The
Sikorsky UH-60 Black Hawk is a four-bladed, twin-engine, medium-lift
utility helicopter manufactured by
Sikorsky Aircraft. Sikorsky submitted the S-70 design for the
United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972. The Army designated the prototype as the
YUH-60A and selected the Black Hawk as the winner of the program in 1976, after a fly-off competition with the
Boeing Vertol YUH-61.