Boeing AH-64 Apache

Template:Infobox Aircraft

The AH-64 Apache Helicopter is the United States Army's principal attack helicopter, the successor to the AH-1 Cobra.

History

The United States 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 77/YAH-64 was selected over Bell's Model 409/YAH-63 in 1976. First flight of a development prototype occurred on September 30 1975 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 $500 million. The company became Boeing with the merger of McDonnell Douglas and Boeing in August 1997.

Features

Two major models of AH-64 Apache are in service in the US Army; AH-64A and AH-64D. An AH-64B variant was designed but never manufactured. An AH-64D without Fire Control Radar and with GE-701 engines rather than 701C engines was initially referred to as the AH-64C model. A number of other models have been derived from both AH-64A and AH-64D for export. The British built Westland WAH-64 (assembled from kits purchased from Boeing) 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.

MOS's 15X/15Y (Apache armament electrical systems repairer) and MOS 15R (AH-64 Attack Helicopter Repairer) are easily the keystone to any successful AH-64 combat operation.

AH-64D

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 which houses a millimeter-wave Fire Control Radar (FCR) target acquisition system. 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 targeting 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.

Also the aircraft was updated with T700-GE-701C engines, and a fully-integrated cockpit. In addition, the aircraft receives improved survivability, communications, and navigation capabilities. Most existing capabilities of the AH-64A Apache are retained.

Combat operations

United States

Apache was first used in combat during the 1989 invasion of Panama, Operation Just Cause. Apache AH-64 and AH-64Ds have played important roles in several Middle Eastern wars, including the Gulf war, Operation Enduring Freedom in Afghanistan, and Operation Iraqi Freedom in Iraq. The Apaches were proven to be excellent tank hunters and also destroyed hundreds of armored vehicles (mainly of the Iraqi army).

Recent reports indicate that the helicopter is vulnerable to ground forces in certain environments. Operation Enduring Freedom witnessed as high as 80% of Apaches badly damaged by ground fire in mountainous regions with disparate enemy forces. Similarly, the Apache has been shown to be vulnerable to infantry when operating in urban terrain. During the Second Gulf War, Iraqi ground troops and insurgents were able to damage propulsion and flight control systems with ground-fire, sometimes obligating immediate emergency landings. During the Operation Iraqi Freedom, some Apaches were damaged in urban combat areas including one captured by Iraqi troops and paraded on international TV.^{[citation needed]}

There are various factors that contribute to these occurrences. First, Apaches were designed to engage and destroy armor at safe ranges, where they could not be fired upon. Secondly, infantry are less easily detected than armor. In Iraq, the close-quarters, and ample cover afforded by the urban environment make it easy for ground forces to attack at close ranges (50 - 850 m). This environment brought out the Apache's vulnerability to close range attacks from heavy caliber machine guns (0.5 inch). Also, since the Apache is only capable of firing at a single target at a time, it is vulnerable when attacked from several dispersed positions. Combat utility helicopters like the UH-60 Black Hawk may not suffer this disadvantage, as they have multiple manned side armaments, adding extra protection in certain tactical situations. However, the relative effectiveness of utility helicopters is debatable when taking into account other factors like the Apache's superior maneuverability, armament, and speed. In either case, the Apache's use in both attack and support roles in urban environments has proven effective. Apaches have been successful working in support roles with ground troops, and as an observation platform for directing artillery. Despite the Apache's vulnerability in urban operations, it is currently rated as the most survivable of all military helicopters. The vast majority of Apache helicopters that have taken heavy combat damage have been able to continue their assigned missions and return safely to their bases.

Recent ABC News reports (Jan. 17th) a Russian surface-to-air missile (SA-7) shooting down an Apache AH-64 helicopter on Jan. 16th, which resulted in a crash and crew deaths. This was the third US Apache helicopter to be shot down in just ten days. US military fears for many unaccounted SA-7 missiles in Iraq. (Source: [1])

Israel

The Israeli Air Force uses the Apaches as a high-tech platform to perform precision strikes with guided missiles against various targets. The AH-64A attacked and destroyed dozens of Hezbollah outposts in Lebanon during the 1990s, attacking in all weather conditions - day and night. During the al-Aqsa Intifada, the IAF used the Apaches to kill senior Hamas figures, such as Ahmed Yasin and Adnan al-Ghoul with guided missiles. In the Israel-Lebanon conflict two IDF AH-64D helicopters collided, killing 1 pilot and wounding 4, all critically. In another incident in the conflict, an IDF Apache crashed near the Lebanese border, killing two the two pilots.

United Kingdom

The UK licences the Apache design resulting in the Westland WAH-64 Apache of which 67 have been built. They replace the Lynx Helicopter as the Army's tactical attack helicopter. They are actively deployed, for example, in Afghanistan [2]

Cost and users

The 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. Singapore purchased a total of 20 AH-64D Longbow Apache aircraft in two batches between 1999 and 2001. Pakistan is thought to have ordered 6 Apache Longbow for its various anti-terrorism missions; unofficial reports suggest that the Pakistan Army has a requirement of up to 30 AH-64D Apache Longbow by 2010.

In addition to the U.S., Greece, and Singapore, countries which use the Apache include Japan, Egypt, the Netherlands, Saudi Arabia, the United Arab Emirates, Kuwait, Israel, South Korea, Bahrain, and Jordan. (As of 2006, the latter three countries do not own any Apache helicopters.)

The United Kingdom is using 67 WAH-64 which will operate alongside amphibious forces as necessary and have a folding blade assembly for carrier operations. Taiwan and Pakistan over the years have considered procuring the AH-64D.

Specifications

Data from Jane's Air Forces^[1]

General characteristics

Crew: 2: one pilot, one CPG (co-pilot/gunner)
Length: 58 ft 4 in (17.7 in) with rotors turning

Performance Armament

Guns: 1× M230 30 mm (1.18 in) cannon, 1,200 rounds
Missiles: combination of AGM-114 Hellfire, AIM-92 Stinger, AIM-9 Sidewinder, Hydra 70, FFAR missiles

Popular culture

The Apache made an appearance in several movies over the years, as it is the US's main attack helicopter. It can be seen in the following movies and video games.

Fire Birds (or Wings of the Apache) starring Nicholas Cage, Tommy Lee Jones, and Sean Young.
The AH-64D Longbow is the featured attack helicopter in the Janes Longbow Series of aircraft simulations, Jane's AH-64D Longbow and Jane's AH-64D Longbow 2.
The Apache was a featured helicopter in the flight sim Gunship. The sequel, Gunship 2000 introduced the Longbow as well.
The AH-64 is featured prominently in Electronic Arts' Strike series of video games.
In the computer game Enemy Engaged: Apache/Havoc, players can choose to command either an AH-64D Longbow or a Russian-made Mi-28 Havoc-B .
The Apache is one of the boss sections in the video game Half-Life
A British Army Apache WAH-64 was used in an episode of the BBC car program Top Gear, where presenter Jeremy Clarkson attempted to dodge missile lock in a Lotus Exige. Clarkson was successful, so long as the Apache was restricted to the area above the racetrack; the Apache achieved lock within seconds once it was allowed to go further away.

Notes

^ Cite error: The named reference Janes was invoked but never defined (see the help page).

External links

Jane's AH-64 page
Apache AH-64 Peten (Israeli Air Force website)
Apache AH-64 crashed over Albania, during 1999 Kosovo war
Footage of an AH-64 cannon engagement during the second Gulf War
AviationExplorer.com: Brief technical information about the Apache.
HowStuffWorks.com Overview with supporting images of the Apache Helicopter.