The rocket engine is based on Newton’s third law. From the burning of the propellant inside the Casing.
The Casing function is to involve the other components of the engine. It needs to be very resistant to withstand the high internal pressure generated by the expansion of gases.
The nozzle’s function is to provide the greatest possible acceleration to the gases generated in the combustion chamber.
The propellant has the function to induce the rocket propulsion. our method of propulsion it’s solid chemistry.
The bulkhead has the function to seal one end of the Casing. It needs to be very resistant to withstand the internal pressure.
The function of the retaining ring is to contain the gases from the combustion chamber, preventing them from leaking through crevices or openings other than the nozzle.
The centering ring is designed to ensure that all engine parts are kept in their proper places and properly centered.