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  2. Dynamic stall on helicopter rotors - Wikipedia

    en.wikipedia.org/wiki/Dynamic_stall_on...

    Rotor map of dynamic stall locations for all conditions. Stage 4: full separation of the flow on the upper surface of the airfoil can be observed, accompanied by the peak of nose-down pitch moment. Stage 5: the full flow reattachment is achieved as the AoA gradually decreases until it is fairly smaller than the static stall angle. [10]

  3. Helicopter rotor - Wikipedia

    en.wikipedia.org/wiki/Helicopter_rotor

    At the top of the mast is the attachment point (colloquially called a Jesus nut) for the rotor blades called the hub. The rotor blades are then attached to the hub, and the hub can have 10-20 times the drag of the blade. [1] Main rotor systems are classified according to how the main rotor blades are attached and move relative to the main rotor ...

  4. Powered lift - Wikipedia

    en.wikipedia.org/wiki/Powered_lift

    The powered rotors of a tiltrotor (sometimes called proprotor) are mounted on rotating shafts or nacelles at the end of a fixed wing, and used for both lift and propulsion. For vertical flight, the rotors are angled to provide thrust upwards, lifting the way a helicopter rotor does.

  5. Tiltrotor - Wikipedia

    en.wikipedia.org/wiki/Tiltrotor

    Original Patent filed May 28,1929 Transcendental Model 1-G hovering Bell X-22 A Bell XV-15 prepares to land. The first work in the direction of a tilt-rotor (French "Convertible") seems to have originated ca. 1902 by the French-Swiss brothers Henri and Armand Dufaux, for which they got a patent in February 1904, and made their work public in April 1905.

  6. Rotor wing - Wikipedia

    en.wikipedia.org/wiki/Rotor_wing

    The various types of such rotor wings may be classified according to the axis of the rotor. Types include: [1] [2] Vertical-axis. Conventional rotary wings as used by modern rotorcraft. Spanwise horizontal-axis. Wing rotor: an airfoil-section horizontal-axis rotor which creates the primary lift. Magnus rotor: a rotor which creates lift via the ...

  7. Disk loading - Wikipedia

    en.wikipedia.org/wiki/Disk_loading

    For a given weight, a helicopter with shorter rotors will have higher disk loading, and will require more engine power to hover. A low disk loading improves autorotation performance in rotorcraft. [5] [6] Typically, an autogyro (or gyroplane) has a lower rotor disk loading than a helicopter, which provides a slower rate of descent in ...

  8. Tail rotor - Wikipedia

    en.wikipedia.org/wiki/Tail_rotor

    The tail rotor system rotates airfoils, small wings called blades, that vary in pitch in order to vary the amount of thrust they produce.The blades most often utilize a composite material construction, such as a core made of aluminum honeycomb or plasticized paper honeycomb, covered in a skin made of aluminum or carbon fiber composite.

  9. Blue Edge - Wikipedia

    en.wikipedia.org/wiki/Blue_Edge

    The Airbus Helicopters H160 with the new Blue Edge rotor design.. Blue Edge is an advanced design of rotor blade developed and produced by multinational helicopter manufacturer Airbus Helicopters in cooperation with the French aerospace laboratory ONERA and the German Aerospace Center, purposed to achieve a meaningful reduction in both noise emissions and vibration as well as enhancement in ...

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