4K, HD, HQ wallpapers of helicopters, vertical backgrounds

A helicopter is a rotary-wing aircraft capable of vertical trial and landing. The name comes from helikopteron, meaning wings in kindergarten. In 1907, Frenchman Paul Cornu flew the first powered helicopter.

Helicopters can take off and land down vertically and hold steady in the air. The flying principles of helicopters and airplanes are essentially the same. In order to obtain gripping force in aircraft, the aircraft is moved in the air. However, since the wing is attached to the fuselage, it is in a fixed structure. But in helicopters, the wing is not fixed, it is movable. In other words, a rotating wing, that is, a propeller is used in helicopters to obtain lift. The fan consists of two or more blades. The profile of the propeller blade is the same as the profile of the aircraft wing. The helicopter's engine turns the blades. As the pallets move in the air, low pressure occurs on their upper surfaces and high pressure on their lower surfaces. This pressure difference creates the bearing force. With the increase in the number of revolutions of the blades and the angle of attack, the magnitude of this carrying force also increases. In the opposite case, it decreases. When the lift force is coequal to the weight of the helicopter, the helicopter stays in the air. When large, it rises vertically. When it is less, it descends vertically.

When the plane of rotation of the prop is tilted, that is, the direction of the lift force created by the propeller is changed, the helicopter moves forward-backward and right-left. Thus, the helicopter is provided to move in the air. Since the propeller is constantly spinning, it tries to rotate the body of the helicopter. To prevent this, a smaller propeller is used at the tail of the helicopter. The propeller in the tail absorbs the torque on the body. In addition, the rotation of the body can be achieved by changing the amount of damping.

The helicopter was chosen because of its operational characteristics – vertical take-off and landing and ability to hover for long periods not previously possible with other aircraft, as well as the aircraft's handling characteristics under low airspeed conditions, or to perform time- or work-intensive tasks to achieve on the ground. Today, helicopter uses include transporting people and cargo, military uses, construction, firefighting, search and rescue, tourism, medical transport, law enforcement, agriculture, news, media, aerial surveillance, and others.

Please choose your desired helicopter wallpaper and set it as a lock screen or home screen to give your phone an outstanding appearance.

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