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How fast is a jet plane?

Updated: 9/11/2023
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6y ago

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Commercial airlines cruise at approximately 500 - 600 mph. (804.672 kilometre/hour)

Additional InformationFighter jet aircraft fly at speeds in the low mach numbers. Mach one is roughly 750 miles per hour, give or take, and military jets can fly at well over a thousand miles per hour. Back in the day (July of 1976), the SR-71 set the jet speed record. Radar clocked the thing at 2242 mph. Oh, and the record still stands. This highly sensitive aircraft project probably holds back data that would top this figure, but the information won't be coming out soon if it exists. You want raw speed? The Blackbird is the answer to your prayers. Use the link and read about this amazing aircraft. The pics alone are worth the trip over to our friends at Wikipedia. As a caveat, there is a much faster jet called a scram jet, but it is unmanned. The NASA X-43A can hit Mach 9.6 which is about 7300 miles per hour. An Aussie scram jet hit Mach 10 (about 7600 mph), but it was upon re-entry after a test run, so it's kinda like gravity aided.

so it go 500 or 600 miles
It depends on the type of jet because some can go as fast as Mach 9.6(7000 miles per hour)(X-43) and others can go as slow as to hover(Harrier).
Modern jet aircraft fly so fast their airspeed is measured by Mach numbers which is the relation of the speed they are traveling at to the speed of sound. For example: An aircraft traveling at Mach 1 is flying the speed of sound, which at sea level is approximately 700 miles per hour. The speed of sound increases with altitude so you must travel faster at higher altitudes to reach the speed of sound. Modern jet fighter aircraft can travel in excess of Mach 2 or 1400 miles per hour. The SR 71 Blackbird spy plane (now retired from service) can travel in excess of Mach 3 or over 2100 miles per hour. (actual reported speeds in excess of 2500 miles per hour)

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