The unmistakable sound of its main rotor blade was almost as distinct as its bulbous frame. Long before the Vietnam conflict had ended, the “Huey” (its original Army designation was HU-1A ...

meaning it could conceivably be placed on the Huey airframe. What’s more, the M102 was built for air-mobile operations, often tethered to the underside of the twin-rotor CH-47 Chinook or ...