Marimo Labs Water Rocket Launcher

Unleash the power of fun and discovery with our Water Rocket Launcher kit!

This kit lets you launch water rockets in no time. It works with a wide range of soda and seltzer bottles, so you can start your rocket experiments with items you already have at home. Its small size and easy setup make it perfect for both beginners and enthusiasts. Whether for educational purposes or just for the thrill of launching, this water rocket system promises excitement and learning opportunities for all ages.

Through an exclusive partnership with Marimo Labs, MacyMakes3D offers this unassembled kit of the most current Launcher design. Everything needed to assemble the launcher is included, including both printed and non-printed parts.  Parts are printed out of PETG with US-manufactured polymers for durability and temperature resistance. All you'll need to get your rocket off the ground is a plastic soda or seltzer bottle, water, and a compressed air source.

The Marimo Labs Water Rocket Launcher is a product of a global collaboration to create a universally-compatible 3D-printed water rocket launcher to advance science and engineering education. Sales proceeds go toward advancing the project and increasing accessibility for educators.

Additional information, including build videos and detailed discussions, are available at:

https://www.printables.com/model/86434-water-rocket-launcher

https://www.marimolabs.com/water-rocket-launcher/

Kit Contents

Printed Parts (most current versions)

1x Base v1.22

1x Collar v1.42

6x Clamp v1.44

1x Core Type B v1.2

1x Launch Pin v1.2

3x Leg v1.05

3x Peg v1.41-L

1x Carrier v1.31

1x Schrader Valve Tool v1.0

Non-Printed

1x TR414 Tire valve stem

1x O-ring 15mm ID x 3.5mm thickness x 22mm OD

1x Hose extension 8”

1x Reusable straw, 9”

3x silicone rubber bands #33 (3 1/2" x 1/8")

10ft string Launch Pin

Safety disclaimers

Note that this launcher design remains an experimental work-in-progress and is not a toy. This kit is made available for convenience and is not warranted for suitability for a particular purpose. Design defects may exist. A responsible supervising adult must make a determination of whether your particular combination of printed and non-printed parts, ground anchoring systems, bottles, hoses, pressurizing systems, personal protective equipment, protocols, users, and environment are safe for your application. 

The launcher must be firmly anchored to the ground for use. Never point at anyone or anything. No one should ever have any body parts above a pressurized bottle, as the bottle may disengage unexpectedly at any time and cause injury. Heat may cause deformation of parts and all parts should be inspected before every use.

Pressurized systems are inherently dangerous. Adult supervision is always required. No warranty or guarantees are made regarding the safety, performance, or completeness of any designs, models, instructions, or analyses presented.