A "Single-Engine" aircraft is an airplane powered by one engine. This type of aircraft is commonly used for general aviation, flight training, and recreational flying. Single-engine planes are typically smaller, lighter, and more fuel-efficient than multi-engine aircraft, making them easier to operate and maintain. These planes can be used for various purposes, including private flying, aerial photography, and flight instruction. Popular models include the Cessna 172 and Piper PA-28. Single-engine aircraft are often favored by new pilots due to their simplicity and lower operating costs.