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Home / Subjects / Flight Performance & Planning / Questions / #804

Does high humidity contribute to decrease in the aircraft performance

  1. False - it cools the engine and thus improves performance
  2. Humidity has no effect on performance
  3. ✓YesCorrect answer
  4. All the answers are wrong

Explanation

High humidity decreases air density because water vapor molecules are lighter (less dense) than the dry air molecules (nitrogen/oxygen) they displace.

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