Which component generates lift and propulsion during flight?

• A. Main Rotor Blades
• B. Tail Rotor
• C. Fuselage
• D. Landing Gear

Answer: (A)

Lift and propulsion in a helicopter come from the rotating main rotor blades. As the rotor turns, the blades push air downward; by Newton’s third law, that downward push creates an upward lift that supports the aircraft. Tilting the rotor disk with the cyclic changes the direction of that lift, giving a forward thrust component so the helicopter can move ahead. The amount of lift is controlled mainly by the collective pitch, which increases or decreases the blade angle to raise or lower the aircraft. The tail rotor’s job is to counter the torque from the main rotor and provide yaw control; it does not generate the primary lift or forward propulsion. The fuselage and landing gear do not create lift or propulsion. So the main rotor blades are responsible for both lift and propulsion during flight.