The Estes C11-7 is a 24 mm single-stage model rocket engine designed for lightweight to mid-sized rockets weighing up to 4.0 ounces or 113 grams. Its strong thrust and seven-second delay make it well suited for streamlined models that benefit from an extended coast period before recovery system deployment.
Each package includes two C11-7 engines, two starters, and four starter plugs, providing the essential ignition components needed for multiple launches with compatible model rocket equipment.
The C11-7 delivers a total impulse of 10.00 N-sec with a maximum thrust of 22.10 Newtons or 4.9 pounds. Its thrust duration is approximately 0.80 seconds, followed by a seven-second delay before ejection. This combination provides a quick boost and a long coast phase for compatible rockets designed to take advantage of higher-altitude flight profiles.
Each engine measures approximately 2.75 inches or 7 centimeters long and has a 24 mm diameter. The engine weighs approximately 1.19 ounces or 33.7 grams and contains approximately 0.44 ounces or 12.4 grams of propellant.
The C11-7 is a practical choice for compatible mid-sized rockets, altitude-focused flights, and models that require a longer delay before recovery deployment. Its performance makes it suitable for advancing and experienced rocketeers seeking more power and coast time without moving to a D-class engine. Always verify the rocket manufacturer's recommended engine configuration before use.
Purchasers and users of Estes model rocket engines are responsible for following all applicable local, state, and federal laws, regulations, and safety standards. Model rocket engines must be handled and used only as intended and in accordance with established model rocketry safety practices. Estes Industries, LLC disclaims liability for personal injury, property damage, or other loss resulting from misuse, improper handling, or unauthorized use of its model rocket engines.
