3 ms·
The engines are loud but the prop noise is the really noisy part.. In that regard it doesn't matter the power source, if you've been near Phantoms or any other
by mikeyouse 11y ago
The engines are loud but the prop noise is the really noisy part.. In that regard it doesn't matter the power source, if you've been near Phantoms or any other 'drones' you've heard how obnoxious they can be.
- the8472 11y agoit would still eliminate the pollution aspect. also, aren't drones generally higher-pitched than regular helis? as far as I know higher frequencies are more strongly attenuated by air.