Thread: True Airspeed?
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Old 10-19-2009, 05:49 AM
  #8  
Ewfflyer
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Joined APC: Jul 2006
Position: Turbo-props' and John Deere's
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TAS is the most important value when flight planning, because this is the "Speed" at which you are traveling if there are Zero winds aloft.

Lots of typ-a-holics here, I'll try and keep it simple. Three step plan to getting GS. I avoid CAS calibrations merely on the fact they are minimal at best, and your performance graphs in the POH are already set-up so it won't be detrimental to the cause.

IAS: Basis for all of your information.
TAS: Built off of IAS and Altitude(corrected as mentioned above){POH will have a TAS value for your given altitude and power setting}
GS: Taken from your TAS and corrected for direction of flight vs. winds aloft
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