"Well, they'd probably be more quiet, Petike." some of you might say. :p
More seriously, I've been wondering about this question for an aeronautic-themed story I've been writing.
Its setting is a largelly realistic alternate world with pre-WWI and early WWI style aviation.
For the sake of...
aircraft
alternate tech sounds
alternate technology
aviation
early 20th century
early aviation
electric aeroplanes
electricengines
electropunk
thought experiment