What typically generates thrust in an aircraft?

The generation of thrust in an aircraft is predominantly achieved through propellers. Propellers work by rotating and creating a difference in air pressure, which effectively pulls or pushes the aircraft forward. As the blades of the propeller move through the air, they create lift, which propels the aircraft in the direction opposite to the airflow. This mechanism is fundamental to many types of aircraft, especially those powered by piston engines or turboprop engines, where the propellers are directly linked to the engine's output.

While rudders serve a crucial role in controlling the aircraft's yaw and maintaining stability, they do not contribute to thrust generation. Gravity is a force that acts on the aircraft and keeps it grounded when not in flight, while wings are primarily responsible for generating lift rather than thrust. Wings shape the airflow to maintain altitude and support the aircraft's weight, but they do not produce the forward motion required for flight.