How many power turbines does the PT6E-67XP have?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Power turbines are the stages that extract energy from the hot gas to drive the propeller via the reduction gearbox. The PT6E-67XP uses two power turbines in its power section. This dual-turbine arrangement increases the energy available to the propeller, giving stronger torque at takeoff and more responsive throttle control across the operating range, while the gas generator turbine handles sustaining the compressor and combustion process. In this engine, the two power turbines work together to turn the output shaft that drives the propeller, so the correct count is two.