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- Helicopter | Facts, History, Types | Britannica
A helicopter is an aircraft with one or more power-driven horizontal propellers or rotors that enable it to take off and land vertically, to move in any direction, or to remain stationary in the air
- Helicopter - Wikipedia
A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally
- Helicopter - Rotor, Flight, Design | Britannica
Helicopter - Rotor, Flight, Design: Unlike fixed-wing aircraft, the helicopter’s main airfoil is the rotating blade assembly (rotor) mounted atop its fuselage on a hinged shaft (mast) connected with the vehicle’s engine and flight controls
- How does a helicopter work? - Explain that Stuff
The science of a helicopter is exactly the same as the science of an airplane: it works by generating lift—an upward-pushing force that overcomes its weight and sweeps it into the air Planes make lift with airfoils (wings that have a curved cross-section)
- How Helicopters Work - HowStuffWorks
A helicopter's main rotor is the most important part of the vehicle It provides the lift that allows the helicopter to fly, as well as the control that allows the helicopter to move laterally, make turns and change altitude To handle all of these tasks, the rotor must first be incredibly strong
- 62 Helicopters Vertical Flight - Embry–Riddle Aeronautical University
Helicopters are a type of Vertical Take Off and Landing (VTOL) aircraft They can take off and land from almost anywhere on the ground or at sea, hover motionless in the air, and then fly in any direction at the pilot’s whim
- Helicopter - Encyclopedia. com
Helicopters are aircraft characterized by large-diameter, powered, rotating blades Such a craft can lift itself vertically by accelerating air downward at an angle
- Helicopter History Site
Since 1997, the Helicopter History Site has provided freely accessible information on all aspects of helicopters and vertical flight Featured sections of the website include history of helicopter manufacturers, industry news, and an ever-growing database of over 59,000 individual helicopters
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