Another video of a Zodiac HDS's wing in flight with tufts on the wing, showing slow flight aerodynamics.
This one is more detailed than the other video I posted.
Video has cues on screen showing the indicated airspeed as called out by the pilot.
Edited to show takeoff, climb, three sets of gradual speed reductions to the edge of a stall, and the landing. There's a stall break in the second slow flight segment. You can hear the oil canning near the stall.
Low quality old video cam in 2008
Photos and details of tuft testing and adding vortex generators:
sites.google.com/site/601cgzd...