----------------------- Page 18-----------------------

英漢對照民用航空詞典                                      BOEING

BALANCED FIELD LENGTH, The field length                平衡場長，

associated with optimum aircraft performance when        當障礙物非限制因素使飛機達到最佳性能的場長。在此

obstacles are not a constraint. In this case, after engine 情況下，V1時發(fā)動機故障，要完成加速、起飛、離地35

failure at V1, the distance required to accelerate, takeoff 英尺所需距離等于相同速度下完成全停所需的距離。

and reach a height of 35 feet is equal to the distance

required to stop from the same speed.

BALLAST, A weight installed in an aircraft to maintain 壓艙物，

the center of gravity within allowable limits.           為保持飛機重心在許可范圍內面裝載的配重物。

BALL NUT, A fixed spherical nut driven by the          球形螺母，

jackscrew for flap and stabilizer movement.              由粗重螺桿驅動的固定的球形螺母，用以使襟翼和水平

                                                       安定面運動。

BAR OUT OF VIEW, A signal used to remove the flight    指引桿消失，

director command bar(s).                                 用于除去飛行指引桿的信號。

BAROMETRIC PRESSURE, The pressure of air above         氣壓，

zero pressure measured in inches of mercury (in Hg) or   零壓力以上的空氣壓力。通常以多少寸高水銀柱（in

in millibars (MB).                                     Hg）或毫巴（MB）來表示。

BASE METAL, The underlining metal to which alloying    基底金屬，

agents or metals are added.                              指合金中的主要金屬成份。

BATTERY, An electrical device for changing stored      電瓶，

chemical energy into direct electric current.            將儲蓄的化學能轉變?yōu)橹绷麟姷碾姎庋b置。

                                      TECHNICAL DICTIONARY                                   17

----------------------- Page 19-----------------------