V2EX indicated airspeed

Indicated Airspeed

定义 Definition

指示空速:飞机空速表(airspeed indicator)直接显示的速度读数,通常以节(knots)或英里/小时表示。它经过对仪表误差与气压高度等因素的完全修正;与之相关的还有 Calibrated Airspeed (CAS)True Airspeed (TAS) 等。(该术语主要用于航空与飞行性能/操纵。)

发音 Pronunciation (IPA)

/ndketd erspid/

例句 Examples

The pilot held 80 knots indicated airspeed on final approach.
飞行员在最后进近时把指示空速保持在80节。

Because indicated airspeed is affected by air density and instrument/position errors, pilots use it with performance charts and may convert it to calibrated or true airspeed when needed.
由于指示空速会受到空气密度以及仪表/位置误差的影响,飞行员会把它与性能图表配合使用,并在需要时换算为校准空速或真空速。

词源 Etymology

indicated 来自拉丁语 indicāre(“指出、指示”),表示“仪表所指示的”;airspeedair + 的组合词,意为“在空气中的速度”。合起来,indicated airspeed 强调“空速表指针/数字所显示的空速”,区别于经过修正或换算后的其他空速概念。

相关词 Related Words

文学与常见出处 Literary Works / Notable Sources

  • Pilot’s Handbook of Aeronautical Knowledge(FAA)
  • Airplane Flying Handbook(FAA)
  • Aerodynamics for Naval Aviators(美海军航空教材)
  • Flight Training Manual(多国飞行训练教材/版本中常见该术语)
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