The Sikorsky S-70 is a medium transport/utility helicopter family manufactured by Sikorsky Aircraft. It was developed for the U.S. Army in the 1970s, winning a competition to be designated the UH-60 Black Hawk and spawning a large family in U.S. military service. New and improved versions of the UH-60 have been developed since. Civilian versions, and some military versions are produced under various S-70 model designations.
The S-70 family was developed to meet a US Army requirement to replace the UH-1 Iroquois family of utility medium-lift helicopters in 1972. Three YUH-60A prototypes were constructed, with the first flying in October 1974. They were evaluated against the Boeing-Vertol YUH-61A. The YUH-60A was selected for production, and entered service as the UH-60A Black Hawk with the US Army in 1979.
After entering service, the helicopter was modified for new missions and roles, including mine laying and medical evacuation. An EH-60 variant was developed to conduct electronic warfare and special operations aviation developed the MH-60 variant to support its missions. In the late 1980s the model was upgraded to the UH-60L, which featured more power and lift with the upgrade to the -701C model of the GE T700 engine. The improved UH-60M model was developed in the early 2000s. The UH-60M and its International version, the S-70i, include GPS navigation, a glass cockpit, an integrated Flight Management System, and a significant upgrade to the powertrain and rotor system adding both power and lift capability.
The S-70 can perform a wide array of missions, including air cavalry, electronic warfare, and aeromedical evacuation: several versions are used to transport the President of the United States, which while carrying the President is known as "Marine One". In air assault operations it can move a squad of 11 combat troops and equipment or carry the 105 mm M102 howitzer, thirty rounds of ammunition, and a six-man crew. Alternatively, it can carry Script error: No such module "convert". of cargo or sling load Script error: No such module "convert". of cargo. The S-70 is equipped with advanced avionics and electronics, such as the Global Positioning System.
The HH-60G Pave Hawk is a highly modified version of the S-70 primarily designed to recover downed aircrew or other isolated personnel during war and equipped with a rescue hoist with a Script error: No such module "convert". cable that has a Script error: No such module "convert". lift capability, and a retractable in-flight refueling probe. The United States Air Force received the MH-60G Pave Hawk in 1982.
The S-70A Firehawk is a version of the S-70 designed for firefighting, rescue, medical evacuation, and external lift of bulky cargo and equipment. The Oregon National Guard was the first military organization in the world to add the Firehawk to its inventory; the Los Angeles County Fire Department was the first municipal organization.
The Army also flies medical evacuation models which are configured as rotary winged medical suites. It also uses the S-70 for special operations by the 160th Special Operations Aviation Regiment ("Night Stalkers") at Fort Campbell, Kentucky, designated as the MH-60K.
The unit cost varies with the version. For example, the unit cost of the Army's UH-60L Black Hawk was $5.9 million while the unit cost of the Air Force MH-60G Pave Hawk was $10.2 million.
- SH-60 Seahawk: US Navy variant for anti-submarine warfare, search and rescue, maritime patrol, all-weather and day/night.
- HH-60 Pave Hawk: USAF heli-rescue variant for search and rescue, MEDEVAC, and combat search and rescue use on day and night operations.
- HH-60 Jayhawk: United States Coast Guard variant for maritime patrol, interdiction, and search and rescue
- VH-60 White Hawk: The US Presidential transport helicopter, Marine One.
The company name for the H-60/S-70 family is the S-70 Black Hawk.
- S-70A Black Hawk (UH-60 Black Hawk): Military model for the export market.
- S-70A Firehawk Firefighting variant of the UH-60L. Tank system designed and built by Aero Union in Chico, California.
- S-70A (N) Naval Hawk Maritime variant that blends the S-70A Black Hawk and S-70B Seahawk designs.
- S-70B/C Seahawk: Maritime military model for the export market.
- S-70C Firehawk: Commercial variant
- S-70i Black Hawk: International military version assembled by Sikorsky subsidiary, PZL Mielec in Poland.
- Sikorsky S-71 - a proposed attack helicopter using dynamic components from the S-70.
- Sikorsky S-92 - Civilian medium-lift derivative of the Black Hawk.
- T-70: A Turkish variant of the S-70i, built under license by Turkish Aerospace Industries with indigenous Turkish mission-computer, avionics, landing gear and transmission. Turkey was to initially to produce about 150 T-70s under license. US Ambassador to Turkey Frank Ricciardone stated that Turkey now intends to produce some 600 T-70s.
Data from SikorskyGeneral characteristics
- Crew: 2
- Capacity: 14-17 seats/12 troops/6 stretchers
- Payload: 4,072 kg (9,000 lb) externally slung
- Length: 19.76 m (64 ft 10 in)
- Rotor diameter: 53 ft 8 in (16.36 m)
- Height: 5.33 m (17 ft 6 in)
- Empty weight: 5347 kg (11,790 lb)
- Max. takeoff weight: 9,997 kg (22,000 lb)
- Powerplant: 2 × General Electric T700-GE-701D turboshaft, 1,409 kW (1,940 shp) at 0.462 Specific fuel consumption each
- Fuel, internal: 1,360 L
- Auxiliary Fuel: 2x 700 L tanks internally, 1,705 L (450 US gal) tank on each inboard pylon and 872 L (230 US gal) tank on each outboard pylon, or 1,705 L (450 US gal) tank on each pylon
- Maximum speed: 361 km/h (195 knots, 224 mph)
- Cruise speed: 163 knots, max cruise (149 knots, normal cruise)
- Range: 463 km, (288 mi, 250 nmi) with 20 min reserve
- Service ceiling: 6,096 m (20,000 ft)
- Rate of climb: 11.43 m/s (2,250 ft/m)</ul>Armament
- Related development
- Sikorsky UH-60 Black Hawk
- Sikorsky HH-60 Pave Hawk
- Sikorsky HH-60 Jayhawk
- MH-60 "Knight Hawk"
- Sikorsky SH-60 Seahawk
- VH-60 Presidential Hawk
- Mitsubishi SH-60
- Sikorsky S-92
- Sikorsky CH-148 Cyclone
- Harbin Z-9
- Related lists
- List of Sikorsky S-70 Models
- List of helicopters
- List of utility helicopters
- List of active military aircraft of the United States
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|40x40px||Wikimedia Commons has media related to Sikorsky S-70.|
- S-70 Black Hawk family page at Sikorsky.com
- S-70 Seahawk family page at Sikorsky.com
- S-70i page at Sikorsky.com
- Sikorsky UH-60/S-70 Black Hawk Family page on centennialofflight.net
- Sikorsky S-70 Black Hawk page on vectorsite.net
- Firehawk, Inc web site
- Sikorsky - Aerofiles.com
- HELIS.com Sikorsky S-70/H-70 Hawk Family Database
- S-70i Black Hawk multirole combat helicopter(Air recognition)