PIRA Classification: 1K20.45
Description: A long rod sits on top of two wheel that are connected in such a way as to always rotate in opposite directions. When the rod is centered and the wheels spun toward each other, the rod will not move. If the rod is then moved off center, it will oscillate. If the wheels are then rotated the opposite direction, the rod will fall off.
Special Instructions: None
Condition: OK
Setup time: 1 minute
Safety Issues: None