[2026] PTE Academic Listening - Fill in the Blanks (Type In)

The development of modern aviation has been greatly by the study of bird flight. Early engineers, such as Otto Lilienthal, closely how wings generate lift by interacting with moving air. These observations led to the invention of the , a curved surface designed to create aerodynamic forces. However, unlike birds, early aircraft were often and difficult to control during takeoff and landing. The introduction of flexible control surfaces, like , finally allowed pilots to maneuver their planes with precision. Today, the field of continues to inspire new designs that improve the fuel efficiency and safety of commercial jets.