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航空术语词典Dictionary of Aeronautical Terms 下

时间:2011-03-11 23:18来源:蓝天飞行翻译 作者:航空 点击:


warm-up time. The time needed for certain types of components or systems to reach their normal operating temperature. Aircraft reciprocating engines must be operated for a specified warm-up time before they are safe for takeoff.
warning area (aircraft navigation). An area containing hazards to any aircraft not participating in the activities being conducted in the area. Warning areas may contain intensive military training, gunnery exercises, or special weapons testing.
warning horn. An aural warning device that is used in conjunction with warning lights to alert the flight crew of a dangerous condition. A continuous warning horn alerts the pilot that the landing gear is not down and locked when either of the throttles is retarded for landing.
An intermittent warning horn sounds when the thrust levers are advanced for takeoff if certain conditions exist that could make takeoff dangerous.
warning lights. Indicator lights installed in the cockpit of an aircraft to warn the flight crew of some unsafe condition. Overheat conditions, low fuel supply, low oil pressure, unlocked doors, or landing gear in an unsafe position are all indicated by warning lights.
warp clock. An alignment indicator included in a structural repair manual to show the orientation of the plies of a composite material. The ply direction is shown in relation to a reference direction.

warp threads (fabric). Threads that run the length of a piece of fabric. Threads that run across the fabric are called woof, or fill, threads.
warp tracers. Threads of a different color from the warp threads that are woven into a material to identify the direction of the warp threads.
Warren truss. A type of structural truss in which the main lengthwise members are separated by rigid diagonal members that carry both tensile and compressive loads. Most welded-steel truss fuselages are Warren truss structures.
washer (type of hardware). A flat metal disk with a hole in its center used to provide a smooth surface for a nut or the bolt head to seat against. Washers are also used to shim, or fill a space, between a nut and a surface to take up space if the grip length of the bolt is too long for the material being clamped.
wash-in (airplane rigging). A condition in airplane rigging in which a wing is twisted so its angle of incidence is greater at the tip than at the root. Washing-in a wing increases the lift to correct for a wing-heavy condition.
wash-out (airplane rigging). A condition in airplane rigging in which a wing is twisted so its angle of incidence is less at the tip than at the root. Wash-out decreases the lift the wing produces. If an airplane is left-wing-heavy, the left wing can be washed in and the right wing washed out.
wash primer (aircraft finishing system component). A type of primer used to prepare an aluminum or magnesium surface to receive a topcoat of finishing material. Wash primer contains an etchant, a material that chemically roughens the metal, to prepare the surface to accept the topcoat material.

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