I have a 4-way cross/medal that I was told is the combination of a miraculous medal and the brown scapular.
A Ferris wheel moves from a gravitational force which moves the axle, thus, making the wheel rotate swiftly. 2 people found this useful.
When the wheel is turned, pressure flows to one side and the piston moves. The piston is attached to the steering gears. Hydraulic pressure does the work, and the driver controls the direction by turning the steering wheel. The key to operation is a very sensitive valve system. Both systems use a similar, torsion bar driven valve to direct and relieve pressure in the cylinder.