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Estes C6-5 Rocket Engines with Plugs and Ignitors

C6 Model Rocket Engine Thrust Curve Chart

Estes 18mm Rocket Engine Assembly How-To

Estes Rockets

C6-5 Engines

$14.99

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.

Includes:: 3 × C6-5 Engines; 4 × Starters; 4 × Starter Plugs

PLEASE NOTE: You must have a physical address for delivery.

SKU 010024

Flight Performance

Understand how the C6-5 Engines deliver lift, acceleration, and a smooth flight profile from launch to recovery.

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.

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.

Technical Specifications

Review the full specifications for the C6-5 Engines, including impulse, thrust duration, delay, and physical dimensions.

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

0.85 oz. (24.1 g)

Propellant Weight

0.43 oz. (12.2 g)

Choose the Right Rocket

These rockets are designed to fly with the C6-5 Engines for optimal performance and consistent flight results.

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