QUICK TURNAROUND LIMITS, Established the              快速周转极限，

minimum amount of time to cool the wheel brakes         在下一个起飞许可之前，已确定的飞机轮刹车的最少冷

before the next take off is permitted.                却时间。

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英汉对照民用航空词典                                    BOEING

QUIESCENT, Condition of an electrical circuit when no 寂静状态，

input signal is applied to it.                         电路上没有输人信号的状态。

 R

RACK, A place for storage of modules in the          支架，

electrical/electronic equipment compartment.           电气／电子设备舱内，用以存放组件的地方。

RADAR, A device which measures the time between the  雷达，

transmission and reception of radio pulses and provides 测量无线电脉冲从传输到接收所需的时间，并提供范

information on range, azimuth, and/or elevation of   围，方位，和／或脉冲信号传输途径上物体标高的装置。

objects in the path of the transmitted pulses.

RADAR VECTORS, Headings given to the pilot from a    雷达引导，

controller using radar.                                由使用雷达的空中交通管制员给予飞行员的航向。

RADIAL, A magnetic bearing extending from a          径向线，

VORNORTACITACAN navigation facility.                     由甚高频全向信标/塔康联合定位／塔康系统导航设

                                                     施发射出来的磁方位线。

RADIO ALTITUDE (HEIGHT) (RA), The distance of an     无线电高度（RA），

aircraft above the ground, as determined by a radio      由无线电高度表系统测定的飞机与地面的距离。

altimeter system.

RAM, SEE - RANDOM ACCESS MEMORY                      随机存取存储器，

                                                       见 Random Access Memory