ESTES: B6-4 Model Rocket Engines 18mm 3-Pack Bag

The 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 controlled recoveries, making it a great fit for both new flyers refining their skills and seasoned hobbyists looking for dependable flight profiles.

Whether you're launching for fun or using rockets in a STEM learning environment, the B6-4 engine provides an excellent combination of power, altitude, and control. Its predictable performance has made it a go-to for generations of rocketeers.

Each 3-pack includes everything you need for multiple flights: three B6-4 engines, starters, plugs, and recovery wadding. Just pair with your favorite Estes rocket and launch system for a fun and educational experience.

The Estes B6-4 engine is a versatile and dependable choice for launching standard-size model rockets. Designed for rockets weighing less than 4.0 ounces, it provides a solid boost with a 4-second delay for smooth parachute deployment.

Ideal for beginner to intermediate rocketeers, the B6-4 delivers a balanced combination of altitude and recovery timing—perfect for educational launches, club events, or weekend flights.

Includes:

- 3 B6-4 Engines

- 4 Starters

- 4 Starter Plugs