M42 Duster
After the Korean War, the US Army made the decision to retire the M24 Chaffee light tank, as it was considered obsolete, and replace it with the M41 Walker Bulldog. To preserve commonality of parts, all vehicles based on the M24 chassis were also retired, to be replaced by those based on the M41. The M19 antiaircraft vehicle was based on the M24, but it was a simple expedient to take the M19's turret and place it on a M41 chassis. The result was the M42, nicknamed "Duster" by its crews for what it would reduce targets to.
The M42, like the M19 before it, was equipped with twin Bofors 40mm cannon, which were devastating to low-flying aircraft. However, this was only true for propeller aircraft or helicopters, as the Duster lacked any sort of radar tracking system and could engage visually; against a jet fighter, the Duster fired too slowly, assuming the crew could find the range. It was also an open-topped design, vulnerable to weather, radiation on a nuclear battlefield, and enemy infantry. As a result, by 1960, the US Army mostly retired the Duster in favor of missile systems.
When the US became involved in the Vietnam War, the Army rethought its decision: the North Vietnamese were known to use Antonov An-2 biplanes as bombers. While unlikely that the North Vietnamese would be able to bomb airfields and firebases in South Vietnam, the Korean War had taught the US Army the lesson that aerial harassment was an effective tactic. As a result, many M42s were returned to service and deployed to Vietnam. Though the aerial threat never materialized, it was already known (with the M19 in Korea) that twin 40mm were devastating to infantry as well as aircraft. Dusters then served to protect bases from North Vietnamese and Viet Cong attacks. Though not as effective in the jungle (due to the vegetation tending to detonate the 40mm shells before they hit their targets), in clear fields of fire--such as those surrounding firebases--the M42 was deadly. It would serve to the end of the Vietnam War.
After Vietnam, the M42 was retired from US Army service in favor of the M163 Vulcan Air Defense System, but others would remain in the service of friendly nations into the 21st Century.
Dad had built a M42 in the early 1970s as part of his Vietnam collection, but went back to rebuild it 30 years later to make it more accurate. This involved cutting off the flash suppressors on the 40mm barrels (the suppressors were not used widely in Vietnam) and adding two M60 light machine guns--a common field modification to defend against swarming enemy infantry. Dad added some fire extinguishers, field packs, and C-ration boxes as well. The result was a nice rebuild of an old kit.
M42 Duster
After the Korean War, the US Army made the decision to retire the M24 Chaffee light tank, as it was considered obsolete, and replace it with the M41 Walker Bulldog. To preserve commonality of parts, all vehicles based on the M24 chassis were also retired, to be replaced by those based on the M41. The M19 antiaircraft vehicle was based on the M24, but it was a simple expedient to take the M19's turret and place it on a M41 chassis. The result was the M42, nicknamed "Duster" by its crews for what it would reduce targets to.
The M42, like the M19 before it, was equipped with twin Bofors 40mm cannon, which were devastating to low-flying aircraft. However, this was only true for propeller aircraft or helicopters, as the Duster lacked any sort of radar tracking system and could engage visually; against a jet fighter, the Duster fired too slowly, assuming the crew could find the range. It was also an open-topped design, vulnerable to weather, radiation on a nuclear battlefield, and enemy infantry. As a result, by 1960, the US Army mostly retired the Duster in favor of missile systems.
When the US became involved in the Vietnam War, the Army rethought its decision: the North Vietnamese were known to use Antonov An-2 biplanes as bombers. While unlikely that the North Vietnamese would be able to bomb airfields and firebases in South Vietnam, the Korean War had taught the US Army the lesson that aerial harassment was an effective tactic. As a result, many M42s were returned to service and deployed to Vietnam. Though the aerial threat never materialized, it was already known (with the M19 in Korea) that twin 40mm were devastating to infantry as well as aircraft. Dusters then served to protect bases from North Vietnamese and Viet Cong attacks. Though not as effective in the jungle (due to the vegetation tending to detonate the 40mm shells before they hit their targets), in clear fields of fire--such as those surrounding firebases--the M42 was deadly. It would serve to the end of the Vietnam War.
After Vietnam, the M42 was retired from US Army service in favor of the M163 Vulcan Air Defense System, but others would remain in the service of friendly nations into the 21st Century.
Dad had built a M42 in the early 1970s as part of his Vietnam collection, but went back to rebuild it 30 years later to make it more accurate. This involved cutting off the flash suppressors on the 40mm barrels (the suppressors were not used widely in Vietnam) and adding two M60 light machine guns--a common field modification to defend against swarming enemy infantry. Dad added some fire extinguishers, field packs, and C-ration boxes as well. The result was a nice rebuild of an old kit.