C5-3 Engines

The Estes C5-3 engine is a reliable choice for educational rocketry programs that require consistent performance, controlled recovery timing, and moderate thrust. With a total impulse of 10.00 N-sec and a thrust duration of 1.85 seconds, this engine provides a smooth, sustained boost that supports safe, observable flight paths for mid-weight classroom rockets.

Its 3-second delay makes the C5-3 ideal for rockets that reach peak altitude quickly or need recovery deployment earlier in the flight arc. This feature is especially useful for models with added drag, additional payloads, or design modifications made by students. With a maximum lift weight of 8.0 oz, it supports a wide range of STEM builds while ensuring reliable recovery for continued use and analysis.

Each package includes 3 C5-3 engines, 4 starters, and 4 starter plugs—enough for multiple launches and repeated testing scenarios. Estes engines are engineered to meet rigorous safety and quality standards, giving educators confidence in every launch. The components are easy to handle and integrate seamlessly into guided lessons, engineering challenges, or student-led rocket design projects.

Whether used for performance comparisons, flight data collection, or simply to demonstrate Newton’s laws in action, the C5-3 offers educators the flexibility to align hands-on experiences with classroom learning objectives. It’s a dependable resource for helping students explore rocketry, physics, and aerospace engineering concepts in a tangible and engaging way.

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.