Estes A3-4T Mini Model Rocket Engines, 4 Pack, 13mm Single-Stage Motors

• Includes 4 Estes A3-4T mini model rocket engines, 4 starters, and 4 starter plugs for multiple launches
• Designed for lightweight model rockets using 13mm mini-engine mounts and single-stage flight configurations
• Features 2.50 N-sec total impulse with a 4-second delay for reliable boost and recovery deployment timing
• Suitable for rockets weighing up to 2.0 oz (57 g), including many Estes mini-engine rocket kits
• NAR-certified motors engineered for consistent performance in educational, hobby, and recreational rocketry applications

The Estes A3-4T Mini Model Rocket Engine Pack is designed for lightweight model rockets that use 13mm mini-engine mounts. These single-stage rocket motors deliver a balanced combination of thrust and flight duration, making them ideal for small rockets requiring reliable lift-off and controlled recovery deployment. With a total impulse of 2.50 N-sec, a 4-second delay, and a maximum lift weight of up to 2.0 ounces, the A3-4T provides dependable performance for educational, recreational, and competitive model rocketry applications. Each flight pack includes four engines, four starters (igniters), and four starter plugs, giving hobbyists everything needed for multiple launches. Estes engines are NAR-certified and engineered to strict quality standards for consistent flight performance.