The Lotus 79 used bodywork on the underside that effectively created a venturi, thus as the air rushed under the car the air was forced to accelerate and the pressure of the air was lowered dramatically.
Lotus 79 Bodywork
The Lotus 79 used bodywork on the underside that effectively created a venturi, thus as the air rushed under the car the air was forced to accelerate and the pressure of the air was lowered dramatically.
