flapping


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Related to flapping: flapping tremor

flapping

[′flap·iŋ]
(metallurgy)
Striking through the surface of molten copper to hasten oxidation by increasing the exposure to air.

flapping

flappingclick for a larger image
The angular movement of a rotor blade above or below the plane of the hub. Blades ride higher and lower during their rotation, but they can do so only if they are allowed to move freely about a horizontal hinge or flexible root element. Design features allow for the blades to flap vertically about the flapping hinge. Blade flapping compensates for dissymmetry of lift as the retreating side flaps down resulting in increased angle of attack with consequent increase in lift. The advancing blade flaps up and the angle of attack reduces resulting in decreased lift.

flapping

A condition in which a route in a network becomes unavailable and available over and over again. See route dampening.
References in periodicals archive ?
And the fluid dynamics which produced by the motion of UUV can be described by the mass forces and drag forces of the main body and the fluid dynamics of the flapping hydrofoil [11].
According to Green theorem, the perturbation velocity potential [PHI](t) in inviscid, incompressible, and irrotational flow with non-uniform velocity V(x, y, z,t) of an arbitrary field point P(x, y, z,t) can be expressed as an integral on the boundary surface of flow field S, which is composed of flapping hydrofoil surface [S.
Now, researchers at the Georgia Institute of Technology propose using flexible wings that are driven by a simple sinusoidal flapping motion.
Unlike fixed-wing and rotary-wing air vehicles, micro air vehicles integrate lifting, thrusting and hanging into a flapping wing system, and have the ability to cruise a long distance with a small energy supply.
I understand that the Irish authorities have approached the flapping community, as flapping is so big in Ireland that racing under rules is losing horses.
What is the difference between a jockey returning to race under rules after 12 months' flapping and a horse doing the same thing?
OUT OF THIN AIR Despite his current passion for flapping wings, Colozza started out working on Mars flight as a fixed-wing guy.
Flapping helps transfer heat from blood to the air to cool the whole animal, says Spevak.
MUTTLEY, you probably will not remember such flapping tracks as Bolton and Blackburn which were a lot better running surfaces than a good few NGRC venues.
This unanticipated position "refutes a common belief that a flag in a laminar wind should be always flapping," says Zhang.