Quote:
drone speed
Our vehicles are at super-critical Reynolds number by 20-mph ( 32.2-km/h ). That's all a drone would have to do in order to 'observe' tufts or smoke.
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I was somewhat surprised that the fastest [hobbyist] drone currently did 247MPH. How I Built the FASTEST Drone on Earth
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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