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Glass chart. A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
The predicted impact point (PIP) is the location that a ballistic projectile (e.g. bomb, missile, bullet) is expected to strike if fired. The PIP is almost always actively determined by a targeting computer, which then projects a PIP marker (a "pipper") onto a head-up display (HUD). Modern HUDs are focused so the weapon operator will see the ...
By default, the output value is rounded to adjust its precision to match that of the input. An input such as 1234 is interpreted as 1234 ± 0.5, while 1200 is interpreted as 1200 ± 50, and the output value is displayed accordingly, taking into account the scale factor used in the conversion.
C.I.P. uses a drilled case to expose the pressure transducer directly to propellant gases. The piezo measuring device (transducer) is positioned at a distance of 25 millimetres (0.98 in) from the breech face when the length of the cartridge case permits that, including limits.
Ordnance QF 1-pounder "pom pom" Infantry gun/AA gun 37 mm 1.457 inch Ordnance QF 2-pounder: Anti-tank gun 40 mm 1.575 inch Ordnance QF 2-pounder "pom pom" Anti-aircraft gun 40 mm 1.575 Ordnance QF 3-pounder Vickers: Naval gun 47 mm 1.85 inch Ordnance QF 6-pounder: Anti-tank gun 57 mm 2.244 inch Ordnance BL 10-pounder Mountain gun: Mountain gun ...
The Browning automatic rifle (BAR) is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. . The primary variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge and designed by John Browning in 1917 for the American Expeditionary Forces in Europe as a replacement for the ...
These M60A1 RISE PIP conversion programs were concluded in 1990s. [ 95 ] Italy, Austria, Greece, Morocco, Taiwan, and other countries upgraded their existing fleets with various E60B component upgrades under several FMS defense contracts with Raytheon and General Dynamics during the mid to late 1980s. [ 88 ]
The cross-section is slightly more than a semi-circle so that the bottom of the hut curves inwards slightly. The exterior is formed from curved corrugated steel sheets 10 feet 6 inches (320 cm) by 2 feet 2 inches (66 cm), laid with a two-corrugation lap at the side and a 6-inch (15 cm) overlap at the ends. Three sheets cover the arc of the hut.