The Estes A3-4T engine is a single-stage mini model rocket engine built for lightweight rockets and designed to deliver consistent, reliable performance. 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 provides a solid boost for rockets weighing up to 2.0 ounces (57 g). Its 4-second delay allows for a steady coast before the ejection charge activatesâhelping ensure a controlled flight and dependable recovery system deployment.
With a thrust duration of 0.60 seconds, the A3-4T delivers a quick, moderate-power lift-off thatâs ideal for rockets requiring a longer delay before ejection. Whether you're launching a favorite kit or testing a new build, the A3-4T supplies reliable thrust and timing that supports a predictable flight pathâperfect for hobbyists looking for dependable performance from a mini engine.
Each engine pack includes four A3-4T engines, four starters, and four starter plugsâeverything you need for multiple launches. The included starters and plugs ensure reliable ignition with every flight, eliminating the need to purchase ignition components separately and making launch preparation simple and efficient.
Known for its consistent performance and Estesâ trusted manufacturing quality, the A3-4T is a dependable choice for model rocketeers flying lightweight rockets. Its proven design, balanced thrust, and predictable delay make it a go-to engine for reliable single-stage flights.
ATTENTION: Estes Industries, LLC requires all purchasers and users of EstesÂź 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 EstesÂź 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.
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