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Basic Characteristics of a Helicopter
Basic Characteristics of a Helicopter
Helicopters are rotorcraft that take off and land vertically. They can fly forward and backward as well as fly laterally. In addition, these aircraft are capable of hovering. Here are some of the basic characteristics of a helicopter. The basic design of a helicopter is quite simple. A helicopter has four rotors. Each rotor has a unique blade shape. The design allows for the rotors to rotate at different speeds.
Another major function of a helicopter is the ability to carry heavy loads. Large helicopters can carry a wide variety of weights. They can also hover and drop off loads of concrete, metal, or even sand. The large helicopters can also be used to place transmission towers on tall buildings or raise radio towers away from roads. A helicopter can be useful in many industries but is most often used in logging. It is difficult to build roads in rural areas and environmental concerns make this process difficult.
Helicopters are made of metal or organic composite materials. The latter is the preferred option due to its higher strength-to-weight ratio. They are reinforced with carbon fiber, glass, or aramid fiber to reduce weight. Most composite components are comprised of multiple layers of fiber-impregnated resins. Aluminum and stainless steel are used as substructures. In areas of greater stress, titanium is used. The structural tubing is often filled with molten sodium silicate to increase the torsional stability.
Helicopter airframes are made of various materials, including metal or organic composites. Depending on the needs of the helicopter, the highest-performance composites are chosen. For heavier-duty applications, fiberglass, aramid, or carbon fiber may be used. Some models of rotors can be reinforced with glass, aramid, or carbon fiber. However, a typical rotor is made of many layers of fiber-impregnated resins.
The mechanical parts of a helicopter include the rotor blades, which are connected to a rotating mast by a feathering hinge. The pitch links are short rods that can tilt the blades to a shallower or steeper angle. The pitch links are controlled by a rotating upper swash plate that spins on bearings around a static lower swash plate. Eventually, this mechanism will make the helicopter stable and allow it to hover safely.
The main rotor of a helicopter is made of two main rotors that rotate in opposite directions. The rotor discs produce lift in one direction and drag in the other. Consequently, it is possible for a rotor to turn in either direction. It is important to note that a rotary-axle is not connected to a single axis. This means that a rotor will move with the motion of the rotor and can cause a rotary-wing aircraft to become unstable.
A helicopter's main rotor is connected to a hub at the top of its mast by a feathering hinge. The blades move freely as they rotate and are attached to a metal disc called a swash plate. The swash plate slides on bearings around a second plate. The rotor is attached to a rotating swash plate that pushes up on the pitch links. Likewise, the rotor of a helicopter can swivel back and forth between its two halves.
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