| AH-64 Apache | | | | Description | | Role | Attack | | Crew | 2 — one pilot, one co-pilot/gunner (CPG) | | Dimensions | | Length | 17.7 m (58.3 ft) with rotors | | Wingspan | 4.9 m (16.3 ft) | | Height | 3.87 m (12.7 ft) | | Wing area | 168.11 m² (1,809.5 ft²) main rotor disc | | Weights | | Empty | 5,165 kg (11,387 lb) | | Loaded | 8,006 kg (17,650 lb) | | Max take-off | 9,525 kg (21,000 lb) | | Powerplant | | Engines | 2 × GE T700 Turboshafts | | Power | 1,238 kW (1,660 shp) | | Performance | | Maximum speed | 365 km/h (197 kt) | | Combat range | 482 km (260 n miles) | | Ferry range | 1,899 km (1,024 n miles) | | Service ceiling | 6,400 m (21,000 ft) | | Rate of climb | 762 m/min (2,500 ft/min) | | Armament | | Guns | M230 30mm automatic cannon, 1200 rds | | Missiles | Hellfire/Hellfire II (and Stinger, Starstreak, Sidewinder/Sidearm proposed) | | Rockets | Hydra 70, FFAR | The Boeing IDS AH-64 Apache is the US Army's principal attack helicopter, the successor to the AH-1 Cobra.
The US Army issued a request for proposals (RFP) in 1972 for an Advanced Attack Helicopter (AAH). From an initial list of 5 manufacturers Hughes Aircraft's Toolco Aircraft Division (later Hughes Helicopters) and Bell were selected as finalists. Hughes' Model 97/YAH-64 was selected over Bell's Model 409/YAH-63 in 1976. First flight of a development prototype occurred in 1977 but it was not until 1982 that a production contract was signed. In 1983 the first production helicopter was rolled out at Hughes Helicopter's facility at Mesa, Arizona. In 1984 Hughes Helicopters was purchased by McDonnell Douglas for $500m. This became Boeing Helicopters with the merger of McDonnell Douglas and Boeing in 1996.
Two major models of AH-64 Apache are in service in the US Army; AH-64A and AH-64D. B- and C-variants were manufactured but never entered service. A number of other models have been derived from both AH-64A and AH-64D for export. The British Westland WAH-64 is based on the AH-64D with several improvements.
Built to endure front-line environments, it can operate during the day or night and in adverse weather using the integrated helmet and display sight system. The Apache is also equipped with some of the latest avionics and electronics, such as the Target Acquisition Designation Sight, Pilot Night Vision System (TADS/PNVS), Black Hole passive infrared countermeasures, nap_of_earth navigation, and GPS.
Original unit cost for the AH-64A was about US$14.5 million. In September 2003, Greece ordered 12 AH-64D for a total cost of $675 million (presumably including weapons and support), indicating a gross unit cost for the AH-64D of $56.25 million.
The advanced model, the AH-64D Apache Longbow, is equipped with an improved sensor suite and weapon systems. The key improvement over the A-variant is the Longbow Fire Control Radar dome installed over the main rotor. The elevated position of the radome allows detection and (arcing) missile engagement of targets even when the helicopter itself is concealed by an obstacle (e.g. terrain, trees or buildings). Further, a radio modem integrated with the sensor suite allows a D-variant Apache to share targetting data with other AH-64Ds and AH-64As that do not have a line-of-sight to the target. In this manner a group of Apaches can engage multiple targets but only reveal the radome of one D-variant Apache.
Notes
Recent reports indicate that the helicopter is vulnerable; of craft deployed in Afghanistan in 2001_02 over 80% were badly damaged by ground fire.
See also
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