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A linear induction motor (LIM) is a form of electro-magnetic propulsion containing no moving parts. This system may replace a traditional lift hill and brakes. Typically LIM systems launch the roller coaster train from the station extremely quickly. They have since been superseded by linear synchronous motor (LSM) technology.
The first use of linear induction motors for launching a train was in 1996 with the opening of Flight of Fear at Kings Island and its clone at Kings Dominion. Unlike prior launched roller coasters, which used a weight drop launch, flywheel launch or electric winch launch, LIM technology requires no mechanical contact between the track and the train, reducing wear and tear.
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