Eejanaika - 4th Dimension roller coaster
Eejanaika (ええじゃないか) is a steel 4th Dimension roller coaster at Fuji-Q Highland in Fujiyoshida, Yamanashi, Japan.
Eejanaika is a "4th Dimension" coaster, a design in which the seats can rotate forward or backward 360 degrees in a controlled spin. This is achieved by having four rails on the track: two of these are running rails while the other two are for spin control. The 2 rails that control the spin of the seats move up and down relative to the track and spin the seats using a rack and pinion gear mechanism.
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