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  2. Reaction Engines LAPCAT A2 - Wikipedia

    en.wikipedia.org/wiki/Reaction_Engines_LAPCAT_A2

    The vehicle design was intended to have about 20,000 kilometres (11,000 nautical miles) range and good subsonic and supersonic speed fuel efficiency, thus avoiding the problems inherent in earlier supersonic aircraft. The top speed is projected to be Mach 5+.

  3. LAPCAT - Wikipedia

    en.wikipedia.org/wiki/LAPCAT

    The LAPCAT A2 concept in the upper atmosphere. One possible supersonic transport aircraft being researched as part of this project is the A2 by Reaction Engines Limited. [7] The researchers are looking at an aircraft capable of flying from Brussels (Belgium) to Sydney (Australia) in 2–4 hours, [8] significantly reducing journey times across ...

  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. Scramjet programs - Wikipedia

    en.wikipedia.org/wiki/Scramjet_programs

    The first free-flight of the X-51 took place in May 2010. On 1 May 2013, the X-51 performed its first fully successful flight test, flying for 240 seconds until running out of fuel; this test was the longest air-breathing hypersonic flight. This test signified the completion of the program. [5] [6]

  6. Russia and China have advanced hypersonic flight to the next level by developing weapons that not only fly fast but also at low altitudes. Russia and China are leading in hypersonic innovation ...

  7. 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]

  8. X-15 Flight 188 - Wikipedia

    en.wikipedia.org/wiki/X-15_Flight_188

    The dummy scramjet was fitted for speed testing, the goal was to have real flight test and compare this with the wind tunnel testing. The extreme heat at scramjet, over 2,700 °F (1,480 °C), burned a hole into the scramjet and then the top ventral fin.

  9. Does AT&T Pass Buffett's Test? - AOL

    www.aol.com/2011/12/04/does-att-pass-buffetts-test

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