One advantage of using AC electrical power in aircraft is that it allows for...

The use of AC electrical power in aircraft indeed offers substantial advantages, particularly in the context of stepping the voltage up or down. AC power is conducive to the use of transformers, which can efficiently change voltage levels. This capability is vital in aircraft systems, as it enables the adaptation of power supply requirements for various electrical components and systems.

Higher voltage levels can be transmitted over greater distances with reduced power loss due to lower current levels, which is particularly advantageous in the confined spaces of an aircraft. Conversely, when the voltage needs to be reduced for specific components, transformers facilitate this process smoothly. This flexibility in voltage management is critical for maintaining the overall efficiency and performance of an aircraft's electrical power system.

While AC motors indeed have the ability to reverse direction, this is a function of motor design rather than a direct benefit of AC power itself. Higher power output can also be achieved with both AC and DC systems, depending on the design and requirements of the aircraft. In terms of long cable lengths, both AC and DC systems can have significant challenges relating to voltage drop and power loss. Therefore, the ability to step voltage up or down efficiently sets AC systems apart as particularly advantageous in aircraft applications.