|The following is based on Fallout Tactics and some details might contradict canon.|
The helicopter is a non-driveable vehicle in Fallout Tactics.
A military helicopter powered by a single, turboshaft engine, with a two-bladed main rotor and tail rotor. It was used before the war by the military until fuel concerns led to all aircraft of this type to be grounded. Its technical specs and shown picture suggest that the helicopter type is UH-1 Iroquois, primarily used by US army in the past.
Helicopter appears only in Fallout Tactics.