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2 Answers

‘Planned true airspeed’ and ‘actual true airspeed’

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Student Pilot

Aviation calculators compute ‘planned true airspeed’ and ‘actual true airspeed’ using pressure altitude, temperature and calibrated airspeed.

The results are different, probably because 2 different temperatures are used for the calculations.

Could somebody please explain the difference between the 2 calculations and the difference between the 2 temperatures used in the calculations?

Thanks

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2 Answers



  1. KDS on Sep 29, 2017

    You broke the code. The planned is using the temperature you anticipate and the actual is the temperature you encounter once at that altitude.

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  2. Charles22 on Sep 29, 2017

    Actually my electronic calculators uses 2 different methods to calculate the ‘planned’ and ‘actual’ airspeed and if you use the same temperature value for both methods with everything else also being equal, the results are different.

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