May 7-10, 2007
The wind car from the blue LEGO Education set surprisingly goes toward the fan.
The project is built in two parts from instructions A and B.
Which side the crown gear goes on is important.
When the car is set facing away from the fan it moves to a point of equilibrium
of the force from the air and the friction of the slipping wheels against the floor.
Different wheels give a different equilibrium point.
Try making the car from other sets and different sails.
Old fashion pin wheel of stiff paper works great.
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