Estes Rockets - 1/2A3-2T Model Rocket Engines (4pk) Electric Accessories Battery Charging and Balancing This is an electronically controlled

This is an electronically controlled power switch unit

Self-righting feature eliminates worries of capsizing

Central transfer case with slider driveshafts to front and rear differentials

(4) 15x26x7

a shield like attachment

Estes Rockets - 1/2A3-2T Model Rocket Engines (4pk) Electric Accessories Battery Charging and Balancing This is an electronically controlledThe Estes 1 2A3 2T is a single stage 13mm mini engine for lightweight model rockets. With 1. 25 N s impulse, 8. 3 N peak thrust, and a 2 second delay, it delivers quick and reliable launches. Packs include 4 engines, 4 igniters, and 4 plugs. Ideal for small rockets like Mini Alpha, Mini Bertha, and Mini Honest John, it's perfect for educational, hobbyist, and backyard flying.