Hidden inside F1 factories, engineers use blasts of high-speed air to shape race-winning cars. Wind tunnels are multi-million dollar, high-tech facilities where aerodynamicists experiment. 

What happens in the wind tunnel usually stays in the wind tunnel, but Formula Why is going into this secretive world with Alpine F1 Team's Technical Director, Matt Harman. He tells us why F1 teams use wind tunnels, why they're so secretive and the incredible way the sport's rule makers, the FIA, keep an eye on how much teams use them. 

Christian and Katie also break down the rules about wind tunnels and why teams spend millions to have their own tunnels. 

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