What RPM does the reduction gearbox reduce engine output from?

The correct answer indicates that the reduction gearbox in the T-6 aircraft reduces the engine output from 30,000 RPM. In the context of turboprop engines, it's important for the reduction gearbox to decrease the high rotational speed of the engine to a more manageable level suitable for the propeller. This is essential for efficient operation, as the propeller operates at a significantly lower RPM than the engine itself.

Understanding the engine's output RPM is crucial for pilots and maintenance personnel as it impacts the aircraft's performance, fuel efficiency, and the wear on engine components. The specific RPM that the gearbox reduces from is a key specification for the aircraft's propulsion system, ensuring that the propeller operates effectively within its design parameters.