On: F1 2014: All aboard the 'power train' - new rules explained

[jsvaughan]

You might be referring to the Gordon Murray designed Brabham BT46 "Fan car":

http://en.wikipedia.org/wiki/Brabham_BT46

[sanoli → jsvaughan]

That's the one I was thinking about, thanks!

From the Wikipedia article: "The BT46B generated an immense level of downforce by means of a fan, claimed to be for increased cooling, but which also extracted air from beneath the car. The car only raced once in this configuration in the Formula One World Championship—when Niki Lauda won the 1978 Swedish Grand Prix at Anderstorp. To the dismay of its designer Gordon Murray, the concept was voluntarily withdrawn from racing again by Bernie Ecclestone."