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Amusement park ride

The Rotor is an amusement ride designed and patented by German engineer Ernst Hoffmeister in 1948. The ride was first demonstrated at Oktoberfest 1949 and still appears in numerous amusement parks. The Rotor is a large, upright barrel, rotated to create an inward acting centripetal force supplied by the wall's support's force. Once at full speed, the floor is retracted, leaving the riders stuck to the wall of the drum.

The Rotor amusement ride was designed and patented by German engineer Ernst Hoffmeister in 1948. It was first demonstrated at Oktoberfest 1949, and was exhibited at fairs and events throughout Europe, during the 1950s and 1960s. The ride still appears in select amusement parks in Europe, although travelling variants have been surpassed by the Gravitron.

The Rotor is a large, upright barrel, rotated at 33 revolutions per minute. The rotation of the barrel creates an inward acting centripetal force supplied by the wall's support's force, equivalent to almost 3 g. Once the barrel has attained full speed, the floor is retracted, leaving the riders stuck to the wall of the drum. At the end of the ride cycle, the drum slows down and gravity takes over. The riders slide down the wall slowly. Most Rotors were constructed with an observation deck. Although Hoffmeister was the designer, most Rotors were constructed under license. In Australia, the Rotors were built by Ted Hopkins of Luna Park Milsons Point. In the United States, two main companies were responsible for production; the Velare Brothers and the Anglo Rotor Corporation. A dispute between these two companies was resolved when the construction rights to touring Rotors were assigned to the Velare Brothers, while permanent standing Rotors (later becoming known as Chance Rotors) became the domain of ARC.

Australia – Three Rotors were built in Australia based on Hoffmeister's design. All had been demolished or destroyed by the 1990s, although a slightly redesigned Rotor was rebuilt for Luna Park Sydney in 1995, which is still in operation. United States – Several Rotors have been constructed in the United States, since the 1960s. There is only one known fixed location Rotor currently in operation in the United States, which is an SDC Model ride. It operates at Canobie Lake Park in Salem, New Hampshire ("Turkish Twist"). A standard Chance model Rotor still stands at Sylvan Beach Amusement Park in Sylvan Beach, New York, but has not operated since the 2018 season. A traveling Chance Rotor travels with Kissel Entertainment, but no longer features the dropping floor.

A scene in The 400 Blows depicts Antoine Doinel (Jean Pierre Léaud) riding a Rotor. Director François Truffaut is among the other riders. The 2006 film Candy's opening scene features actors Abbie Cornish and Heath Ledger riding the Rotor in Sydney's Luna Park, while actor Geoffrey Rush watches them from above. In the 1976 television series Charlie's Angels, the heroines capture a criminal by trapping him into a Rotor ride and turning it on; as such, he became stuck to the wall and couldn't escape. In the season 4 Cleveland Show episode "Spins, Pins, and Fins! ", after breaking into an abandoned amusement park, Cleveland, Lester, Holt, and Tim become trapped while riding the park's Rotor after Lester, who was supposed to be operating the ride, jumps into the ride to join the rest of his friends.