Which component changes lift, drag and roll?

Which component changes lift, drag and roll?

• A. Flaps
• B. Wing
• C. Spoiler
• D. Slats

Answer: (C)

Spoilers are surfaces that directly alter lift and drag on the wing. When they deploy, they disrupt the airflow, reducing lift and increasing drag. If spoilers on one wing deploy more than on the other, a differential effect creates a rolling moment, allowing control of roll. Flaps and slats mainly change lift and drag to optimize takeoff, landing, and high-angle performance, but they don’t provide a direct roll-control action. The wing itself generates lift and drag, but the ability to roll is achieved through control surfaces like spoilers (and, in many aircraft, ailerons) rather than the wing as a single unit.

Spoilers are surfaces that directly alter lift and drag on the wing. When they deploy, they disrupt the airflow, reducing lift and increasing drag. If spoilers on one wing deploy more than on the other, a differential effect creates a rolling moment, allowing control of roll. Flaps and slats mainly change lift and drag to optimize takeoff, landing, and high-angle performance, but they don’t provide a direct roll-control action. The wing itself generates lift and drag, but the ability to roll is achieved through control surfaces like spoilers (and, in many aircraft, ailerons) rather than the wing as a single unit.