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Sport Pilot Airplane practice question 27

Which combination of atmospheric conditions will reduce aircraft takeoff and climb performance?

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Correct answer: C. High temperature, high relative humidity, and high density altitude.

High temperature, high humidity and high density altitude all mean less dense air. The engine makes less power, the propeller produces less thrust and the wing needs more true airspeed, so takeoff and climb performance suffer.

References

Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), p. 4-4, Principles of Flight · search it in our library

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Question 27 from the FAA document Sport Pilot Airplane (SPA) Sample Questions (U.S. Government work, public domain) · ACS/LSC code PLT124. The FAA does not publish an answer key; the answer and explanation are ours, with references. Verify against the current regulations and handbooks.