To develop the car aerodynamics, teams spend an average of about $50 million to build a wind tunnel at their factory. It is one piece of equipment that separates the big budget teams at the front of the grid from the small budget teams at the back of the grid.

Wind tunnel suppliers to the teams in F1:

Red Bull: In House

McLaren: In House (they have 3 tunnels, 2 F1 grade and 1 automotive grade)

Ferrari: In House

Mercedes: In House (They have 2 tunnels)

Lotus GP: In House [this one is underground]

Force India: At the present time they use McLaren’s; however have plans for their own

Sauber: In house

Toro Rosso: they use Red Bull Technology, however are building one in Faenza

Williams: In house

Caterham: They use Williams, and are using the 40% of the time that Williams’s don’t use for a deal worth €4m a year; they are also using Fondtech in Italy as well to make up their time.

Hispania: Mercedes GP #2 tunnel, but are only using it about 10% to 15% of the time.

Marussia: they use McLaren, this means that McLaren have their 2 F1 grade tunnels at close to full capacity at all times.

*verifiable data fro 2012-2013