Auxiliary power units (APUs) are small engines that provide power to aircraft systems when the main engines are not running. They are typically used for starting the main engines, providing electrical power, and air conditioning. APUs can be either gas turbine or diesel powered.
The fuel consumption of an APU varies depending on the type of engine, the power output, and the operating conditions. However, as a general rule, gas turbine APUs consume more fuel than diesel APUs.
Here are some examples of APU fuel consumption rates:
* A Honeywell GTCP36-150 gas turbine APU consumes approximately 100 pounds of fuel per hour at full power.
* A Honeywell RE220 diesel APU consumes approximately 50 pounds of fuel per hour at full power.
* A Pratt & Whitney Canada PW900 gas turbine APU consumes approximately 150 pounds of fuel per hour at full power.
APUs are essential for the safe operation of aircraft. They provide a reliable source of power for starting the main engines and other critical systems. However, their fuel consumption can be a significant cost for airlines.
