F&C engine includes a central shaft mounted a cylindrical cam, that formed with two pieces of different diameter steel tubes, as the inner and outer walls, the upper end of the outer wall, placed a driving flange, to drive the engine timing devices. on the two layer walls (for light duty or small engine the single layer wall is acceptable) with pairs of peak and valley channel, a overdrive clutch; inside the cam contained a dynamotor to form a hybrid; a magnetic clutch, for engaging or disengaging the cylindrical cam; a driving plate for driving the devices that not related to the engine timing; a cylinder to produce power and transfer the power to the cam through a push rod; a guide plate to guide the push rod; many support rollers for supporting the cam; a tubular case with foot for contain and support the engine.