1/2A3-4T Engine Bulk Pack

Bring hands-on STEM learning to life with the Estes 1/2A3-4T Engine Bulk Pack. This mini engine delivers the perfect balance of power and control, allowing students to observe the science of thrust, flight, and recovery in real time. Its shorter burn and lighter lift capacity make it ideal for smaller rockets, ensuring safe and predictable performance for classroom and group settings.

Teachers and group leaders can count on Estes engines for their precision manufacturing and proven reliability. The 1/2A3-4T provides consistent results from launch to launch, helping students focus on understanding the scientific principles behind each flight instead of worrying about inconsistent performance. Its moderate altitude range also allows for easier tracking and recovery, keeping activities organized and efficient.

Engine bulk packs are designed to simplify group instruction by providing everything you need for 24 complete launches. From engines and starters to plugs and recovery wadding, each component is made to work seamlessly together. This convenience saves time during preparation and allows educators to dedicate more time to teaching concepts like Newton’s Laws of Motion, energy transfer, and flight stability.

Whether you are guiding students through their first launch or coordinating a science camp activity, the Estes 1/2A3-4T Engine Bulk Pack is a dependable and educational way to make rocketry an unforgettable experience. With Estes, every launch becomes a lesson in creativity, curiosity, and discovery.

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.