Open Source
Liquid Rocket Motors
Half Cat Rocketry is an organization dedicated to developing affordable and reasonable amateur liquid rocket propulsion systems. Our goal is to make liquid rockets accessible to students and individuals by publishing information on design, build, and launch.
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42 Launches | 33 Static Tests
First firing 15 December 2020
4 Launches performed in one day
Featured
Latest Activity
Half Cat Walking II
The second serial number of Mojave Sphinx launched twice on July 20, this vehicle an identical copy of the original built as a test of the assembly instructions in HCR-5100.
HCR-5100
The Mojave Sphinx guidebook has officially been released, allowing students and individuals to build their own rocket with confidence that it will be successful.
Desert Winds
Project Sunride from the University of Sheffield launched Desert Winds, the UK's first amateur liquid rocket and one inspired by Half Cat Rocketry. It reached an altitude of 26,879 feet, the new record for European student built liquid rockets.
Support Half Cat Rocketry
Rocket engines are expensive, and they take time. We’re dedicated to providing the rocketry community with a totally unique and open-source architecture, but it comes out of our own pockets and hours in the day. If you find our work to be useful, please consider making a donation to support our efforts.
Contact Us
We’d love to chat with you - send us a message through our contact form or message us on Twitter or Discord.