Bugatti‘s Centodieci hyper sports car has successfully completed wind tunnel tests to check the airflow on and around the vehicle at a variety of speeds and control the high-performance system’s brake cooling. The wind tunnel envelops the elegant bodywork at up to 300 km/h before slipping off at the rear. A 9,300 PS engine drives an eight-meter propeller, generating a permanent intensive airflow that is potent enough for an airplane to take off.
We use this to simulate the airflows under the vehicle and in the wheel wells, and then precisely tune the Centodieci. – André Kullig, Technical Project Manager for one and few-off projects at Bugatti
The Centodieci hyper sports car is limited to ten models, all of which were sold out within a matter of hours at a net unit price of eight million euros.
Ahead of the wind tunnel testing, the driveshafts were dismantled to prevent the external drive of the wheels from transferring any forces into the vehicle. The car is then fixed with four small pins in the underbody and its height is varied according to the testing plan. With a hyper sports car that drives at well above 350 km/h, the aerodynamics and downthrust have to be one hundred percent accurate. Following computer simulation and the first prototype rollout, additional wind tunnel tests are made before a vehicle undergoes high-speed testing on test tracks and proving grounds.
With the prototype in the wind tunnel, the developers make slight changes to get closer to the desired values. The front diffuser flaps can be adjusted by minute angles for this, and the rear wing, which will ultimately be in a fixed position, can likewise be modified by just a few degrees.
To check the airflow on and around the Centodieci at a variety of speeds, Bugatti engineers use a standard setup to determine a benchmark figure for comparison with other Bugatti hyper sports cars. They then run various tests up to the test bench’s maximum speed. With the help of special fog images, they also check the high-performance system’s brake cooling in the wind tunnel. In further tests, the wind hits the bodywork at various sideways angles to simulate the vehicle’s handling when taking corners quickly with shifting loads.
Article Source: Lux Expose