Aircraft propulsion refers to the methods and systems used to generate thrust that enables an aircraft to move through the air. The primary types of propulsion systems are jet engines and propeller engines. Jet engines work by expelling high-speed exhaust gases, while propeller engines use rotating blades to create lift and thrust. The efficiency and performance of aircraft propulsion are crucial for flight operations. Factors such as fuel type, engine design, and aerodynamics play significant roles in determining how effectively an aircraft can travel. Advances in technology continue to improve propulsion systems, making them more powerful and environmentally friendly.