Hughes XH-17
AMERICAN TWIN-ENGINE HEAVY LIFT HELICOPTER PROTOTYPE
Hellett XH-17; H-17 Sky Crane; XH-17; Flying Crane; XH-28; Hughes H-17; Hughes H-28; Hughes R-17
The Hughes XH-17 "Flying Crane" was the first helicopter project for the helicopter division of Hughes Aircraft Company. The XH-17, which had a two-bladed main rotor system with a diameter of 134 feet (41 m), still holds the world record for flying with the largest rotor system.