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M1A1 Flamethrower
The M1 and M1A1 were portable flamethrowers developed by the United States of America during World War II. M1 weighed 72 lb, had a range of 15 meters, and had a fuel tank capacity of 5 gallons. The improved M1A1 weighed less at 65 lb, had a much longer range of 45 meters, had the same fuel tank capacity, and fired thickened fuel (napalm).
Development of the weapon began in July 1940. The first prototype had the designation of E1. The prototype was further refined into the E1R1 model, which resulted in the adopted M1 model in August 1941. These man-portable weapons saw little use in Europe. They were more common in the Pacific, where they were used extensively when attacking pillboxes and fortifications. The M1's unreliability and lack of developed tactics resulted in the failure of the first flamethrower attack on a Japanese fortification in December 1942. The M1 was gradually replaced by the M1A1 in 1943. The M1A1 was replaced by the M2 flamethrower later during the war.
==Configuration==
The M1A1 had a backpack configuration with a fuel tank that consisted of two upright bottles. A third, smaller upright bottle, the propellant tank, was located between the fuel tanks. The backpack had a high-pressure valve. The nozzle of the weapon was located at the end of a long, thin pipe, which was connected to the backpack via a hose. The pipe was slightly bent at the nozzle end. The nozzle had a hydrogen-powered ignitor. The long and thin cylindrical hydrogen tank was attached parallel to the pipe. A battery provided the spark needed to ignite the hydrogen. The hydrogen flame then ignited the fuel, which was forced out of the fuel tank through the hose and out of the nozzle by the propellant pressure when a valve was opened. The valve lever was located at the other end of the pipe, at the junction of the hose and the pipe.
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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