The Estes 1/2A3-4T engine is a mini single-stage engine designed for lightweight model rockets—an essential addition to any retail inventory of hobby products. With a total impulse of 1.25 N-sec and a peak thrust of 8.3 newtons, this 13 mm diameter engine delivers consistent, quick-thrust performance. Its 4-second delay provides reliable ejection timing, supporting dependable flight patterns that hobbyists can trust.

Sized for rockets weighing up to 1.0 ounce at liftoff, the 1/2A3-4T offers a sharp 0.3-second thrust duration, making it ideal for controlled, short flights in lightweight models. This engine is perfect for hobby stores looking to stock trusted Estes products known for their quality and flight consistency. Its proven performance helps ensure customer satisfaction and supports repeat business from model rocketry enthusiasts.

Each retail-ready pack contains four engines, four starters, and four starter plugs—an all-in-one package that makes it simple for stores to offer a complete engine solution. The straightforward packaging streamlines shelf stocking and provides consumers with everything they need for multiple launches without the need for separate accessory purchases.

With Estes' reputation for quality and flight reliability, the 1/2A3-4T engine is a solid choice for hobby and specialty retailers looking to stock dependable mini engines. Its performance, packaging, and brand recognition make it a smart addition to any model rocketry assortment, supporting both individual sales and multi-pack purchases.

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.