sabian

Air powered rocket.

An air powered rocket is a simple contraption made from a bottle, card board fins ,a bike pump, cork and a bike pump valve.

Air fills the bottle-rocket as you pump. As you squash more  and more air into the bottle the pressure increases. Eventually the air pressure will be strong enough to push the cork out.

As the water and air come out the bottom of the bottle, the bottle is pushed in the opposite direction. When the water and air mix goes down, the bottle-rocket goes up! Because the bottle-rocket doesn’t weigh very much it goes a long way up. We put water in the bottle because water is much heavier than air. So the rocket will go further.