Model Rockets B6-4

The Estes B6-4 Engine Flight Pack is an ideal upgrade for rocketeers ready to launch mid-size model rockets with reliable power and performance. With a total impulse of 5.00 N-sec and a thrust duration of 0.8 seconds, these engines are built to deliver strong takeoffs and smooth mid-flight transitions for a wide range of rocket kits. Each engine is equipped with a 4-second delay, allowing for optimal coast time before deployment.

Capable of lifting rockets up to 4.0 ounces (113 grams), the B6-4 engine is perfect for mid-weight models that require a balance of power and stability. Whether you're experimenting with new designs or flying a trusted favorite, this engine offers consistent launches and dependable ejection timing. The max thrust of 12.10 newtons (2.7 lbs) gives your rocket the punch it needs to get airborne fast.

Each flight pack comes with everything you need for multiple launches: 3 B6-4 engines, 4 starters, 4 starter plugs, and 12 sheets of recovery wadding. With all components conveniently included, you can spend more time building and flying, and less time gathering materials. The recovery wadding helps protect your parachute or streamer from the engine’s ejection charge, ensuring your rocket is ready for its next flight.

If you're looking to elevate your next launch with a tried-and-true engine that delivers solid performance, the B6-4 is a go-to favorite among hobbyists. With its balanced power and ideal delay, it’s a versatile choice for a wide range of rocket designs.