The AI-450M engine is designed to power multi-purpose helicopters and has a two-rotor design consisting of a gas generator rotor and free turbine rotor. The free turbine transmits power to the reduction gear, arranged in front of the engine, through the shaft passing inside the gas generator rotor shaft. The engine consists of reduction gear with accessory gearbox built in the same casing; gas generator containing inlet section, compressor, combustion chamber and compressor turbine; free turbine with its shaft.
Each rotor is mounted on two bearing supports built in the engine stator. To obtain the required engine vibration characteristics the gas generator rotor front bearing support and free turbine rear rotor bearing support are carried on elastic-oil dampers.