By how much does the torque drop for every 10,000 feet in altitude?

The torque drop of 4.5 PSI for every 10,000 feet in altitude is associated with the performance characteristics of the Pilatus PC-12 NG's engine. As altitude increases, the air density decreases, which impacts engine performance, particularly in terms of power output and torque. The torque reduction is a result of how the engine's ability to produce power diminishes in less dense air, necessitating adjustments in the flight operation and engine management to maintain optimal performance.

Understanding this torque drop is crucial for pilots operating at varying altitudes, as it directly influences climb performance, cruise configurations, and overall handling. This knowledge ensures that pilots can make informed decisions regarding power settings and performance expectations at higher altitudes, ultimately enhancing safety and efficiency during flight operations.