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跑道入口内移

跑道入口内移(英語:displaced threshold, DTHR)是位于跑道实际起点或终点之外的特定跑道入口。

移位的跑道入口紧邻“跑道移位部分”(以黑色显示)的右侧。在此图中,入口内移处用两组四个中的八个白色块进行标记。

跑道的移位部分只可起飞,不可着陆。在跑道的另一端着陆后,航空器可以使用跑道移位部分脱离跑道[1][2][3]

大多数情况下,跑道入口内移是为了让进场的飞机越过障碍物,同时仍然允许离场的飞机可使用跑道的全部长度。对于受航空器进近影响的居民区,或者如果跑道的起始部分无法供航空器着陆,也可以内移跑道入口降噪。飞机预计会降落在内移区域之外。允许起飞的飞机使用跑道的移位部分进行起飞或着陆滑跑,即使离场或滑跑的航空器的撞击强度低于降落,但路面阻力有明显下降[2]

跑道的永久移位部分有两个标记:

  • 跑道中心线的箭头,和
  • 横跨跑道的一根距跑道入口6米处的1.8米宽的白线[3]

印度德里英迪拉甘地国际机场11/29号跑道的29号端入口内移1460米(4790英尺)[4]

因噪音问题,约翰·F·肯尼迪国际机场04L/22R跑道的22R端入口移位。这将这条12079英尺的跑道的可用着陆距离缩短至7795英尺。

参考文献

  1. ^ Aircraft Information Manual 2013, Chapter 2-3-3 h (2) Section 3. Airport Marking Aids and Signs 互联网档案馆存檔,存档日期July 3, 2013,.
  2. ^ 2.0 2.1 3.3 Displaced Runway Threshold. [2022-05-30]. (原始内容存档于2016-03-03). 
  3. ^ 3.0 3.1 Threshold Markings, (原始内容存档于April 7, 2016) 
  4. ^ GPS Visualizer : aerial view of the runway with a ruler页面存档备份,存于互联网档案馆) (50 meters)
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跑道入口内移
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