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Estes C5-3 Model Rocket Engines with Plugs and Ignitors

Estes C5-3 Model Rocket Engines Assembly

Estes 18mm Rocket Engine Assembly How-To

Estes Rockets

C5-3 Engines

$14.99

The Estes C5-3 engine is built for rockets that need a stronger, steadier push from an 18 mm engine. With 10.00 N-sec of total impulse, 20.40 Newtons of max thrust, and a 1.85 second thrust duration, it gives mid-weight and higher-drag rockets the confident boost they need off the launch pad.

A 3 second delay helps bring recovery deployment earlier in the flight, making the C5-3 a smart choice for rockets that do not need a long coast before parachute ejection. It is a great option for intermediate flyers who want more control, dependable performance, and classic Estes engine reliability.

Includes:: 3 × C5-3 Engines; 4 × Starters; 4 × Starter Plugs

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

SKU 010022

Flight Performance

Understand how the C5-3 Engines deliver lift, acceleration, and a smooth flight profile from launch to recovery.

When your rocket needs a fast, steady boost and an earlier recovery, the Estes C5-3 engine delivers. With a total impulse of 10.00 N-sec and a thrust duration of 1.85 seconds, this 18 mm engine is engineered to provide a longer, sustained push off the launch pad, making it a strong match for mid-weight rockets and high-drag designs.

The 3-second delay ensures timely recovery system deployment, which is especially important for rockets with a max lift weight of up to 8.0 oz. That shorter delay window minimizes coast time and helps deploy parachutes earlier in the flight arc, leading to safer, more predictable landings; perfect for designs that don't benefit from long coasts or for flying in variable wind conditions.

Each pack contains 3 C5-3 engines, 4 starters, and 4 starter plugs, giving you everything you need to prep for multiple launches. Just add your recovery wadding, launch pad, and controller, and you’re ready for a high-thrust experience backed by Estes’ consistent engine quality and safety.

Whether you're testing new rocket configurations or simply want tighter control over recovery timing, the C5-3 engine offers a reliable balance of power and performance. It’s a go-to choice for intermediate rocketeers looking to expand their engine lineup with something both powerful and precise.

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 C5-3 Engines, including impulse, thrust duration, delay, and physical dimensions.

Total Impulse

10.00 N-Sec

Time Delay

3 Seconds

Max Lift Weight

8.0 oz. (226 g)

Max Thrust

20.40 Newtons (4.6 lbs)

Thrust Duration

1.85 Seconds

C5 Model Rocket Engine Thrust Curve Chart

Length

2.8 in. (7 cm)

Diameter

18 mm

Weight

0.83 oz. (23.6 g)

Propellant Weight

0.39 oz. (11 g)

Choose the Right Rocket

These rockets are designed to fly with the C5-3 Engines for optimal performance and consistent flight results.

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