On the next page, you'll find out about the specifications of a UH-60L Black Hawk. In the next section, you will learn more about how the Black Hawk is used to transport soldiers, artillery, and other equipment, and more about the built-in safety features that help the chopper survive if it comes under attack. Its power and maneuverability allow the Black Hawk to move soldiers quickly to strategic locations on the battlefield, and just as quickly get those soldiers back to safety. By adjusting the pitch of the tail rotor, the pilot can turn the helicopter left or right.Ī soldier performs a maintenance check on the tail rotor of a UH-60 Black Hawk. The tail rotor of a Black Hawk has an 11-foot (3.35-m) blade that spins to create lateral force and stabilize the helicopter. A tail rotor, which is attached to the tail boom, is how most helicopters counteract the torque created by the main rotor.
Torque created by blade rotation is exerted on the helicopter's fuselage, which will spin in a counter direction unless it's neutralized. A change in each blade's pitch creates uneven lift, allowing the helicopter to tilt and fly in a particular direction.
These plates control each blade's pitch, or angle of attack. This mechanism is a combination of two plates - one fixed and one rotating - that are attached to the main rotor. In addition to controlling the disc rotation, the pilot can further increase lift by adjusting the swash plate assembly. The disc rotation of the Black Hawk generates enough force to lift the vehicle with crew, troops, and as much as a 9,000-pound (4,082.33-kg) external payload. Larger helicopters or helicopters that carry heavy loads, such as the Black Hawk, require a large rotor disc. The diameter of the Black Hawk's rotor disc is 53 feet, 8 inches (16.36 m). As the blades cut through the air, they create the rotor disc, which is the circle created as the blades spin. The stronger, leading edge of the blade is made of titanium and nickel and is trimmed with an anti-erosion strip, which protects the blade from wear as it skims across the tree tops or flies in abrasive desert air.Īs the drive shaft turns the rotor head, the blades begin to spin.
#Swing it round like a helicopter skin
The blade skin and trailing edge are made of composite materials. Soldiers perform a check of the top rotor on the UH-60 Black hawk on the ramp.Ī soldier performs a maintenance check on the top rotor of a UH-60 Black Hawk. Each blade consists of a titanium spar, which is a metal strip that runs from the base of the blade to its tip, and a Nomex honeycomb material. The drive shaft extends to the top of the helicopter, where it connects to the rotor head, which is comprised of the rotor hub and four rotor blades. Two General Electric T700-GE-701C turboshaft engines turn the drive shaft. To learn more about lift, read How Airplanes Work. Once that pressure under the blades is higher than the pressure above the blades, the helicopter lifts off the ground.
The blade rotation causes the air above the blades to move faster than the air below them, which creates pressure. Lift is generated as the angled blades spin through the air. Flight is achieved when the helicopter engines turn the tilted blades fast enough to generate lift. UH-60A Black Hawks transport ground forces during a riot control exercise.Ī Black Hawk takes to the air like any other helicopter. Photo courtesy Department of Defense - Defense Visual Information Center
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