interesting to pull some G's to see what happens

A video with some technical content in it...

sailplane-matscherrer.blogspot.fr/
(2012)

Music :
"The Car Chase" by Lee Rosevere
(members.shaw.ca/happypuppyrecords/index.html)

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