The UH-60 Black Hawk is a four-bladed, twin-engine, medium-lift utility helicopter

Utility helicopter

A Utility Helicopter is a multi-purpose helicopter. A utility military helicopter can fill roles such as ground attack, air assault, cargo, surveillance and troop transport. Their size is generally between cargo helicopters and light observation helicopters....

 manufactured by Sikorsky Aircraft

Sikorsky Aircraft

The Sikorsky Aircraft Corporation is an American aircraft manufacturer based in Stratford, Connecticut. Its parent company is United Technologies Corporation.-History:...

. Sikorsky submitted the S-70 design for the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

'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

Boeing Vertol YUH-61

|-See also:-References:Bibliography*Leoni, Ray D. Black Hawk, The Story of a World Class Helicopter. American Institute of Aeronautics and Astronautics, 2007. ISBN 978-1-56347-918-2.-External links:*—YUH-61 origins...

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The UH-60A entered service with the Army in 1979, to replace the Bell UH-1 Iroquois as the Army's tactical transport helicopter.