B6-4 Engines

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