This burner has a rotary cup and a fan. The cup and the fan are rotated by an electric motor with a shaft. Oil is feed to the oil distributer to throw at the inner surface of the cup. The cup rotates at the speed of about 3600 rpm. Then oil flows in a swirling motion and is thrown as fine droplets at the other end. Fan or blower supplies primary air in whirling motion opposite to oil motion. This helps to further disintegrate the oil particles and reach combustion chamber.