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  2. Bell X-2 - Wikipedia

    en.wikipedia.org/wiki/Bell_X-2

    The Bell X-2 (nicknamed "Starbuster") was an X-plane research aircraft built to investigate flight characteristics in the Mach 23 range. The X-2 was a rocket-powered, swept-wing research aircraft developed jointly in 1945 by Bell Aircraft Corporation, the United States Air Force and the National Advisory Committee for Aeronautics (NACA) to explore aerodynamic problems of supersonic flight ...

  3. RTX Corporation - Wikipedia

    en.wikipedia.org/wiki/RTX_Corporation

    RTX Corporation. RTX Corporation, formerly Raytheon Technologies Corporation, [3] [4] is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitalization, as well as one of the largest providers of ...

  4. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    Name Symbol Decimal expansion Formula Year Set One: 1 1 Prehistory Two: 2 2 Prehistory One half: 1/2 0.5 Prehistory Pi: 3.14159 26535 89793 23846 : Ratio of a circle's circumference to its diameter.

  5. List of X-2 flights - Wikipedia

    en.wikipedia.org/wiki/List_of_X-2_flights

    X-2 #17: August 3, 1956 Iven Kincheloe 46-674 USAF 15 2.5+ 26,764 Tenth powered flight. High altitude flight. X-2 #18: August 8, 1956 Iven Kincheloe 46-674 USAF 16 ?

  6. North American X-15 - Wikipedia

    en.wikipedia.org/wiki/North_American_X-15

    United States Air Force NASA. Number built. 3. The North American X-15 is a hypersonic rocket-powered aircraft operated by the United States Air Force and the National Aeronautics and Space Administration (NASA) as part of the X-plane series of experimental aircraft. The X-15 set speed and altitude records in the 1960s, crossing the edge of ...

  7. ‘X-Men’ Screenwriter ‘Really Happy’ That Alan ... - AOL

    www.aol.com/x-men-screenwriter-really-happy...

    X-Men” screenwriter David Hayter recently told TMZ that he is thrilled by Alan Cumming’s recent revelation that the 2003 sequel “X2: X-Men United” is the “gayest film” the actor has ...

  8. 1 − 2 + 3 − 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%E2%88%92_2_%2B_3_%E2%88...

    The idea becomes clearer by considering the general series 1 − 2x + 3x 2 − 4x 3 + 5x 4 − 6x 5 + &c. that arises while expanding the expression 1 ⁄ (1+x) 2, which this series is indeed equal to after we set x = 1.

  9. 6 - Wikipedia

    en.wikipedia.org/wiki/6

    It is the first discrete biprime (2 × 3) which makes it the first member of the (2 × q) discrete biprime family, where q is a higher prime. All primes above 3 are of the form 6n ± 1 for n ≥ 1. As a perfect number: 6 is related to the Mersenne prime 3, since 2 1 (2 2 – 1) = 6. (The next perfect number is 28.)