Which statement describes a disadvantage of fixed-wing UAS?

Which statement describes a disadvantage of fixed-wing UAS?

• A. It can hover in place.
• B. It is optimized for vertical takeoff and landing.
• C. It has unlimited vertical climb rate.
• D. It requires a runway to become airborne.

Answer: (D)

Fixed-wing UAS generate lift from air moving over their wings, which happens best when they have forward airspeed. To reach that airspeed, they typically need a runway or some other launch method. This makes takeoff and landing less flexible than rotorcraft, which can lift off vertically in confined spaces. Hovering in place isn’t possible for a standard fixed-wing design, and the climb rate is limited by engine power and weight rather than being unlimited. So, needing a runway to become airborne is the clear disadvantage, because it constrains where and how you can operate the aircraft.

Fixed-wing UAS generate lift from air moving over their wings, which happens best when they have forward airspeed. To reach that airspeed, they typically need a runway or some other launch method. This makes takeoff and landing less flexible than rotorcraft, which can lift off vertically in confined spaces. Hovering in place isn’t possible for a standard fixed-wing design, and the climb rate is limited by engine power and weight rather than being unlimited. So, needing a runway to become airborne is the clear disadvantage, because it constrains where and how you can operate the aircraft.