D12-5 Engines

The Estes D12-5 engine is an excellent choice for educators guiding students through hands-on STEM activities in rocketry. With its high-thrust performance and 5-second delay, this engine allows rockets to continue coasting after burnout before the recovery system is deployed—an ideal feature for teaching flight dynamics, delay timing, and recovery principles in real-world applications.

Designed for rockets that require D-engine power, the D12-5 supports a range of heavier or more complex models often used in classroom builds or advanced rocketry units. It’s especially useful for demonstrating the relationship between thrust, mass, and flight trajectory. The longer delay gives students a clear example of how coast time impacts altitude and when recovery systems should be triggered for optimal performance.

Each pack includes two D12-5 engines, two starters, and four starter plugs, providing everything needed to prepare for launch day. The components are easy to use, making this engine a practical option for educators leading group activities or managing multiple student projects. Estes’ consistent engine quality ensures a dependable launch experience, reducing downtime and helping students focus on learning.

Whether used in a science class, STEM camp, or extracurricular program, the D12-5 engine supports engaging, standards-aligned lessons in physics, engineering, and aerodynamics. It’s a dependable tool for inspiring curiosity and delivering hands-on experience in rocketry that students will never forget.

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.