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M15 Halftrack
The M15 Halftrack, officially designated M15 Combination Gun Motor Carriage, was a self-propelled anti-aircraft gun on a halftrack chassis used by the United States Army during World War II. It was equipped with one M1 automatic 37 millimeter (1.5 in) gun and two water-cooled 0.5 inch (12.7 mm) M2 Browning heavy machine guns. Based on the M3 Halftrack chassis, it was produced by the White Motor Company and Autocar between July 1942 and February 1944, and served alongside the M16 Multiple Gun Motor Carriage.
The M15 evolved from the T28 project, an outgrowth of the M2 Halftrack mounting a 37 millimeter (1.5 in) gun. Initially designated as the T28E1 Combination Gun Motor Carriage (CGMC), it was accepted into service in 1943 as the M15. While conceived as an anti-aircraft weapon, the U.S. Army armored units that received it during the latter stages of World War II often used its 37 mm gun as an infantry support weapon. The M15A1 was an improved variant with air-cooled machine guns mounted below the 37 mm gun. The M15 "Special" was an M15 which mounted a single Bofors 40 mm gun.
During World War II the vehicle served the U.S. Army throughout the Mediterranean, European, and Pacific Theaters of Operations. In the Korean War the M15 served alongside the M16 providing infantry support.
== Specifications ==
The M15 was based on the M3 Halftrack chassis, adding a coaxially mounted armament of a fully automatic and two superior placed .50 cal (12.7 mm) M2 Browning machine guns.〔 Manned by a crew of seven,〔Ness (2002), p. 206.〕 it was long, wide, high, and had a wheelbase of .〔Berndt (1993), p. 152.〕〔 The vehicle's armor was up to 12 mm thick and it weighed . The suspension was leaf spring on the front axle and vertical volute spring for the tracks. A 386-cubic inch (6.330 cc) White 160AX, 128 horsepower (95 kW) 6-cylinder gasoline engine gave the M15 a power-to-weight ratio of 15.8 horsepower per ton and a maximum road speed of .〔Hunnicutt (2001), p. 221.〕〔Berndt (1994), p. 34.〕〔Hogg & Weeks (1980), p. 94.〕 Its fuel tank provided a range of .〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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