...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.

Powder Keg

Powder Keg

23 October, 2016 by Gazza

...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.

In this photo