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  2. Orifice plate - Wikipedia

    en.wikipedia.org/wiki/Orifice_plate

    Orifice plate showing vena contracta. An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orifice, its pressure builds up slightly upstream of the orifice [1] but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases.

  3. Area 51 - Wikipedia

    en.wikipedia.org/wiki/Area_51

    The CIA asked the AEC to acquire the land, designated "Area 51" on the map, and to add it to the Nevada Test Site. [ 9 ] : 56–57 Johnson named the area "Paradise Ranch" to encourage workers to move to "the new facility in the middle of nowhere", as the CIA later described it, and the name became shortened to "the Ranch".

  4. Flow measurement - Wikipedia

    en.wikipedia.org/wiki/Flow_measurement

    An orifice plate is a plate with a hole through it, placed perpendicular to the flow; it constricts the flow, and measuring the pressure differential across the constriction gives the flow rate. It is basically a crude form of Venturi meter, but with higher energy losses. There are three type of orifice: concentric, eccentric, and segmental. [7 ...

  5. Sperry Corporation - Wikipedia

    en.wikipedia.org/wiki/Sperry_Corporation

    Sperry also was the creator of the Ball Turret Gun mounted under the Boeing B-17 Flying Fortress and the Consolidated B-24 Liberator. In 1944, Sperry sold the Brooklyn factory at 40 Flatbush Avenue Extension to the Howard clothing manufacturing company, which already had a smaller nearby factory.

  6. History of cannons - Wikipedia

    en.wikipedia.org/wiki/History_of_cannons

    When referring to cannons, the term gun is often used incorrectly. In military usage, a gun is a cannon with a high muzzle velocity and comparatively flat trajectory, [146] as opposed to other types of artillery, such as howitzers or mortars, which have lower muzzle velocities, and usually fire indirectly. [147] [148]

  7. Oerlikon 20 mm cannon - Wikipedia

    en.wikipedia.org/wiki/Oerlikon_20_mm_cannon

    The gun produced to this design after the close of hostilities of WW2, and was called the 5TG, [12] and shortly thereafter, the KAB. [14] It was the first Oerlikon gun design that differed radically from the original Becker design. [13] Shortly after the War, Oerlikon began development of another gas-operated autocannon, 204-Gk, presently KAA. [14]

  8. QF 6-pounder Hotchkiss - Wikipedia

    en.wikipedia.org/wiki/QF_6-pounder_Hotchkiss

    The Ordnance QF Hotchkiss 6 pounder gun Mk I and Mk II or QF 6 pounder 8 cwt were a family of long-lived light 57 mm naval guns introduced in 1885 to defend against new, small and fast vessels such as torpedo boats and later submarines. Many variants were produced, often under license, which ranged in length from 40 to 58 calibres, with 40 ...

  9. M1857 12-pounder Napoleon - Wikipedia

    en.wikipedia.org/wiki/M1857_12-pounder_Napoleon

    In the period before the Civil War, a U.S. Army light artillery battery was organized with four M1841 6-pounder field guns and two M1841 12-pounder howitzers. [1] The field gun fired solid iron cannon balls in a flat trajectory to smash its targets [2] while the howitzer was designed to lob hollow shells into massed formations or fortifications. [3]