The Apache AH 64:Variants

     An Apache AH 64C variant

    An Apache AH 64A variant

The Apache Longbow 64D:the most lethal multimission copter
AH-64A
     The AH-64A is a two-seat attack helicopter powered by two GE T700 turbo-shaft engines, with high-mounted exhausts on either side of the rotor shaft. The crew sit in tandem, with the pilot sitting behind and above the copilot-gunner. The crew compartment is armored against 23mm gunfire fired from ZSU-23/4s. The helicopter is armed with a 30mm M230 chain gun that is slaved to the gunner's helmet-mounted gunsight. The AH-64 carries a range of external stores on its stub-wing pylons, typically a mixture of AGM-114 Hellfire anti-tank missiles,Hydra 70 general-purpose unguided 70mm rockets, and AIM-92 Stinger anti-aircraft missiles for defence. In case of emergency the pylons also have mounting points for personnel transfer.

AH-64B
     An AH-64B variant was initally designed for naval operation by the Marine Corps, but was never manufactured.As of 2007, the Marine Corps continues to use the AH-1 SuperCobra.
In 1991 after Operation Desert Storm, the AH-64B was a proposed upgrade to 254 AH-64As. The upgrade included new rotor blades, a Global Positioning System (GPS), improved navigaton systems and new radios.The B program was cancelled in 1992.

AH-64C
     Additional funding in late 1991 resulted in a program to upgrade AH-64As to a AH-64B+ version. More funding changed the plan to upgrade to AH-64C. The C upgrade would include all changes to be included in the Longbow except for mast mounted radar and newer engines. However, after 1993, the C designation was dropped.
The upgrades would go forward. However, since the only difference between the C model and the radar-equipped D model was the radar, which could be moved from one aircraft to another, a decision was made to not distinguish between the two versions, despite the presence or absence of the radar.

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 AN/APG-78 Longbow 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 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. Apaches that include all of the improvements of the Longbow Apache, with the exception of the Fire Control Radar are still designated as "AH-64D Apache Longbows", as the radome is removable and interchangeable between aircraft. American AH-64Ds are currently flying in Iraq and Afghanistan without the Fire Control Radar as there are simply no armored threats for coalition forces to deal with.
     The aircraft was updated with T700-GE-701C engines, and a fully-integrated cockpit. The forward fuselage of the aircraft was expanded to accommodate new systems. In addition, the aircraft receives improved survivability, communications, and navigation capabilities. Most existing capabilities of the AH-64A Apache are retained.
A number of other models have been derived from both AH-64A and AH-64D for export. The British-built Westland WAH-64 Apache (assembled from kits purchased from Boeing) is based on the AH-64D with several different systems, including newer engines.

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