...When the the train is ready to launch air is pumped into one end of the pressure tube and removed from the other. This makes the piston in the tube move at high speed, pulling the cable, and hencd the train along with it.
...When the the train is ready to launch air is pumped into one end of the pressure tube and removed from the other. This makes the piston in the tube move at high speed, pulling the cable, and hencd the train along with it.