LSM vs. LIM?

I was wondering, what is the difference between and LSM launch and and LIM launch? I've heard many different coasters that are launched referred to as both. For example, Superman:The Escape. It's been referred to as both? Can someone please clarify this issue?

A new web page answering exactly that question will be opening up in a couple of days. Hint: The URL starts with http://capital2.capital.edu/admin-staff/dalthoff/ :)

In a nutshell: An LSM is a Linear Synchronous Motor while a LIM is a Linear Induction Motor. The synchronous motor has a fixed magnetic field in either the rotor or the stator (in the case of Superman: The Escape it is a permanent magnet on the bottom of the vehicle) while the induction motor uses an induced magnetic field in the reaction plate...the aluminum fin attached to the train.

--Dave Althoff, Jr.

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Now that it's officially open, I can finish off that URL I gave earlier:
http://capital2.capital.edu/admin-staff/dalthoff/lim.html

--Dave Althoff, Jr.

Thanks!

Very informative. Thanks!