Ferris wheel

Ferris wheel, amusement park ride. It consists of a power-operated wheel that is about 50 ft (15 m) in diameter. It has two rims that are parallel to and equidistant from the shaft about which the wheel rotates. Between the rims there are a number of seats that carry passengers. George W. G. Ferris, a U.S. engineer from Galesburg, Ill., designed and built the first such wheel for the World's Columbian Exposition held in Chicago in 1892. This wheel was 250 ft (76 m) in diameter and carried 36 cars with a seating capacity of 40 passengers each; its total weight was 220 tons. The world's largest Ferris wheel is that in London (1999), measuring 443 ft (135 m). A Ferris wheel in Yokohama, Japan, is 344 ft (105 m) high; the largest in the United States is the Texas Star in Dallas, at 212 ft (65 m). Ferris wheels may be found at many exhibitions, fairs, and carnivals.