C11-3 Engines (12 pk) Grades: 4–12+ Number of Students: 1–30 Number of Lessons: NA Hours of Content: NA Highlights: Launch farther and faster with the C11-3 Engine Bulk Pack, a 12-pack of dependable, high-performance C-class rocket engines designed for hobbyists, backyard flyers, and families who want exciting, repeatable flights. These engines deliver a lively boost and a clean 3-second delay for consistent apogee and reliable parachute deployment, making them perfect for weekend launch sessions and group events. Curriculum or Lesson Topics: The C11-3 Engine Bulk Pack gives you twelve ready-to-fly C-class motors engineered for consistent lifts and eye-catching altitudes. Each motor produces a strong but controllable burst of thrust and a 3-second delay that works well with medium-weight rockets — ideal for weekend hobbyists, family launch days, and solo flyers who want exciting flights without stepping up to larger, more complex powerplants. Beyond raw numbers, the C11-3 shines because of its reliability and repeatability. Whether you’re testing trim changes, teaching a new builder the basics, or simply chasing higher flights, these engines reduce the variability that can spoil a flight day. The familiar, crisp ignition and predictable delay let you tune recovery systems with confidence so recovery is clean and repairs are minimal. Technically tuned for mid-to-high altitude performance, the C11-3 offers a total impulse of 10.00 N·s, peak thrust suitable for rockets with a max lift weight around 6.0 oz (170 g), and a short 0.80 second thrust duration that gets rockets off the pad quickly. Dimensionally these are standard 24 mm diameter motors — a match for many of our popular mid-size kits and ideal for repeat launches during a club meet or family outing. Safety-first and user-friendly, these bulk packs include starters, starter plugs, and plenty of recovery wadding so your focus stays on flying. Always follow Estes and NAR safety guidelines when handling and installing motors, and store engines in a cool, dry place. Ready to step up your launch day? The C11-3 bulk pack is a reliable way to fill your flight schedule with consistent, thrilling launches. What’s Included: What makes the C11-3 special is its blend of power and predictability: more thrust than an A or B motor but still tame enough for safe, fun flights with mid-size rockets. Builders and flyers will appreciate how consistently these motors perform, so you spend less time troubleshooting and more time sharing great flights with friends, family, or students. Includes: 12 × C11-3 Engines 20 × Starters 16 × Starter Plugs 144 × Squares of Recovery Wadding Technology Requirements/Specifications: Review the full specifications for the C11-3 Engines, including impulse, thrust duration, delay, and physical dimensions. Special Notes and Considerations: PLEASE NOTE: You must have a physical address for delivery. 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.
