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AH-1 Cobra
It soon became clear
that the unarmed UH-1 troop helicopters were
not able to make opposed troop drops in the
landing zones, but that heavy firepower would
be needed to clear the Viet Cong and NVA troops
out of the way. By
1962 a small number of armed HU-1As (UH-1As)
were escorting H-21 (CH-21) troop transports
in and out of the landing zones, but the strict
rules of engagement at the time prevented
the gunships from operating effectively, as
they could not fire until fired upon.
In December 1962 Bell
had initiated a private venture purpose-built
gunship to US forces in Vietnam. The role
of this new helicopter was to protect the
troopships and to wield a full combat capability
of its own. Bell's first design was built
around a modified Model 47, leading to the
sleek Model 207 Sioux Scout which first flew
in July 1963.
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