Upon extension of a spoiler on a wing:

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

CD is increased and CL is decreased

QuizVDS · Answer

Only CL is decreased (CD remains unaffected)

QuizVDS · Answer

CD is increased, while CL remains unaffected

QuizVDS · Answer

Both CL and CD are increased

Id 155 - ATPL - Upon extension of a spoiler on a wing: