What is the primary function of the reduction gearbox in an aircraft?

The primary function of the reduction gearbox in an aircraft is to reduce the high rotational speed of the engine to a lower, more manageable speed suitable for the propeller. In many aircraft, engines may operate at extremely high RPMs, sometimes around 30,000 RPM or higher, while propellers are designed to function effectively at much lower speeds, typically around 2,000 RPM. The reduction gearbox facilitates this essential conversion of speed, ensuring the propeller operates within its optimal range for efficient thrust generation and performance.

This function not only allows for the safe operation of the aircraft components but also ensures that the power generated by the engine is effectively transmitted to the propeller without causing damage or inefficiency.