In article ,
Adder wrote:

Transformers
can be made much more efficient at the higher frequencies. It's probably
the reason why aircraft power runs at higher than ordinary mains
frequency.

I heard that Tesla wanted mains frequencies to be around 300-400Hz for
this reason. I think the engineers who built the early power plants
(Edison?) felt this was impractical because they couldn't build big AC
generators that could spin that fast.

Wonder how things would be different if the situation could be revisited
today...