On a helicopter, the main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic...

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...

A tandem-rotor aircraft is an aircraft with two large helicopter rotor assemblies mounted one in front of the other in the horizontal plane. This configuration...

(contra-rotating). This rotor configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau. The idea of coaxial rotors originates...

intermeshing-rotor helicopter (or synchropter) is a helicopter with a set of two main rotors turning in opposite directions, with each rotor mast mounted...

system transmit mechanically to the rotor, producing aerodynamic effects on the rotor blades that make the helicopter move in a desired way. To tilt forward...

transverse rotor design, with a few exceptions that use other multirotor layouts. Tiltrotor design combines the VTOL capability of a helicopter with the...

such as a helicopter Rotor (turbine), the rotor of a turbine powered by fluid pressure Rotor (crank), a variable-angle bicycle crank Rotor (brake), the...

laterally. Helicopters have several different configurations of one or more main rotors. Helicopters with a single shaft-driven main lift rotor require some...

planned. On 18 January 2024 a rotor blade broke off during a rough landing on the 72nd flight, permanently grounding the helicopter. NASA announced the end...

propagation of helicopter noise can alert an enemy to an incoming helicopter in time to re-orient defenses (see acoustic signature). Rotor noise Thickness...

in which the main rotor system of a helicopter or other rotary-wing aircraft turns by the action of air moving up through the rotor, as with an autogyro...

The tail rotor is a smaller rotor mounted vertically or near-vertically at the tail of a traditional single-rotor helicopter, where it rotates to generate...

quadrocopter, or quadrotor is a type of helicopter or multicopter that has four rotors. Although quadrotor helicopters and convertiplanes have long been flown...

A gyrodyne is a type of VTOL aircraft with a helicopter rotor-like system that is driven by its engine for takeoff and landing only, and includes one or...

Ground resonance is an imbalance in the rotation of a helicopter rotor when the blades become bunched up on one side of their rotational plane and cause...

The RotorWay Helicopter Manufacturing Company, formerly called RotorWay International, was a manufacturer of kit helicopters located in Chandler, Arizona...

attack helicopter. Lockheed designed the Cheyenne using a four-blade rigid-rotor system and configured the aircraft as a compound helicopter with low-mounted...

Sikorsky S-72 was an experimental Sikorsky Aircraft compound helicopter developed as the Rotor Systems Research Aircraft (RSRA) for the National Aeronautics...

helicopter was significantly updated in the 2020s with first a fenestron replacing the traditional tail rotor, followed later by a 5-blade main rotor...

transition to heavier helicopters. Due to the specific training required by the low-inertia rotor system and a teetering main rotor, operation of the Robinson...

The Boeing CH-47 Chinook is a tandem-rotor helicopter originally developed by American rotorcraft company Vertol and now manufactured by Boeing Defense...

flapping in the helicopter's rotor blades, which can cause the entire rotor assembly to shear off the aircraft. Robinson helicopters use a patented design...

failure of the tail rotor control linkage. Vichai Srivaddhanaprabha frequently travelled to and from the stadium in the helicopter for Leicester City's...

ratio is a useful non-dimensional quantity in helicopter and propeller theory, since propellers and rotors will experience the same angle of attack on every...

relatively low disk loading are typically called rotors, including helicopter main rotors and tail rotors; propellers typically have a higher disk loading...

a propeller or helicopter rotor, by W.J.M. Rankine (1865), Alfred George Greenhill (1888) and Robert Edmund Froude (1889). The rotor is modeled as an...

suppress main rotor torque. Venzie left the firm in 1943.: 143  The PV-2 (NX-37061) was a more conventional design and became the third helicopter flown in...

an unpowered rotor in free autorotation to develop lift. While similar to a helicopter rotor in appearance, the autogyro's unpowered rotor disc must have...

introduced a revolutionary advance in helicopter design, dispensing with a conventional anti-torque tail rotor in favor of the Hughes/McDonnell-Douglas-developed...