mike-z: a sewing machine motor is a little larger than that...and runs off the mains.
You could always form a club where members race them, like the belt-sander-racing clubs. Get a plank of wood, cut a notch in the back, mount a rubber wheel on the motor, then mount it to the plank. Attach two wheels to the front, plug into a 50ft extension cord, then let 'er rip.
Or shall I go sit in the corner again?
