The Estes C5-3 is an 18 mm single-stage model rocket engine designed for mid-weight and higher-drag rockets weighing up to 8.0 ounces or 226 grams. Its strong, sustained thrust and three-second delay make it well suited for models that need confident acceleration followed by relatively early recovery system deployment.
Each package includes three C5-3 engines, four starters, and four starter plugs, providing the essential ignition components needed for multiple launches with compatible model rocket equipment.
The C5-3 delivers a total impulse of 10.00 N-sec with a maximum thrust of 20.40 Newtons or 4.6 pounds. Its thrust duration is approximately 1.85 seconds, followed by a three-second delay before ejection. This combination provides a longer powered boost and predictable recovery timing for compatible rockets.
Each engine measures approximately 2.8 inches or 7 centimeters long and has an 18 mm diameter. The engine weighs approximately 0.83 ounces or 23.6 grams and contains approximately 0.39 ounces or 11 grams of propellant.
The C5-3 is a practical choice for compatible rockets that require more sustained thrust or a shorter delay before recovery deployment. Its performance characteristics make it suitable for intermediate rocketeers, higher-drag designs, test flights, and other applications where controlled acceleration and dependable timing are important. 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.
