Sikorsky submitted a 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.
Major variants include the Navy's SH-60 Seahawk, the Air Force's HH-60 Pave Hawk, the Coast Guard's MH-60 Jayhawk and the civilian S-70.
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).
Based on experience in Vietnam, the Army required significant performance, survivability and reliability improvements from both UTTAS and the new powerplant.
[4] The UTTAS requirements for improved reliability, survivability and lower life-cycle costs resulted in features such as dual-engines with improved hot and high altitude performance, and a modular design (reduced maintenance footprint); run-dry gearboxes; ballistically tolerant, redundant subsystems (hydraulic, electrical and flight controls); crashworthy crew (armored) and troop seats; dual-stage oleo main landing gear; ballistically tolerant, crashworthy main structure; quieter, more robust main and tail rotor systems; and a ballistically tolerant, crashworthy fuel system.
Prior to the delivery of the prototypes to the US Army, a preliminary evaluation was conducted in November 1975 to ensure the aircraft could be operated safely during all testing.
[16] Following their use in the operation to kill Osama bin Laden in May 2011, it emerged that the 160th SOAR used a secret version of the UH-60 modified with low-observable technology which enabled it to evade Pakistani radar.
The aircraft appeared to include features like special high-tech materials, harsh angles, and flat surfaces found only in stealth jets.
[20] In September 2012, Sikorsky was awarded a Combat Tempered Platform Demonstration (CTPD) contract to further improve the Black Hawk's durability and survivability.
The company 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 they are to transition them to the helicopter.
[21][22] In December 2014, the 101st Airborne Division began testing new resupply equipment called the Enhanced Speed Bag System (ESBS).
However, all systems were ad hoc with bags not made to keep objects secure from impacts, so up to half of the airdropped items would be damaged upon hitting the ground.
The system includes a hands-free reusable linear brake and expendable speed line and a multipurpose cargo bag.
Since supplies can be delivered more accurately and the system can be automatically released on its own, the ESBS can enable autonomous resupply from unmanned helicopters.
[14] The Black Hawk helicopter series can perform a wide array of missions, including the tactical transport of troops, electronic warfare, and aeromedical evacuation.
[citation needed] In air assault operations, it can move a squad of 11 combat troops or reposition a 105 mm M119 howitzer with 30 rounds ammunition and a four-man crew in a single lift.
[40] In January 2014, the Army began retiring the fleet of 34 Black Hawks from service (five had been lost in accidents) and had planned for this to be completed by June 2018.
At the end of this testing, the People's Liberation Army purchased 24 S-70C-2s, equipped with more powerful GE T700-701A engines for improved high-altitude performance.
[52][53] The Colombian Army became the first worldwide operator of the S-70i with Terrain Awareness and Warning Capability (HTAWS) after taking delivery of the first two units on 13 August 2013.
[67] On 22 February 2022, DND and PZL Mielec formally signed the US$624 million contract for 32 additional S-70i Black Hawks,[68] totalling to around 48 units ordered.
[98] In February 2023, Ukraine's Main Directorate of Intelligence (HUR) published a video showing them operating at least two UH-60s painted in Ukrainian colors.
[107] The U.S. Army has signalled its intent to eventually replace the UH-60, launching the Future Long-Range Assault Aircraft (FLRAA) program in 2019, with a new helicopter planned to enter service by 2030.
In December 2022 it was announced that the winning design was Bell’s tilt-rotor V-280 Valor,[110] with the US Army awarding an initial contract to develop a prototype by 2025.
[116] In June 2012, the U.S. Defense Security Cooperation Agency notified Congress that Qatar requested the purchase of twelve UH-60Ms, engines, and associated equipment.
[119] In October 2018, the US via Ambassador Robert Kohorst announced donation of two UH-60M helicopters with associated equipment and crew training to Croatia's Ministry of Defence, to be delivered in 2020.
[123][124] In January 2024, the State Department approved a possible Foreign Military Sale to Croatia for 8 UH-60M helicopters and related equipment and services for an estimated cost of $500 million.
[125] The U.S. government has provided $139.4 million in financial assistance for 51 percent of the funding, as a compensation for the Croatian donation of 14 Mi-8 helicopters to Ukraine.
[141] In August 2023, the Portuguese Air Force shared a photo on twitter of the first flight of one of the six UH-60s purchased from Arista Aviation Services.
[143] In December 2023, the Hellenic Army selected the UH-60Ms for a possible order of 35 aircraft and associated equipment for an estimated cost of $1.95 billion pending the deal clears Congress.