The Estes A3-4T engine is a mini single-stage model rocket engine designed for lightweight rockets, making it a valuable addition to any retail model rocketry lineup. With a total impulse of 2.50 N-sec and a peak thrust of 6.80 newtons (1.5 lbs), this 13 mm diameter engine delivers consistent, reliable performance for rockets up to 2.0 ounces (57 g). The 4-second delay before ejection provides hobbyists with dependable recovery system deployment and stable flight paths.

With a thrust duration of 0.60 seconds, the A3-4T is ideal for rockets requiring moderate thrust and a longer coast phase before ejection. Its predictable performance and proven reliability make it a popular choice among model rocketeers, offering retailers a strong-selling option for customers flying lightweight rockets with mini engines.

Each retail pack contains four A3-4T engines, four starters, and four starter plugs—providing a complete launch solution for consumers. The inclusion of starters and plugs simplifies purchasing and makes these packs an easy choice for hobby shops looking to offer all-in-one solutions on their shelves. With trusted Estes quality, these retail-ready packs support both individual sales and repeat purchases.

The A3-4T engine’s balanced thrust, consistent performance, and convenient packaging make it a reliable, high-turn product for retailers stocking model rocketry essentials. Backed by Estes’ reputation for quality, it’s a proven engine choice that supports customer satisfaction and store loyalty.

ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® 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 Estes® 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.