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英汉对照民用航空词典                                     BOEING

UPSET HEAD, The head produced on the tail of a rivet  铆钉镦头，

during the installation driving process. (See           在铆钉铆接过程中，铆钉尾部一端形成的凸头（见

Manufactured Head.)                                   Manufactured Head）。

V

V  (TAKEOFF DECISION SPEED), Is the maximum

 1                                                    V1 （起飞决断速度），

speed at which the rejected takeoff maneuver can be     根据联邦适航条例的规则和程序，飞机能进行中断起飞

initiated and the airplane stopped within the remaining 且在剩余场长内停止的最大速度。它是在起飞滑跑时仍可

field length under the conditions and procedures defined 停住飞机的最后决策点。

in the FAR's. It is the latest point in the takeoff roll where

a stop can be initiated.

V2 (TAKEOFF SAFETY SPEED), The speed flown after       2 （起飞安全

                                                      V           速度），

takeoff during engine-out climbout maneuvers to assure  在一发不工作起飞后的爬升中为保证足够的梯度能力

adequate gradient capability and maneuver margin.     和操纵裕度所飞的速度。

VACUUM, A negative pressure or pressure below         真空，

atmospheric, measured in inches or millimeters of       负压或比大气压力低的压力。常用若干寸（或若干毫米）

mercury.                                              汞柱。

VAPORIZE, The mechanical process in which a liquid is 蒸发，

changed into a vapor.                                   液体汽化的物理变化过程。

VECTOR, A heading issued to an aircraft to provide    引导，

navigational guidance by radar.                         由雷达提供的航向，以给予飞机导航引导。

VENT, A small hole orifice or restrictor in a component 通气装置，

for allowing pressure in the component to be the same   部件内，用以使部件内的压力与周围环境压力相同的小