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

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

Proveedor: Proveedor: Estes
Código de barras: 047776100138
Precio de venta $12.99
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Estes A3-4T Mini Model Rocket Engines, 4 Pack, 13mm Single-Stage Motors

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

$12.99
  • 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.

Frequently Asked Questions

What size rockets can these engines lift?
The A3-4T engines are designed for lightweight model rockets weighing up to 2.0 oz (57 g). They work with many Estes mini-engine rocket kits that use 13mm engine mounts.
What's included in the pack?
Each pack contains 4 A3-4T engines, 4 starters (igniters), and 4 starter plugs—everything you need for 4 complete launches.
How does the 4-second delay work?
The 4-second delay is the time between engine burnout and parachute deployment, giving your rocket time to coast upward before recovery systems activate for a safe landing.
Are these engines certified for safe use?
Yes, Estes A3-4T engines are NAR-certified and engineered to strict quality standards for consistent and reliable performance.
What does the 2.50 N-sec total impulse mean?
Total impulse measures the engine's power output over its burn time. At 2.50 N-sec, these engines provide enough thrust for controlled single-stage flights while remaining suitable for small rockets.