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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.
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.
Ordnance ML 4.2 inch Mortar United Kingdom: World War II, Korea 107: 4.2-inch mortars M2 and M30 United States: World War II, Korea, Vietnam 140: 14 cm Minenwerfer M 15 Austria-Hungary: World War I 148: Coehorn mortar M. 1841 United States: 1841 150: Mortier de 150 mm T Mle 1917 Fabry France: World War I 152: Newton 6 inch Mortar United Kingdom ...
4.2-inch mortar may refer to: UK. ML 4.2-inch mortar – also known as SB 4.2 inch; US. M2 4.2-inch mortar; M30 mortar This page was last edited on 30 ...
In the United States, Canada, and Mexico, ring sizes are specified using a numerical scale with 1⁄4 steps, where whole sizes differ by 0.032 inches (0.81 mm) of internal diameter, equivalent to 0.1005 inches (2.55 mm) of internal circumference. The relationship of this size ( ) to ISO 8653:2016 circumference ( ) is , while the relationship to ...
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 ...
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]