B6-4 Engine Flight Pack

The Estes B6-4 Engine Flight Pack is a dependable option for educators bringing hands-on rocketry into the classroom. With a total impulse of 5.00 N-sec and a 0.8-second thrust duration, this engine is well-suited for mid-weight models used in structured STEM activities. Its 4-second delay ensures a clear coast period before recovery deployment, helping students observe the full flight profile and engage more deeply with the physics of flight.

This engine is a strong match for middle and high school rocketry programs, offering a reliable balance of power and safety for repeated classroom use. With a maximum lift weight of 4.0 oz (113 g), the B6-4 supports a wide range of Estes kits often used in STEM curriculum, making it a flexible choice across multiple grade levels and project types.

Each flight pack includes 3 B6-4 engines, 4 starters, 4 starter plugs, and 12 sheets of recovery wadding—providing educators with everything needed to support multiple student launches. This all-in-one packaging makes prep simple and efficient, saving teachers time while ensuring students have a complete launch experience from ignition to recovery.

Whether you're facilitating your first launch day or managing a full semester of aerospace exploration, the B6-4 Engine Flight Pack offers the reliability and performance educators need to teach core concepts in physics, engineering, and problem-solving through real-world rocketry.

ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.