The principle of operation of such an engine is compression of the air necessary for combustion with the help of turbocompressor blades, direction of this air into the combustion chamber, and when it ignites with the fuel, mechanical work of combustion products on the blades of the turbine located on the same shaft with the compressor. That is the difference between the gas-turbine engine and any other machine having either compressor forcing blades, as in all kinds of blowers, or turbine blades, as in steam turbine power units or hydroelectric power plants.