Single blade aero rotor - and perfectly balanced too

When the wind blows and you follow one of these silver maple seeds [1] as it smoothly spins down to the ground - it might make you wonder why there are not any single bladed wind turbines in commercial production.   Since it's Mother's Day, surely we should look to Mother Nature for a little guidance and suggestion as to how to capture wind energy with the simplest and most efficient rotor design ....

I have collected a bucket of these with the intention of setting (at night) a bright light shining up from the ground, and videoing the dumped bucket of seeds as they spin down to the camera.