Water rockets

The challenge is to land an air pressurised rocket, using water as a propellant, exactly 70 m from launch point, three times, with extra points for flight duration. We have a big annual festival on our site where teams compete.

On this page are some awesome videos, photos and results from previous years’ Water Rocket Challenges.

Water rockets are fun and easy to make

We have some posters of water rocket scientific facts and design tips, as well as a video made in association with a local school on the science of water rockets:

• Poster: Forces on water rockets
• Poster: Designing and refining water rockets
• Video: School science of water rockets video

Download our comprehensive booklet about building water rockets which helps you improve flight and understand the physics involved.

• Booklet: Guide to building and understanding the physics of water rockets 

Rocket Simulator

Check out this Water Rocket simulator software! It is described in the booklet and helps you improve flight and understand the physics involved (be amazed at the temperatures of water and air leaving the rocket).

Software: Water Rocket simulator  [Windows only 2.84MB]

Did you know?

NPL constructed a water rocket powered car which featured on the Gadget Show.

We also held the record for making the world's largest water rocket,
launched in 2011 – using 140 x 2 litre bottles and stood 3.4 m tall.

Contact us

#WaterRocketChallenge