The Estes B4-2 Bagged Rocket Engines Flight Pack is an all-in-one pack designed to give you everything you need for three exciting rocket launches. Perfect for single-stage rockets weighing up to four ounces, this trusted engine delivers consistent thrust with a five-second delay for safe parachute deployment.

About the B4-2 Rocket Engines

Convenient Bundle for High-Flying Fun

Each pack includes enough supplies for three full rocket flights. The B4-2 engine is a go-to choice for intermediate rocketeers, offering a balance between altitude and coast time for reliable performance. With updated convenience and trusted design, this bundle ensures you can focus on the excitement of countdowns and high-altitude flights instead of preparation details.

Features:

• Designed for rockets weighing up to four ounces
• Provides a five-second delay for safe recovery
• Reliable performance for single-stage rockets
• Ideal choice for intermediate-level rocketeers