The Estes C6‑5 is a single-stage 18 mm engine designed for rockets under 4 oz. Offering 10 N‑s impulse, 15.3 N thrust, and a 5‑second delay, it delivers stable, mid-power flights. Each pack includes three engines, four igniters, and four plugs.
Perfect for models like Antar™, Big Bertha®, AstroCam®, and Alpha III®, the C6‑5 provides reliable performance for educational, hobbyist, and small‑field launches.
The Estes C6‑5 engine is a single-stage, 18 mm standard engine crafted for rockets weighing less than 4 oz (113 g) including the motor. Perfect for mid-sized beginner and intermediate rockets, it offers a powerful yet controlled flight experience. Each pack includes three C6‑5 engines, four igniters, and four starter plugs, making it easy to launch multiple rockets with minimal prep.
This engine delivers a total impulse of 10 N‑s, a sustained average thrust of 15.3 N (3.4 lb), and a burn duration of approximately 1.6 seconds—ideal for achieving moderate altitude lift-offs. With a 5‑second delay between burnout and ejection, it gives rockets ample time to coast to apogee for smooth recovery system deployment.
Measuring 2.8″ long and 18 mm in diameter, the C6‑5 fits a wide range of Estes rockets like Antar™, Big Bertha®, AstroCam®, and Alpha III®. Weighing just 0.85 oz (24.1 g) with 0.43 oz (12.2 g) of propellant, this engine balances power and precision, delivering consistent flight trajectories every time.
Backed by Estes’ legacy of quality and reliability, the C6‑5 is a go-to for educational programs, hobbyist launches, and model rocket enthusiasts seeking dependable mid-power performance. It ensures repeatable, safe, and exciting flights for a wide spectrum of flying environments.
Total Impulse: 10.00 N-sec
Time Delay: 5 Seconds
Max Lift Weight: 4.0 oz (113 g)
Max Thrust: 15.30 Newtons (3.4 lbs)
Thrust Duration: 1.60 Seconds
Length: 2.8 in. (7 cm)
Diameter: 18 mm
Weight: .85 oz. (24.1 g)
Propellant Weight: 0.43 oz (12.2 g)
