Estes 1/2A3-4T Model Rocket Engine (4)

The Estes 1/2A3-4T is a low-power mini model rocket engine designed for very small, lightweight rockets. With a 4-second delay, this engine provides gentle thrust and reliable ejection timing, making it perfect for introductory mini rocket kits and first-time fliers learning the basics of rocketry.

• Total Impulse: 0.6 N-sec (Class 1/2A Engine)
• Thrust Duration: 0.5 seconds
• Delay Time: 4.0 seconds
• Maximum Lift Weight: Approximately 14 grams (0.5 oz)
• Optimal for: Very small, lightweight mini rockets requiring a moderate coast before ejection
• Recovery Delay: Allows rocket to coast to near-peak altitude before deploying recovery system

Each 1/2A3-4T engine pack includes:

• 4 1/2A3-4T engines
• 5 igniters
• 5 igniter plugs
• Recovery wadding

Recommended Use: For use in mini rockets designed for T-class (mini) engines. Ideal for beginners and low-altitude flights. Ensure safe launch practices by following the NAR Safety Code and local regulations.