The Sikorsky UH-60 Black Hawk is a four-bladed, twin-engine, medium-lift utility helicopter manufactured by Sikorsky Aircraft submitted the S-70 design for the United States Army’s 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.  TheYUH-60A entered service with the U.S. Army in 1979, to replace the Bell UH 1 Iroquois  Bell UH-1 Iroquois as the Army’s tactical transport helicopter. This was followed by the fielding of electronic warfare and special operations variants of the Black Hawk. Improved UH-60L and UH-60M utility variants have also been developed. Modified versions have also been developed for the U.S. Navy, Air Force, and Coast Guard. In addition to U.S. Army use, the UH-60 family has been exported to several nations. Black Hawks have served in combat during conflicts in Grenada, Panama, Iraq, Somalia, the Balkans, Afghanistan, and other areas in the Middle East.

In the late 1960s, the United States Army began forming requirements for a helicopter to replace the UH-1 Iroquois, and designated the program as the Utility Tactical Transport Aircraft System (UTTAS). The Army also initiated the development of a new, common turbine engine for its helicopters that would become the General Electric T700. Based on experience in Vietnam, the Army required significant performance, survivability and reliability improvements from both UTTAS and the new power plant. The Army released its UTTAS request for proposals (RFP) in January 1972. The RFP also included air transport requirements. Transport aboard the C-130 limited the UTTAS cabin height and length.

In the 1 May 2011 operation that killed Osama bin Laden, it emerged that the 160th Special Operations Aviation Regiment, which operated the helicopters during the raid, used a highly modified version of the UH-60. Features apparently include a modified tail section with extra blades on the tail rotor and other additions which significantly reduced noise levels below that of conventional UH-60s. It also had low-observable technology similar to that of the F-117 that enabled it to evade Pakistan Air Force radars. The aircraft seemed to include features like special high-tech materials, harsh angles, and flat surfaces, found only on sophisticated stealth jets. This came to light only when one of the helicopters used in the operation crashed and was subsequently destroyed except for its tail section. Low observable versions of the Black Hawk have been studied as far back as the mid-1970s.

In September 2012, Sikorsky was awarded a Combat Tempered Platform Demonstration (CTPD) contract to further improve the Black Hawk’s durability and survivability. Sikorsky is to develop new technologies such as a zero-vibration system, adaptive flight control laws, advanced fire management, a more durable main rotor, full-spectrum crashworthiness, and damage tolerant airframe, then transition them to the helicopter. Improvements to the Black Hawk are to continue until the Future Vertical Lift program is ready to replace it.

Sikorsky UH-60 Black Hawk is planned to be delivered by the end of June to stay permanently at the National Navy SEAL Museum on A1A in Ft Pierce