Apache helicopters are more formidable in combat. Apache and Blackhawk difference:
Apache is AH-64, Blackhawk is UH-60. apache crew two people, cockpit tandem arrangement, that is, front and rear seats, can not carry infantry, only to provide ground fire support. The Black Hawk is used for troop transportation, command and control, casualty evacuation, and reconnaissance, and can also carry weapons to provide support.
The AH-64A's four-bladed main rotor system was developed from the flexible belt rotor system of the previous Hughes OH-6 helicopter (the military version was the Hughes 500), which is a modified fully-articulated rotor system. The AH-64D's rotor system connects the hub to the rotor blades with a V-belt stacked on top of the rotor blade in the hub cowl, which is a flexible V-belt replacing the swing hinge and pitch hinge of the traditional fully-articulated rotor. This flexible V-band replaces the swing hinge and pitch hinge of traditional fully-hinged rotor blades.
Driving the hubcap through the pitch lever deforms the band and the elastic bearings in the hub, allowing the rotor to swing and pitch. In addition, the steel band is still connected to the rotor blades through the traditional oscillating hinge, and there are also two oscillating dampers on both sides of the rotor.
Expanded:
The helicopter, one of the most distinctive creations of 20th century aviation technology, has greatly expanded the range of applications for aircraft. Helicopters are typical dual-use products, which can be widely used in transportation, patrol, tourism, rescue and other fields. The maximum speed of the helicopter can reach 300km/h or more, the dive limit speed of nearly 400km/h, the practical limit of lift up to 6000 meters, the general range of up to 600-800km or so.
Carrying internal and external fuel tanks, the transit range can reach more than 2000km. According to the different needs of the helicopter has a different takeoff weight. Currently the world's largest heavy helicopter in use is the Russian Mi-26 (maximum takeoff weight of 56t, payload 20t). The current practical application is the mechanical drive type single-rotor helicopter and double-rotor helicopter.
The single-rotor helicopter is the largest number of helicopters, the helicopter's salient features is that it can do low altitude (meters above the ground), low speed (from hovering) and the nose direction of the constant maneuvering flight, especially in a small area of the site of vertical takeoff and landing. Because of these characteristics make it has a wide range of uses and development prospects.
In the military has been widely used in ground attack, landing, weapons delivery, logistical support, battlefield rescue, reconnaissance and patrol, command and control, communications, anti-submarine mine clearance, electronic countermeasures. In civilian use, it has been applied to short-distance transportation, medical care, disaster relief, emergency rescue, lifting equipment, geological exploration, forest protection and fire-fighting, and aerial photography. The transportation of personnel and materials between oil wells and bases at sea is an important aspect of civil use.
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