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  2. NASA X-43 - Wikipedia

    en.wikipedia.org/wiki/NASA_X-43

    The Pegasus rocket booster separated from its B-52 carrier at 40,000 feet and its solid rocket took the combination to Mach 10 at 110,000 feet. [9] The X-43A split away at Mach 9.8 and the engine was started at Mach 9.65 for 10–12 seconds with thrust approximately equal to drag, and then glided to the Pacific Ocean after 14 minutes. [9]

  3. Flight airspeed record - Wikipedia

    en.wikipedia.org/wiki/Flight_airspeed_record

    The fastest unmanned (but capable of carrying up to 8-10 people) spaceplane ever built [citation needed], weighing 100 tons or more. Flying between any two airports allow a large number of combinations , so setting a speed record ("speed over a recognised course") is fairly easy with an ordinary aircraft , although there are many administrative ...

  4. Hypersonic speed - Wikipedia

    en.wikipedia.org/wiki/Hypersonic_speed

    The subsonic speed range is that range of speeds within which, all of the airflow over an aircraft is less than Mach 1. The critical Mach number (Mcrit) is lowest free stream Mach number at which airflow over any part of the aircraft first reaches Mach 1. So the subsonic speed range includes all speeds that are less than Mcrit.

  5. Orion Griffin: Today in history: The fastest man alive - AOL

    www.aol.com/orion-griffin-today-history-fastest...

    He was the fastest flying man alive and would hold the record until 1961, when the X-15 reached four times the speed of sound (Mach 4). Having been flown 12 times before Apt's flight, it was known ...

  6. Boom: America’s answer to Concorde completes its first ...

    www.aol.com/boom-america-answer-concorde...

    The fastest speed the XB-1 had reached prior to the January 28 flight was Mach 0.95, just below the supersonic threshold of Mach 1, which it hit during its last test flight on January 10.

  7. Fastest propeller-driven aircraft - Wikipedia

    en.wikipedia.org/wiki/Fastest_propeller-driven...

    This unusual aircraft was intended to explore the use of propellers in high-speed flight and, when operating in conjunction with the turbojet engines, has achieved speeds of approximately Mach 0.90 in level flight. In a dive, it has achieved supersonic speeds, up to slightly above Mach 1. [10]

  8. Supersonic jets are making a comeback. Here’s what that means ...

    www.aol.com/news/supersonic-jets-making-comeback...

    The Mach number is defined as a plane’s speed divided by the speed that sound waves move through the air. To “break the sound barrier” means to fly faster than the speed of sound, with Mach ...

  9. Hypersonic flight - Wikipedia

    en.wikipedia.org/wiki/Hypersonic_flight

    The first manufactured object to achieve hypersonic flight was the two-stage Bumper rocket, consisting of a WAC Corporal second stage set on top of a V-2 first stage. In February 1949, at White Sands, the rocket reached a speed of 8,290 km/h (5,150 mph), or about Mach 6.7. [2]