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To: Truth29
768 = speed of sound at sea level in dry air at 20°C. 768 x 5 = 3840 mph!.................. But at 11,000 − 20,000 m (Cruising altitude of commercial jets,and first supersonic flight)and −57 °C (−70 °F), the speed of sound drops to 660 mph, X5 = 3300mph!.........
17 posted on 06/30/2015 2:11:49 PM PDT by Red Badger (Man builds a ship in a bottle. God builds a universe in the palm of His hand.............)
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To: Red Badger

Yes, I know Mach 5 is faster, but I was thinking if we have gone from 2200 mph nearly 50 years ago to potential 3300 mph near future, that is not as impressive as it first sounds.


50 posted on 06/30/2015 2:59:17 PM PDT by Truth29
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