The blown geometry of the front bumpers is not the only element that manages the flow over the flanks to reduce drag . The spoke profiles of the wheels also contribute , as does the vertical design of the flank itself . The former increase the extraction of air from the wheel well and realign the wake with the flow along the flanks . The ample surface area of the latter acts as a barge board to keep the front wheel wake close to the surface and reduce the transverse size of the wake and thus drag . The barge board design also hides a genuine aero channel from the front wheel well that vents ahead of the rear wheel . This solution helps extract more floor performance to the benefit of both downforce and drag .
The most important development area for downforce was the rear spoiler . To correctly balance front and rear downforce the engineers fully exploited the opportunity created by the repositioned engine air intake and the new rear taillight design . These two solutions meant that the spoiler could be extended to occupy the entire width of the car . Its surface was not only increased in width , but the lip was also lengthened towards the rear which helped increase the downforce without penalising drag .
The most innovative solution , as well a defining characteristic of the car , can be found at the rear of the underbody : floor chimneys are connected to two integrated louvres in the rear wings by vertical ducts . The natural suction created by the curvature of the wings maximises air flow through the ducts and creates a fluid-dynamic connection between flows over the underbody and the upper bodywork . This feature brings three direct benefits : firstly , it reduces the blockage of the underbody by increasing the flow under the front underbody , increasing downforce and shifting the aero balance forwards to improve turn-in . Secondly , the increase in local acceleration of the flow created by the geometry of the intakes on the floor generates a very strong suction which improves rear downforce . Lastly , the rear spoiler also benefits from the additional flow coming from the louvres on the rear wing .
The final area of development was to increase the diffuser ’ s expansion volume , both in the vertical and horizontal plane , thanks to installing the exhaust pipes in a high , central position . The space that was freed up centrally could thus be dedicated to a solution similar to a double diffuser . The diffuser in fact permits the expansion of the flow on two distinct levels and gives a strong connotation to the rear , creating a bridge shape that seems to float in the tail ’ s volume . The concept exploits the high energy from the central area of the flow to efficiently channel the air both inside and outside of the central ‘ bridge ’ structure . This means the flow that passes outside the central channel energises the one inside , boosting the efficiency of the diffuser as a whole .
The Daytona SP3 has a wraparound windscreen in which the glass extends all the way to the start of the removable hard top . A nolder is integrated into its upper seal to accurately direct the flow over the header rail when driving without the hard top . The middle of the roll hoop area dips to follow the shape of the rear bodywork buttresses and the engine cover and thus minimises the possibility of the wake deflected towards the rear header rail tumbling back into the area between the seats . The airflow at the rear of the side windows is channelled by the rear trim behind the headrests towards a centrally recessed slot protected by the windstop so that it is vented outside the cockpit .
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