Eccentric wheels differ from conventional Ferris wheels in that some of the passenger cars are not fixed directly to the rim of the wheel, but instead slide on rails between the hub and the rim as the wheel rotates.
Built in 1920 by the Eccentric Ferris Wheel Company, Wonder Wheel has 24 fully enclosed passenger cars, each able to carry 6 people, giving a total capacity of 144 passengers. 16 of the cars slide inward and outward as the wheel rotates, the remainder are fixed to the rim.
The only time the wheel stopped while not under the control of the operator was during the New York City blackout of 1977 on July 13, 1977. Wonder Wheel operates on electricity, however, the passengers were not stuck on the wheel, as the owners cranked the wheel around to get them off.
- Mickey's Fun Wheel (previously Sun Wheel), is a 48.8-metre (160 ft) tall eccentric Ferris wheel at Disney California Adventure Park.
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