Dual-Material Heat-Extracting Wheel Fans
Bugatti designed 3D-printed heat-extracting fans for the Bolide’s lightweight magnesium wheels. These radial compressors perform two functions: they pump the air out of the wheel housings through the brakes and draw the warm air to the outside to cool the car’s brakes and minimize aerodynamic lift at high speeds.
These wheel covers employ a hybrid structure with a central bowl made of 3D-printed 0.48mm titanium and a 0.7mm-thick carbon plate with small inner blades, also made of carbon. There are 0.48mm cross-braces to reinforce the rigidity of the central titanium bowl, which weighs only 100 grams.
Total weight for each 18.25-inch rear-wheel turbofan is less than 400 grams and the 17.25-inch front wheel units are even lighter. Bugatti states that only the dual-material solution can achieve this specific buckling resistance and flexural rigidity.