CAA NZ CPL Theory - Principles Of Flight & Aircraft Performance Practice Questions - CAA NZ CPL Theory - Principles Of Flight & Aircraft Performance (New Zealand) Exam

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What primary aerodynamic phenomenon occurs when an aircraft flies within one wingspan distance above the ground surface?

Induced drag decreases significantly due to reduction in upwash, downwash, and wingtip vortices Parasite drag increases due to compressed air underneath the wings Critical angle of attack decreases, causing an immediate stall at normal speeds Tailplane downforce increases, creating an extreme nose-up pitching moment

Correct Answer:

Induced drag decreases significantly due to reduction in upwash, downwash, and wingtip vortices

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