<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> The Rotor is an amusement park ride, designed by German engineer Ernst Hoffmeister in the late 1940s . The ride 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 numerous amusement parks, although travelling variants have been surpassed by the Gravitron . </P> <P> The Rotor is a large, upright barrel, rotated at 33 revolutions per minute . The rotation of the barrel creates a centrifugal effect 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 . </P> <P> 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 . </P>

Fairground ride where you stick to the wall