One of the most traditional rides with a long history
consists of a ride center with an arm which can be elevated and lowered by using a hydraulic cylinder. Attached to the main arm there is a round structure made up of spokes. At the extreme of each pair of spokes a car is suspended into which 2 passengers are seated, one behind the other.
The ride start speeding up the horizontal rotations thus pushing the cars outside due to the centrifugal force. Then all of sudden the main arm starts elevation bringing up all of the cars in an upright vertical position while the Wheel keeps on rotating. At this point the passengers go upside down when making circles in the cars. In the end the main arm lowers again till the cars are horizontally again and the ride speeds down.