Two engines and VR-8A gearbox make up the power plant of the Mi-8 helicopter.
Axial-flow 10-stage compressor, compressor 2-stage turbine, 2-stage free turbine, annular combustion chamber with eight fuel injectors and two starting igniters.
The long duration of the Mi-8 helicopter service in more than 30 countries corroborates a high degree of reliability of its power plant and equipment.