 Although it had what had become by then the typical configuration for a helicopter gunship, with a sharklike fuselage, tandem crew seating, and stub wings for armament, the YAH-63 was largely a new machine.Distinctive features included wheeled tricycle landing gear, flat canopy window plates, an unusual "tee" tail, a large ventral fin, and a three-barreled General Electric XM-188 cannon.The YAH-63's rotor mast could be lowered and the landing gear could kneel to reduce its height for transport.