The Estes engine is what makes model rocketry exciting and safe.

Each engine is coded with certain information that informs the user of the type of engine and its power.

The engines that are most frequently used have the following internal features.
- Propellant that burns to generate thrust.
- A delay fuse that burns slowly for a predetermined time span. This allows the rocket to slow down before the parachute is deployed.
- A parachute ejection charge that is ignited when the delay fuse burns completely. This generates hot gases that fill the internal chamber of the rocket to deploy the parachute.

Click to see how it all works.