Inglês/Português
<< hovering autorotation | hovering flight | hovering in ground effect >>
Back to: "H"hovering flight
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
- Nota adicional1
- Hovering is the most challenging part of flying a helicopter. This is because a helicopter generates its own gusty air while in a hover, which acts against the fuselage and flight control surfaces. The end result is constant control inputs and corrections by the pilot to keep the helicopter where it is required to be.
- Nota adicional2
- During hovering flight, a helicopter maintains a constant position over a selected point, usually a few feet above the ground. The ability of the helicopter to hover comes from the both the lift component, which is the force developed by the main rotor(s) to overcome gravity and aircraft weight, and the thrust component, which acts horizontally to accelerate or decelerate the helicopter in the desired direction.
- Nota adicional3
- Hovering is actually an element of vertical flight. Increasing the angle of incidence of the rotor blades (pitch) while keeping their rotation speed constant generates additional lift and the helicopter ascends. Decreasing the pitch causes the helicopter to descend. In a no-wind condition in which lift and thrust are less than weight and drag, the helicopter descends vertically. If lift and thrust are greater than weight and drag, the helicopter ascends vertically.
- Nota adicional4
- During hovering flight, a single main rotor helicopter tends to drift in the same direction as antitorque rotor thrust. This drifting tendency is called translating tendency.
- Contexto
- Before starting sideward hovering flight, make sure the area you are going to hover into is clear. Then pick two points of reference in a line in the direction of sideward hovering flight to help you maintain the proper ground track. These reference points should be kept in line throughout the maneuver.
- Subárea1
- Rotorcraft
- Related Term
- hover
- hovering
- hovering autorotation
- hovering in ground effect