Aircraft engine models refer to the various types of engines used in aviation, primarily categorized into two main types: turbofan and turboprop engines. Turbofan engines are commonly found in commercial airliners, providing high thrust and fuel efficiency, while turboprop engines are typically used in smaller regional aircraft, offering better performance at lower speeds. Each engine model is designed for specific performance characteristics, such as thrust output, fuel consumption, and operational altitude. Manufacturers like General Electric, Rolls-Royce, and Pratt & Whitney produce a range of engine models tailored to different aircraft requirements, ensuring safety and efficiency in air travel.