This terrifying footage shows a baby carriage (empty) being dragged into the side of a freight train, just by the draught caused by the passing train.
Today’s invention, a mobile tunnel, is inspired by this.
A high speed, non stopping goods train has a small tractor unit at each end (pink at the front and green at the back). These are capable of very rapid acceleration and deceleration. The train carries a platform shield (red) on each side, which can move longitudinally along runners on the train’s side (only the right side shield is shown).
The sequence of events is:
a) Train approaches platform at very high speed, carrying the shield alongside.
b) Front, pink tractor streaks off ahead, but as it gets to the platform, it slows to a low speed. Pink tractor pulls the shield with it and feeds the shield slowly along the platform.
c) Shield is in place. train passes through station at very high speed.
The platform is shielded from the ultra fast train, so that no-one in the station is endangered.
d) Rear, green tractor detaches and moves slowly, holding the shield. The rest of train has sped away.
e) Green tractor moves shield along platform until it has been cleared. Green tractor, carrying the shield, then accelerates to catch the rest of the train.