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Fuel your next launch with the Estes B6-4 Engine Flight Pack — designed for smooth, powerful, and reliable rocket flights every time!

About the B6-4 Engine Flight Pack

Power, Precision & Reliable Performance

The Estes B6-4 Engine Flight Pack is the perfect choice for powering mid-sized model rockets with smooth, consistent launches. Featuring a total impulse of 5.00 N-sec, a 0.8-second thrust duration, and a 4-second delay, it delivers an ideal mix of power and control for rockets up to 4.0 oz. Each pack includes 3 engines, 4 starters, 4 plugs, and 12 sheets of recovery wadding — everything you need for multiple safe, reliable, and exciting flights.

Features:

• Ideal for mid-sized model rockets up to 4.0 oz
• Provides 5.00 N-sec total impulse for balanced power
• 0.8-second thrust duration for smooth acceleration
• 4-second delay for stable, high-altitude performance