Heavy Machine Gun - History

History

In the late 19th century, Gatling guns and other externally-powered types such as the Nordenfelt were often made in a variety of calibers, such as 0.5-inch and 1-inch. Due to their multiple barrels, overheating was not so much of an issue, but they were also quite heavy.

When Maxim developed his recoil-powered machine gun using a single barrel, his first main design weighed a modest 26 pounds (11.8 kg) and fired a .45-inch rifle-caliber bullet from a 24-inch barrel. A famous photo of Maxim showed him picking it up by its 15-pound tripod (6.8 kg) with one arm. It was similar to present-day medium machine guns, but it could not be fired for extended periods due to overheating. As a result, Maxim created a water jacket cooling system to enable it to fire for extended periods. However, this added significant weight, as did the change to more powerful rifle cartridges.

There were thus two main types of heavy, rapid-fire weapons: the manually powered, multiple-barrel machine guns and the single-barrel Maxim guns. By the end of the 19th century, many new designs such as the M1895 Colt-Browning and Hotchkiss were developed, powered by gas operation or recoil operation. Also, rather than the heavy water jacket, new designs introduced other types of barrel cooling, such as barrel replacement, metal fins, heat sinks or some combination of these.

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