The Estes C6-5 is an 18 mm single-stage model rocket engine designed for rockets weighing up to 4.0 ounces or 113 grams. Its strong thrust and five-second delay make it well suited for medium-sized models that benefit from a longer coast period before recovery system deployment. Each package includes three C6-5 engines, four starters, and four starter plugs, providing the essential ignition components needed for multiple launches with compatible model rocket equipment. The C6-5 delivers a total impulse of 10.00 N-sec with a maximum thrust of 15.30 Newtons or 3.4 pounds. Its thrust duration is approximately 1.60 seconds, followed by a five-second delay before ejection. This combination provides a sustained boost and controlled coast phase for compatible rockets. Each engine measures approximately 2.8 inches or 7 centimeters long and has an 18 mm diameter. The engine weighs approximately 0.85 ounces or 24.1 grams and contains approximately 0.43 ounces or 12.2 grams of propellant. The C6-5 can be used with compatible model rockets including the Antar, Big Bertha, AstroCam, and Alpha III. Its predictable performance makes it a practical choice for educational programs, hobby launches, club events, and recreational flying. 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.
