What are the variable physical properties of the atmosphere that affect the helicopter performance?

Question

Question PPL(H) - Private Pilot License - Flight Performance and Planning

QuizVDS · Accepted Answer

Temperature, pressure, and humidity

QuizVDS · Answer

Temperature, pressure, and carbon content

QuizVDS · Answer

Pressure, humidity, and specific gravity

QuizVDS · Answer

Pressure, humidity, and nitrogen content

Id 297 - PPL(H) EN - What are the variable physical properties of the atmosphere that affect the helicopter performance?