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Aircraft speed: Difference between revisions
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Knowing TAS during flight is surprisingly useless - for navigation, ground speed is needed, and aerodynamic limits do not depend on TAS but rather IAS. The chief value of TAS is as a measure of aircraft performance and in pre-flight planning before the wind effect is taken into account. | Knowing TAS during flight is surprisingly useless - for navigation, ground speed is needed, and aerodynamic limits do not depend on TAS but rather IAS. The chief value of TAS is as a measure of aircraft performance and in pre-flight planning before the wind effect is taken into account. | ||
The TAS can be calculated from CAS, air temperature and [[Altitude#Pressure altitude|pressure altitude]]. | The TAS can be calculated from CAS, air temperature and [[Altitude#Pressure altitude|pressure altitude]] and is the second step to calculate the GS from IAS for navigation. | ||
Often TAS and GS are assumed (confused) to be the same, they are not. | Often TAS and GS are assumed (confused) to be the same, they are not. | ||