lift$44595$ - definizione. Che cos'è lift$44595$
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Cosa (chi) è lift$44595$ - definizione

Dissymetry of Lift; Dissimilar lift; Asymmetry of lift; Asymmetric lift

Lift (force)         
  • Airflow separating from a wing at a high angle of attack
  • Control volumes of different shapes that have been used in analyzing the momentum balance in the 2D flow around a lifting airfoil. The airfoil is assumed to exert a downward force −L' per unit span on the air, and the proportions in which that force is manifested as momentum fluxes and pressure differences at the outer boundary are indicated for each different shape of control volume.
  • Lift is defined as the component of the [[aerodynamic force]] that is perpendicular to the flow direction, and drag is the component that is parallel to the flow direction.
  • An illustration of the incorrect equal transit-time explanation of airfoil lift.<ref name="nasa_equal_transit"/>
  • streamlines]].
  • Illustration of the distribution of higher-than-ambient pressure on the ground under an airplane in subsonic flight
  • isobars]] of equal pressure along their length. The arrows show the pressure differential from high (red) to low (blue) and hence also the net force which causes the air to accelerate in that direction.
  • Streamlines and streamtubes around an airfoil generating lift. Note the narrower streamtubes above and the wider streamtubes below.
FORCE; AERODYNAMICS TERM
Dynamic lift; Lift force; Lift Force; Useful lift; Lift equation; Aerodynamic lift; Lift (physics); Lift (fluid mechanics); Lift distribution; Equal transit-time fallacy; Equal transit time fallacy; Lifting force; Lift vector; Lift (airplane); Three-dimensional flow; Lift (aerodynamics)
A fluid flowing around an object exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction.
Vertical-lift bridge         
MOVABLE BRIDGE IN WHICH A SPAN RISES VERTICALLY WHILE REMAINING PARALLEL WITH THE DECK
Lift bridges; Liftspan bridge; Lift bridge; Lift Bridge; Vertical lift bridge; Lift-bridge
A vertical-lift bridge or just lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck.
Patient lift         
ASSISTIVE DEVICE IN HEALTH CARE
Sit-to-stand lift; Patient hoist; Hoyer lift; Sling lift
A patient lift (patient hoist, jack hoist, hydraulic lift) may be either a sling lift or a sit-to-stand lift. This is an assistive device that allows patients in hospitals and nursing homes and people receiving home health care to be transferred between a bed and a chair or other similar resting places, by the use of electrical or hydraulic power.

Wikipedia

Dissymmetry of lift

Dissymmetry of lift: 2–20  (also known as asymmetry of lift: 342  or asymmetric lift) in rotorcraft aerodynamics refers to an unequal amount of lift on opposite sides of the rotor disc. It is a phenomenon that affects single-rotor helicopters and autogyros in forward flight.

A rotor blade that is moving in the same direction as the aircraft is called the advancing blade and the blade moving in the opposite direction is called the retreating blade. When viewed from above, most American helicopter rotors turn counter-clockwise; French and Russian helicopters turn clockwise.: 141 

Balancing lift across the rotor disc is important to a helicopter's stability. The amount of lift generated by an airfoil is proportional to the square of its airspeed (velocity). In a hover, the rotor blades have equal airspeeds and therefore equal lift. However, in forward flight the advancing blade has a higher airspeed than the retreating blade, creating uneven lift across the rotor disc.: 1–104