eh, i fly one for fun and they really are quite loud. maybe the area has multiple flying at once and they didn’t notice just how close the sound was (somehow)
propellers are just loud. magic secret inventions won’t change that much (recently there was a company that claimed to have silent propellers, the hobby fpv drone community tried to replicate what they showed but didnt get anywhere)
I think it’s just hard to maintain constant awareness in war
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