There are three main phases which may repeat in cycles if the system is not damped. The first phase which precedes porpoising, is when the aero-load is generated by the bottom (underbody) and by the wings in particular the front one. At this point, when the front wing comes too close to the ground for the maximum stall speed, it loses the generated load. Therefore, the front end of the car loses aero-load. Sequentially, the car begins to lift the front end, regaining the functionality of the front wing and at the underbody inlet, but losing the load in the center of the venturi channels.