The Estes 1/2A3â2T engine is a single-stage mini engine designed specifically for lightweight model rockets, especially those built on BT-5 (13 mm) airframes. Ideal for backyard launches or small-field use, this engine delivers a dependable lift-off experience for smaller, beginner rockets. Each pack includes four motors, four igniters, and four starter plugsâready for multiple launches right out of the box.
Offering a total impulse of 1.25 Nâs, peak thrust of approximately 8.3 N (1.9 lb), and a short thrust duration of 0.30 s, the 1/2A3â2T provides a quick and spirited liftoff without overtaxing lightweight models. Following burnout, a 2-second delay gives your rocket time to coast to apogee before deploying its recovery system, minimizing stress on both rocket and engine.
Compact yet powerful, this 13 mm engine measures 1.75âł in length, weighs just 0.23 oz (6.5 g), and contains 0.07 oz (1.9 g) of propellant. Its size and energy make it a perfect match for mini rockets like the Mini Alphaâ˘, Mini Berthaâ˘, Mini Der Red Maxâ˘, Mini Modâ˘, and Mini Honest Johnâ˘.
Whether used in educational settings, STEM programs, or hobbyist launches at home, the 1/2A3â2T offers consistent and reliable performance. Built to Estesâ high standards, itâs a trusted engine for rocketeers who prioritize simplicity, repeatability, and fun in small-package launches.
ATTENTION: Estes Industries, LLC requires all purchasers and users of EstesÂŽ Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of EstesÂŽ products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.
