In the mid-1950s modern helicopter development was in its early years, and was full of innovative design ideas. The technology, less than two decades old, was in the capable hands of eminent engineers such as Igor Sikorsky, Frank Piasecki, and Stanley Hiller Jr., and the ideas for the future seemed unlimited. From this era of aviation innovation came the U.S. Navy’s first mass-produced unmanned aerial vehicle (UAV), the QH-50 Drone Antisubmarine Helicopter, or DASH.

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