Tumble Bug

A Tumble Bug is an amusement park ride with a circular track.

The ride has a central axis and a circular track. The track has changes in elevation in it, and the cars, each attached by a rod to a central pivot attachment point and connected together, are propelled around the track via motors between the cars. Power is carried to the motors via slip ring brushes at the center and cables. Each car body is free to rotate around an axis perpendicular to the track (vertical if the track height is the same as the central pivot attachment point) so the riders experience motion that is rotational as well as vertical. The ride travels in both directions around the track.