As GM develops vehicles to meet a 54.5 mpg corporate average fuel economy target by the 2025 model year, “we’re going to have to improve aerodynamic efficiency of every one of our vehicles,” Miller told reporters this month during a media tour of the new wind tunnel.
The 35,000-square-foot tunnel has a 1,100-hp fan that uses 18 carbon fiber blades. It’s just a few hundred feet from GM’s 35-year-old full-scale wind tunnel, which will undergo a major renovation next year. GM says that having both wind tunnels will enable development teams to work faster and on more models.
Miller said that since the full-scale wind tunnel opened in 1980, GM has reduced the average drag of its vehicle fleet by one-third.