Group size - minimum 1 and maximum 4.

One group - One Rocket

Maximum Attempts Allowed - Three (3)

Competitors bring their own rockets, launchers and team.

No limit for Bottle Size.

Bottle Material - Plastic

Landing point - First point of impact on ground

Rocket should land within the designated landing

All energy given to the rocket must only come from the water and air pressure combination. No other source of energy is allowed. You can only compress air manually, with a foot or bicycle pump.

No external metal parts are allowed on the rocket, but are allowed on the launch mechanism.

You are only allowed to use plastic bottles specifically designed for holding pressure, or that have been pressure tested (for example carbonated drink bottles).

Your launch apparatus must be secure and must be able to robustly control the rocket's flight direction.

No glass or sharp objects to be used in/on the rocket.

Do not use glass bottles or plastic bottles designed for still water.

For safety's sake any fast falling rockets must land in the landing zone or you will get no points for that round. If soft-landing rockets (e.g. rockets with parachutes) land outside the landing zone their time will be counted for the longest time in the air award.

The competitor who achieves the highest Total score out of 100, will be declared the winner of the Launch Competition.