Which term describes the aerodynamic component that generates lift and helps control altitude and direction of the helicopter?

Which term describes the aerodynamic component that generates lift and helps control altitude and direction of the helicopter?

• A. Tail rotor
• B. Wing
• C. Airfoil
• D. Fuselage

Answer: (C)

Lift in a helicopter comes from surfaces shaped to move air efficiently—these are airfoils. The rotor blades are airfoils, and as they spin, the air flows over their curved surfaces at the right angle of attack to create a pressure difference. That difference produces lift, which supports the helicopter’s weight and lets you rise or hold altitude. By changing the blade pitch and how the rotor disc is tilted, you adjust lift to climb or descend and steer the aircraft. The tail rotor mainly counters torque and controls yaw, not the primary lift. Fixed wings aren’t used for lift in typical helicopters, and the fuselage alone doesn’t generate the lift needed for sustained flight.

Lift in a helicopter comes from surfaces shaped to move air efficiently—these are airfoils. The rotor blades are airfoils, and as they spin, the air flows over their curved surfaces at the right angle of attack to create a pressure difference. That difference produces lift, which supports the helicopter’s weight and lets you rise or hold altitude. By changing the blade pitch and how the rotor disc is tilted, you adjust lift to climb or descend and steer the aircraft. The tail rotor mainly counters torque and controls yaw, not the primary lift. Fixed wings aren’t used for lift in typical helicopters, and the fuselage alone doesn’t generate the lift needed for sustained flight.