1/2A3-2T Rocket Engine

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The Estes 1/2A3‑2T is a single-stage 13 mm 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. Includes: - 4 1/2A3-2T Engines - 4 Starters - 4 Starter Plugs PLEASE NOTE: You must have a physical address for delivery. Show more