Further to reduce interference drag attempts are also being made to provide a smoother underbody structure for the car, together with suitable recessing for the exhaust system and other components wherever this is feasible.
The gap between the car underbody (undertray, front flap or forewing) and the ground
The idea behind an undertray is to use the close proximity of the vehicle to the ground, termed ground effect, to cause a venturi-like effect under the vehicle.
