You have fourteen (at least), brushless DC which is effectively the same as variable frequency AC synchronous (I think). Okay you mount all fourteen sets of coils on a long frame. Wire them up to a nice powerful power supply. Throw in a bit of control software so you can put a small bit of track on the first motor and start it moving. The next one picks it up and accelerates it and so on. I saw an article once about linear servoes on a laser machine that could generate several g's of acceleration. Your bit of track could be moving at a fair speed when it left the 14th set of coils. Don't point it at anything important.
