The Best Half Cat Rocketry Alternatives in 2026

This project documents an amateur-built liquid-fueled rocket engine and flight vehicle, including engine project pages.

ThrustCurve provides model and high-power hobby rocket motor data, including manufacturer specifications and certified performance.

Ye Olde Rocket Forum hosts discussions and recent activity about rocketry.

The National Association of Rocketry provides information and resources for hobby rocket enthusiasts.

Hot Nozzle Society shares information about its rocketry community and a July gathering.

John Coker shares information about model and high-power rocketry through his rocketry site.

Richard Nakka's Experimental Rocketry site shares updates and technical resources about experimental rocketry.

Tripoli Rocketry shares information about rocketry and activities in its community.

openMotor simulates internal rocket motor ballistics, estimating chamber pressure and thrust from propellant, grain geometry, and nozzle details.

This repository contains code for the ThrustCurve.org site, which began as a collection of simulator files based on actual rocket motor firing data.

QPaths offers physics and science learning pathways for amateur and experienced learners and provides a community link.

eCalc simulates electric drives for radio-controlled models and helps users select motors and components.

The OpenRocket wiki provides collaboratively written documentation for the open-source model rocket simulator.

OpenRocket is model rocket simulation software with a download and information about supported operating systems.

V2Rocket provides experimental rocketry updates and a way for visitors to send comments and questions.

Jacobs Rocketry documents experimental rocketry using sugar propellant.

RocketPy provides software and information for rocket flight simulation.

Terence Tao shares research updates, expository papers, open problem discussions, and other mathematics topics on this page.

Matthen shares math and science animations through an archive and a contact option.

The Open Source Data Science Masters site shares reflections and materials from a six-month data science study program.

Images of Elements shares information and photos of pure chemical elements under a Creative Commons license.

Full Stack Deep Learning shares news, community resources, and courses for people who build products using AI.

Evan Chen's site shares course notes, olympiad materials, teaching resources, and a blog.

Louis Dorard’s OWNML blog shares writing about technology and data topics.