3D-Printed
Water Rocket Launcher
Project

Making water rocketry universally accessible through 3D printing

Snap-fit assembly. No adhesives. Portable. Worldwide compatibility. Free forever.

What are water rockets?

Water rockets, also known as water bottle rockets or soda bottle rockets, use compressed air to force water out of a bottle to launch homemade rockets high in the air. In contrast to chemical model rocketry, water rocketry is cheap, without fire hazards, and typically allowed in urban areas. They are great for summer fun, STEM learning, class projects and science fairs. 

This is a water rocket launcher system built from 3D-printed parts and readily-available off-the shelf components. No glue or adhesives are required and PVC pipes are entirely optional. If you have access to a 3D printer and a bike pump, you can make your own water rocket launcher. 

This launcher can launch narrow-neck soda/seltzer bottles found all around the world. In its simplest version, the design is snap-fit and only 5 non-printed parts are required. The total cost for each launcher is under US $10.

Link to Printables.com

All 3D models, free to download without registration. Includes parts lists, latest updates, and Makes from around the world.

Limited model cross-post available at MakerWorld.

Link to Instructables.com

Full written and video instructions to build and set up the launcher. Updated to current Version 1.4. Featured Instructable August 2023.

Design Notes

Detailed notes about the water rocket launcher design. Deep dives on system theory, Core and Base subassemblies, and safety considerations.

Video Highlights

Collections of launches, build instructions, and introductory videos.

Collaboration

This project is a powered by a collaboration of people with passion for education, making, and inspiring the next generation of scientists and engineers.

Posting of Makes on Printables or MakerWorld and feedback about the design is always appreciated.

There are a few areas where specialized volunteer skills are needed:

If this describes you or someone you know, please reach out.

Disclaimer: Pressurized systems are dangerous. Know what you are doing and take appropriate safety precautions. Make your own assessment about whether this project is appropriate for what you are trying to do, and use at your own risk. Do not attempt without appropriate experience, protective equipment, and tools. Most water rocket guides recommend not pressurizing past 60psi/4 bar. Always secure the launcher to the ground.

Changelog