Estes B6-4 Engines/3pk EST10021

Explore the Estes B6-4 Engines/3pk at MegaHobby. This model rocket engine pack is selected by its complete engine designation, not simply by the letter class.

Product features and specifications

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

Select the exact recommended engine

Match the full engine code, physical size and application to the rocket manufacturer’s instructions. Different delays and booster designations are not interchangeable choices. Check the listed pack contents before ordering and confirm which launch supplies are already included.

Explore Estes at MegaHobby

Browse Estes rockets and supplies and Estes Model Rocket Engines. Explore the wider Model Rocketry collection, then find building tools and finishing materials in the Paint Store.