LIM/LSM Technology

Tuesday, September 10, 2002 5:39 PM

Does anyone know the difference between LIM and LSM in design? Are Superman: The Escape and Tower of Terror the only LSM coasters?

I appreciate it, thank you.

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105 coasters, and the Cyclone still tops 'em all.

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Tuesday, September 10, 2002 6:05 PM

The trio of Vekoma launched coaster (Superman: The Ride at SF Holland and the 2 RnRC) use LSM, but not in the same manner as Intamin:

A pusher cart hooks the train in the launch stripe. Then, at the right moment, the train is launched. Similar way as Intamin, but instead of having the permanent magnets mounted on the train or car, they are mounted on the cart. RnRC at the Walt Disney Studios (Paris) has been working without a single glitch (coming from ride ops and maintenance).

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Tuesday, September 10, 2002 10:37 PM
California Screamin' at Disney's California Adventure, Superman The Ride at Six Flags Holland, and Rock n RollerCoaster at MGM are also LSM catapulted coasters
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Wednesday, September 11, 2002 4:13 AM
Nope. California Screamin' is LIM.

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Have you ever seen the Demon?
Have you ever heard him scream.............

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Wednesday, September 11, 2002 4:26 AM

LSM's have powerful magnet's mounted on the train that are attracted and repelled by the magnetic fields of the static coils mounted on the track. As the magnetic fields are switched in the coils the train moves along in perfect step with the advancing field. IE the motion is synchronized to the field.

LIM's work slightly differently. Instead of having magnets on the train, there are electricly conductive metal plates. As these plates advance through the magnetic filed created by the coils on the track, electrical currents and "induced in the plates. The electrical currents in the plate then result in the creation of a second magnetic field which interacts with the magnetic field from the static coils producing the thrust. The train doesn't quite move in synchronous with the fields in the track coils as some slippage is required to produce the electrical current and magnetic fields in the plates. This is the principle that most household and industrical AC motors work on except clock motors.

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Wednesday, September 11, 2002 9:04 AM
LSM magnets are also more efficient, requiring less energy to launch.
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Wednesday, September 11, 2002 1:53 PM

Thanks everyone for clearing this up for me.

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105 coasters, and the Cyclone still tops 'em all.

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