The Sich V431X is a robust and reliable gas turbine engine designed to function as an Auxiliary Power Unit (APU). Manufactured by Motor Sich, this APU is primarily utilized in helicopters, most notably the Mi-8 and Mi-17 series. Its main purpose is to provide a source of compressed bleed air for starting the main engines and to supply AC electrical power to the aircraft’s systems both on the ground and during flight. The V431X is engineered for high-altitude operation and is valued for its durability and consistent performance in a wide range of operational environments.