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CaldwellMG
Caldwell machine gun
Country of origin

Australia

Production began

1915

Weapon type

Hand-cranked heavy machine gun

Caliber

.303 British

Weight

38 pounds (17 kilograms)

Magazine/Cylinder capacity

Two 104-round pan magazines (total 208 rounds)

Cyclic rate

Variable, reported to be 500 RPM

Maximum effective range

1,000 metres (3,300 feet; 1,100 yards)

The Caldwell machine gun is a hand-cranked water-cooled machine gun of Australian origin. [1][2][3][4][5]

History

Designed by Thomas Frederic Caldwell of Melbourne, Australia, who moved to the United Kingdom to bring his invention to the attention of the British Government. It was lighter than its contemporary, the Maxim gun, and was also said to be cheaper to build and produce and was even said to be "foolproof". It is unclear whether any were produced, or if it advanced past prototype stages.

Overview

This two-barreled crank-operated machine gun looks similar to the Maxim gun, but includes a steam valve. The two barrels can fire either simultaneously or separately, with a variable rate of fire dependent on how fast the crank is operated, à la gatling guns of the time.

References

  1. CALDWELL MACHINE GUN CO. The Argus, Saturday 20 March 1915, Page 21
  2. CALDWELL MACHINE GUN. Poverty Bay Herald, Volume XLII, Issue 13645, 27 March 1915, Page 4
  3. http://paperspast.natlib.govt.nz/cgi-bin/paperspast?a=d&d=PBH19150327.2.24.2
  4. http://www.freepatentsonline.com/1090124.pdf
  5. http://www.ibiblio.org/hyperwar/USN/ref/MG/I/MG-A.html