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mediumdistance-speed

An aircraft at FL350 with an OAT of -55°C and IAS of 250 kt will have a TAS that is:

Greater than IAS. At high altitude, lower air density causes TAS to be significantly higher than IAS; at FL350, TAS is roughly 1.7 times IAS.

Less than IAS

Equal to IAS

Depends on wind

Greater than IAS

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