Multi-engine aircraft are airplanes equipped with two or more engines. These engines can provide greater power and redundancy, enhancing safety and performance. If one engine fails, the aircraft can still operate on the remaining engines, making them a popular choice for commercial and cargo flights. These aircraft come in various configurations, including twin-engine and four-engine designs. Multi-engine planes are often used for longer flights, as they can carry heavier loads and travel greater distances. They are also commonly used in military operations and for pilot training, where learning to manage multiple engines is essential.