E12-4 Engines

The Estes E12-4 engine is a powerful choice for classrooms, camps, and STEM programs that want to take rocketry learning to the next level. With 30.00 N-sec of total impulse, this 24mm engine provides the boost needed to fly mid-size rockets, giving students an unforgettable demonstration of applied physics and engineering in action.

Designed with both performance and reliability in mind, the E12-4 features a 4-second delay that allows rockets to coast smoothly before recovery deployment. This timing helps demonstrate key flight concepts such as thrust, coast, and ejection, making each launch a hands-on lesson in aerodynamics and Newton’s laws of motion. Its dependable ignition and consistent results ensure successful launches that keep students engaged and inspired.

Capable of lifting rockets up to 17 ounces, the E12-4 is ideal for projects that use larger or more advanced rocket kits. It provides educators the flexibility to challenge students with higher-altitude flights while still staying within safe model rocketry guidelines. This engine bridges the gap between smaller classroom flights and more advanced demonstrations, making it a versatile tool for teaching STEM in a memorable way.

Each package includes 2 engines, 2 starters, and 4 starter plugs, giving educators everything they need to run multiple lessons or activities. Whether for a classroom experiment, a summer camp program, or a science club launch, the Estes E12-4 brings both excitement and educational value to every flight.

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.