The Estes B4-2 is a dependable single stage model rocket engine built for consistent, enjoyable flights in lightweight rockets. Designed to deliver steady, usable thrust for rockets under 4 ounces, this engine gives hobbyists reliable lift and smooth flight profiles that make launching simple and satisfying.

Whether you are teaching a new rocketeer, flying at a club launch, or enjoying backyard hobby flights, the B4-2 balances performance and predictability. Its clean burn and dependable ignition help reduce launch day surprises so you can focus on building great flights and good memories.

Includes:

3 × B4-2 Engines

4 × Starters

4 × Starter Plugs

PLEASE NOTE: You must have a physical address for delivery.