Miniature engines are small-scale engines designed for various applications, including model airplanes, cars, and boats. These engines can be powered by different fuels, such as gasoline, diesel, or electricity, and are often used in hobbyist projects. Their compact size allows for easy integration into models, providing realistic movement and performance. These engines come in various types, including internal combustion engines and electric motors. Miniature engines are popular among enthusiasts who enjoy building and racing models, as they offer a hands-on experience in engineering and mechanics. They also serve educational purposes, helping individuals learn about the principles of mechanical engineering.