Half Cat Rocketry’s mission is to make liquid rocket motors a much more open and accessible part of amateur rocketry. We will gladly advise any university team or skilled amateur who wants to build one by providing guidance on project scope, system architecture, and technical details. We are also available to give presentations about our work.

Please fill out our contact form or email contact@halfcatrocketry.com and introduce yourself, and we’ll get a conversation going.

Join our discord server, where we can answer questions faster and you’ll find many other teams working on liquid rockets who are happy to help out.

HalfCatSim

This tool fully simulates nitrous oxide liquid motors. It is an original program, written in Excel for broad accessibility and usability.

Pressure Vessel Design

We offer a comprehensive guide to creating the simple bolted and snap-ring designs traditionally used in amateur rocket motors. This document covers pressure vessel basics, combustion chambers, fuel and oxidizer tanks, solid motors, and the calculations needed to analyze the stresses they will experience.