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Private Pilot Licence (PPL) – Canada · Question

What is the effect of an increase in altitude on an aircraft's true airspeed (TAS) with a constant indicated airspeed (IAS)?

As altitude increases, air density decreases. For a constant indicated airspeed (which is based on dynamic pressure), the true airspeed must increase to maintai

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Question: What is the effect of an increase in altitude on an aircraft's true airspeed (TAS) with a constant indicated airspeed (IAS)?

Answer options:

  • TAS will decrease.
  • TAS will remain the same. ✅ TAS will increase.
  • TAS is not affected by altitude.

Correct answer: TAS will increase.

Explanation: As altitude increases, air density decreases. For a constant indicated airspeed (which is based on dynamic pressure), the true airspeed must increase to maintain that dynamic pressure in thinner air.

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