A3-4T Engines variant-46653592600869-has-digital-downloads No assembly required

No assembly required

helping countless students experience the thrill of rocketry for the first time

It's a trusted engine for bringing aerospace concepts to life in hands-on

Lil’ Spite demonstrates how aerodynamic design affects performance

It works seamlessly with the NC-50 nose cone

A3-4T Engines variant-46653592600869-has-digital-downloads No assembly requiredThe Estes A3 4T engine is a mini single stage model rocket engine designed for lightweight rockets, making it an excellent choice for classroom launches, student projects, and hands on STEM programs. With a total impulse of 2. 50 N sec and a peak thrust of 6. 80 newtons (1. 5 lbs), this 13 mm diameter engine reliably powers rockets weighing up to 2. 0 ounces (57 g). Its 4 second delay allows for a steady coast phase before ejection, helping students