The M163 Vulcan Air Defence System consists of a 20mm M61 Vulcan Cannon mounted on an M113APC chassis in addition to an AN/VPS-2 rangefinding radar and an optical lead-calculating sight. It is a self-propelled anti-aircraft gun (SPAAG) with a 6000 rounds-per-minute rate of fire. Mounted Vulcan The 20mm M61 Vulcan is a hydraulically driven, six-barreled, air-cooled, electrically fired gatling gun with an extremely high rate of fire. ... The M113 during the Vietnam War The M113 is an armored personnel carrier family. ... APC is an abbreviation of: A Perfect Circle, a rock band with frontman Maynard James Keenan. ... American troops man an anti-aircraft gun near the Algerian coastline in 1943 Anti-aircraft, or air defense, is any method of combating military aircraft from the ground. ...
The M741 was similar to the M113A1, except that the M741 was equipped with an hydraulic suspension lock-out system to stabilize the M163 when firing.
Since the M163 weighed so much more than the M113APC, flotation cells were fitted to the sides of the vehicle, and a high-displacement trim vane was added to the front.
When the powertrain modifications of the M113A2 APC were introduced to the M163, the carrier vehicle was redesignated as M741A1.
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