Which component reduces RPM from the power turbine?

Which component reduces RPM from the power turbine?

• A. Reduction Gearbox
• B. Accessory Gearbox
• C. N1 Gear Train
• D. Transmission Shaft

Answer: (A)

When a power turbine drives a load, its speed is typically much higher than what the connected device requires. A reduction gearbox is designed to lower that high RPM to a usable, slower speed while increasing torque, making it suitable for driving a generator, propeller, or other equipment. The gearbox does this through gear ratios, converting the fast, high-torque output of the turbine into a slower, high-torque output appropriate for the load. The transmission shaft simply passes power, and the N1 gear train or accessory gearbox may handle other functions, but the actual speed reduction from the power turbine is accomplished by the reduction gearbox.

When a power turbine drives a load, its speed is typically much higher than what the connected device requires. A reduction gearbox is designed to lower that high RPM to a usable, slower speed while increasing torque, making it suitable for driving a generator, propeller, or other equipment. The gearbox does this through gear ratios, converting the fast, high-torque output of the turbine into a slower, high-torque output appropriate for the load. The transmission shaft simply passes power, and the N1 gear train or accessory gearbox may handle other functions, but the actual speed reduction from the power turbine is accomplished by the reduction gearbox.