發信人: bm-bm ()    看板: Aero
日期: Tue Nov 13 15:42:34 2001
標題: Re: 關於航速...

>==> paraside (飛行夢想起飛的11月) 的文章中提到:
>       飛機的航速是由空速表測知，但是空速表是如何測得飛機的航速卻又不
>受外界風速的影響而測出正確數據。
>      此外飛機對地速度是如何得知，以及ㄧ般搭乘飛機時，機長廣播所報告出來的
>速度是空速還是對地速度？                                   謝謝



  total pressure = dynamic pressure + state pressure
  
  state pressure = density of air * g * high

  dynamic pressure = 0.5 * density of air * square of speed

  these equation can calculate the speed

  the value of speed is called indicate airspeed (IAS)

  Calibrated the instrument error, we can find the Calibrated airspeed(CAS)

  the equivalent airspeed (EAS) is the flight speed in the standard sea-level

  air mass that would produce the same free-stream dynamic pressure, so we

  fix the correct density altitude can get the True airspeed (TAS)


  

 
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* Origin: 中山大學-美麗之島BBS * From: 61.216.49.8 [已通過認證]
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