Bottle rocket

A bottle rocket is a bottle with fins and a nose cone attached on to it, the rocket is propelled by water. My bottle rocket went about 20 meters in the air, it worked very well. The rocket was about 20 cm tall and weighed  40 grams. Below is a video of my rocket flying.

One thing I learned while making the rocket was keeping the ship balanced would make the rocket fly much higher than if it was not balanced correctly. This is because if the rocket is too heavy on one side it would flip and land on the ground before it was empty of water.