E12-4 Engines

The Estes E12-4 engine delivers impressive power and reliability for your next launch, making it a top choice for rocketeers ready to step up from smaller engines. With a 24mm diameter and 30.00 N-sec of total impulse, this versatile engine provides consistent, exciting flights that never fail to thrill. Whether you’re building new rockets or upgrading existing favorites, the E12-4 offers dependable thrust and excellent performance across a variety of models.

Engineered with precision and designed for excitement, the E12-4 is perfect for upper stage flights but can also be used as a single stage engine. With a strong maximum thrust of 30.60 Newtons and a thrust duration of 2.70 seconds, it strikes the perfect balance between raw lift-off power and sustained acceleration. The 4-second delay adds an ideal pause before ejection, creating smooth, realistic flight sequences that mimic the real thing.

Capable of lifting rockets up to 17 ounces, the E12-4 is an excellent choice for mid-size rockets that need just the right amount of strength to reach soaring altitudes. It’s a versatile addition to your engine collection, giving you flexibility to experiment with different models and flight profiles while ensuring reliable ignition and performance every time you launch.

Each E12-4 engine pack comes with everything you need to get flying quickly, including starters and starter plugs for easy setup. Whether you’re preparing for a weekend launch or stocking up for multiple flights, the Estes E12-4 ensures that every mission begins with the perfect balance of power, timing, and excitement.

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.