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B6-4 EnginesThe B6 4 is a widely trusted and well balanced engine that offers reliable performance across a variety of model rocket kits. With a moderate level of thrust and a 4 second delay, it allows rockets to coast effectively before activating the recovery system, making it ideal for rockets that benefit from a longer delay phase after burnout. Designed for single stage rockets weighing less than 4. 0 ounces, the B6 4 engine delivers consistent results and

Because the rocket returns quickly and safely

The Estes B6-2 engine is a standard single-stage model rocket engine designed for reliable flight performance in classroom settings and group launch activities

body tubes

rotating lab schedules

giving teachers a consistent and predictable platform for instruction

Engineering-Focused STEM Learning for the Whole Class

With the recommended A10-3T engine

the Saturn V challenges students with high-level model construction that sharpens problem-solving

and durable body tubes—ideal for classroom labs

Big Bertha is built using durable Estes body tubes

Students can launch the first stage alone to analyze its performance or add the second stage for even more impressive heights

helping transition America’s space program from lunar exploration to extended orbital missions

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