The pulley system is described as a mechanism to do what midflight?

• A. Warp wings midflight
• B. Lock landing gear
• C. Adjust flaps
• D. Measure airspeed

Answer: (A)

Pulley systems transmit motion through cables to move surfaces, so they can directly alter a wing’s shape rather than just move a separate device. In flight, twisting or warping the wings changes lift across the span, which is a way to roll the aircraft without needing separate ailerons. Historically, wing warping used cables and pulleys to twist the wings midflight, giving the pilot control by changing wing camber and lift distribution. The idea here is that a pulley-based mechanism would enable changing the wing’s shape while in the air, which fits the described setup. Locking landing gear, measuring airspeed, or adjusting flaps rely on other mechanisms and systems (locks and actuators, sensors, or hydraulic/electric actuators), not a simple pulley arrangement aimed at deforming the wing.