EST1602 B4-4 Engines

Three single stage rocket motors sized 18 mm designed for model rocket flights in lightweight airframes weighing less than about 3.5 ounces including the engine. Each motor delivers a moderate total impulse with a controlled thrust profile and built-in delay before recovery deployment to help ensure consistent flight performance and predictable altitude gain. Available as a pack that includes extra starters and starter plugs for multiple launches and ready-to-use preparation. Suitable for hobby, educational, and club launches when used with recommended Estes launch systems and safety practices.

• pack includes three B4-4 engines with extra starters and plugs
• 18 mm diameter standard size compatible with most Estes model rockets
• balanced thrust for steady climb and stable flight
• built-in delay supports timely recovery system deployment
• suitable total impulse for lightweight rockets under 3.5 ounces
• easy to install and prepare with included hardware
• National Association of Rocketry certified performance for hobby launches