Extreme Downforce--Fan Race Car With Ground Effect : r/aerodynamics

Is Ducati using ground effect for more grip in MotoGP? - Motor Sport Magazine

Tech Talk: Modern ground effect aerodynamics

Can we increase the downforce of a racing car by putting a fan at the bottom of it which will suck the air under it? - Quora

Gary Anderson's verdict on 'worrying' new Ferrari - The Race

Tech Talk: Modern ground effect aerodynamics

Teams Were Only Making Racing's Biggest Aerodynamic Problem Worse. Here's How Series Took Them On

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How a day driving high-downforce cars at VIR taught me I'm OK being slow

Developing NASCAR's Gen 7 Aerodynamics - Racecar Engineering