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by dhsysusbsjsi
1397 days ago
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I did some quick googling to put things in perspective: Mach1 is ~ 0.3 km/s (+/- 0.1 varies with altitude)
Artillery is ~ 1 km/s
Earth orbital escape velocity is ~ 11 km/s 6km high is 20,000 ft, around low regional turboprop aircraft.
10km high is 32,000 ft, around airliner cruise altitude.
15km high is 50,000 ft, where Elon Musks private jet sits.
20km high is more where U2 and SR71 start to operate and require space suits. ISS orbit is ~ 400 km
Elon's Starlink is 550km |
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