Which of the following is a lift-generating surface on a UAS?

• A. Fuselage
• B. Antenna
• C. Landing Gear
• D. Wings

Answer: (D)

Wings are the lifting surface that creates most of the upward force in a fixed-wing UAS. An airfoil shape is crafted so the air flows faster over the top than beneath, producing lower pressure on the top surface and higher pressure on the bottom. This pressure difference pushes the wing upward, countering the weight of the aircraft. The amount of lift depends on the wing’s size, the air density, the aircraft’s speed, and the angle at which the wing meets the air. This is why wings are designed as the primary lift source in fixed-wing UAS.

Fuselage is the body of the aircraft and may contribute some drag or minor lift, but it’s not the primary lifting surface. An antenna is for communication and does not affect lift. Landing gear supports takeoff and landing and adds drag in flight, not lift.