The Estes C11-7 engine fills a key niche in the 24 mm engine category—offering higher thrust than a standard C motor while keeping the total impulse manageable for lightweight rockets. With a 7-second delay, it’s an ideal option for streamlined models that benefit from extended coast times and high-altitude deployments. This engine delivers 10.00 N-sec of total impulse and a peak thrust of 22.10 newtons, giving customers a noticeable performance upgrade without stepping up to D-class power.

Perfect for intermediate flyers looking to experiment with timing and altitude, the C11-7 is also a smart recommendation for customers flying kits originally designed for B or C motors who want to explore more vertical performance. The 0.80-second thrust duration gives a clean, powerful boost that quickly clears the launch rod, while the long coast phase gives room for midair tracking and smoother ejection timing. It’s a go-to option for optimizing recovery deployment and achieving a satisfying visual flight profile.

This SKU includes 2 engines, 2 starters, and 4 starter plugs per pack—making it easy for hobby stores to bundle into build-and-launch packages or suggest as an upgrade to customers buying 24 mm compatible rocket kits. With its balance of power and precision, the C11-7 makes a strong addition to any engine display rack or restocking order.

Stocking the C11-7 helps retailers offer a broader engine range that appeals to growing rocketeers ready to go beyond standard C6 engines. Position it as a performance step-up and a complement to popular 24 mm Estes kits—ideal for hobbyists looking to fine-tune their flights or boost altitude without sacrificing control.

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.