120/208 3 phase 400 hz is standard aircraft power for most US made aircraft. Have worked on buildings that have motor generators to change the 60 hz to 400 hz to power the aircraft or associated equipment. Usually this is set up as a seperatly derived system but sometimes one 400 hz generator will feed more than 1 building.
And ya 400 hz bits worse than 60hz. [Linked Image]

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