The TV3-117 is a turboshaft engine designed for use in helicopters. It was developed in the Soviet Union and is known for its reliability and efficiency. The engine is commonly used in various helicopter models, including the Mil Mi-8 and Mil Mi-24, providing the necessary power for flight operations. This engine features a modular design, allowing for easier maintenance and repair. It operates on a two-shaft system, which enhances its performance and fuel efficiency. The TV3-117 has been widely adopted in many countries and continues to be a popular choice for military and civilian aviation applications.