A flying wing is an aircraft design in which the wing is also the main body of the vehicle. Instead of a long fuselage, horizontal tail, and vertical tail, the aircraft has a broad blended wing shape that carries fuel, payload, engines, and crew or electronics. This matters because removing extra body parts can reduce drag and make flight more efficient.
Flying wings are also important in modern aviation because their smooth shapes can help reduce radar detection.
Key Facts
- Lift is produced mainly by the entire wing-shaped body, not just by separate wings.
- Drag force can be modeled as D = 0.5 rho v^2 Cd A.
- Lift force can be modeled as L = 0.5 rho v^2 Cl A.
- A flying wing has no conventional fuselage, tailplane, or vertical tail.
- Yaw, pitch, and roll control often use elevons, split drag rudders, and computerized flight control.
- Low radar visibility comes from smooth blending, fewer vertical surfaces, and careful alignment of edges.
Vocabulary
- Flying wing
- A flying wing is a tailless aircraft in which the wing forms most or all of the main body.
- Elevon
- An elevon is a control surface that combines the functions of an elevator and an aileron to control pitch and roll.
- Lift
- Lift is the aerodynamic force that acts mostly upward and supports an aircraft in flight.
- Drag
- Drag is the aerodynamic force that opposes an aircraft's motion through the air.
- Radar cross section
- Radar cross section is a measure of how detectable an object is by radar.
Common Mistakes to Avoid
- Assuming a flying wing has no fuselage at all, because the central body is usually blended into the wing rather than completely absent.
- Thinking low drag means no drag, because flying wings still experience skin friction, pressure drag, and induced drag.
- Forgetting that tailless aircraft can be harder to stabilize, because the missing tail removes a major source of pitch and yaw stability.
- Treating stealth as invisibility, because stealth only reduces detection range and depends on radar frequency, viewing angle, materials, and shape.
Practice Questions
- 1 A flying wing has wing area A = 120 m^2, lift coefficient Cl = 0.50, air density rho = 1.2 kg/m^3, and speed v = 80 m/s. Use L = 0.5 rho v^2 Cl A to find the lift force.
- 2 A conventional aircraft has drag D = 18,000 N at a certain speed. A flying wing design reduces drag by 22 percent at the same speed. What is the new drag force?
- 3 Explain why a flying wing can have low drag and good stealth properties but still need advanced control systems to fly safely.