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M114-ARV Armored Fighting Vehicle

The M114 was a lightweight, low-silhouette vehicle, designed to complement the M113 in command and reconnaissance roles. The M114 was 4 inches lower than the M113, and its upper forward glacis plate had a shallower angle than on the M113, resulting in a somewhat sleeker profile. It was constructed of aluminum and weighed 13,100 lb (5.94 metric tons) empty, with a combat weight of 15,093 lb (6.846 metric tons). It was powered by a Chevrolet V-8 engine with a 283 cubic inch (4.6 liters) displacement. The engine was rated at 160 horsepower. It had a three-man crew, and a top speed of 36 mph (58 km/h). It could swim, propelled by its tracks, and was light enough to be transported by cargo aircraft and dropped by parachute.

In October 1961 the Army awarded General Motors Corporation two contracts totaling $14.9 million for the production of 1,215 T114s.[1]

The original M114 required the commander's cupola hatch be opened to fire the .50 caliber machine gun, which rotated along with the hatch to allow aim in any direction. The updated M114A1 allowed the firing of the machine gun from the inside, utilizing manual traverse and elevating mechanisms. The M114A2 (aka M114A1E1) had a hydraulically powered cupola and mounted the M139 20mm cannon with greatly improved firepower. The observer in the rear had an M60 7.62mm machine gun mounted on a pedestal. There was stowage on the rear door for three M72A1 "LAW" anti-tank rockets.
thanks to ZE for the engine controller