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The 4.2 in (110 mm) mortar was a smooth-bore weapon of the Stokes pattern and was designed by the Armaments Research and Development Establishment and produced by the Royal Ordnance Factories. [5] It entered widespread British service in 1942, equipping chemical warfare companies of the Royal Engineers (RE). The Mark 3 became the standard model.
A 4.2-inch mortar in Korea, 1952. The M2 4.2-inch mortar was a U.S. rifled 4.2-inch (107 mm) mortar used during the Second World War, the Korean War, and the Vietnam War. It entered service in 1943. It was nicknamed the "Goon Gun" (from its large bullet-shaped shells, monopod, and rifled bore) or the "Four-Deuce" (from its bore size in inches).
Rate of fire. 18 rpm max., 3 rpm sustained. Effective firing range. 770 m to 6,840 m. (840 yd to 7,480 yd) Maximum firing range. 6,840 m (7,480 yd) The M30 106.7 mm (4.2 inch, or "Four-deuce") heavy mortar is an American rifled, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to infantry units.
A less precise definition is one pica equals 0.166 inches (4.2 mm), and one point 0.01383 inches (0.351 mm). [27] [33] It was also noticed that 83 picas is nearly equal to 35 cm, so the Type Founders Association also suggested using a 35 cm metal rod for measurements, but this was not accepted by every foundry. [27]
Postwar, the two-inch mortar was kept in service to fire smoke and illuminating rounds. It was replaced by the Royal Ordnance 51 mm infantry mortar [4] in the late 1980s. Specifications. Calibre: 2 inches (50.8 mm) Length: 21 inches (53 cm) Weight: 10 + 1 ⁄ 2 pounds (4.8 kg) Firing mechanism: Trip (small trigger) Elevation: 45-90° Range: 500 ...
Feed system. manual. The Soltam K6 is a 120 mm (4.75 inch) mortar that was developed by Soltam Systems of Israel. It is the long-range version of the Soltam K5 [1] and has replaced older systems, such as the 107-millimetre (4.2 in) M30, in several armies, including the United States Army. It is much lighter than the M30, has a greater range ...
Thickness of aluminum foil is measured in mils (1 ⁄ 1000 inch, or 0.0254 mm) in the United States. Cross-sectional area of electrical wire is measured in circular mils in the U.S. and Canada, one circular mil (cmil) being equal to 5.067 × 10 −4 mm 2 (or 7.854 × 10 −7 in 2). Since this is so small, actual wire is commonly measured in ...
1 / 36 yd or 1 / 12 ft. Metric (SI) units. 25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1 36 yard or 1 12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is ...