 Complete the following phrase:  Although Brabham experimented with airdams and underbody skirts in the mid-1970s, the team, like the rest of the field, did not immediately understand Lotuss development of a ground effect car in 1977. The Brabham BT46B Fan car of 1978, generated enormous downforce with a fan, which sucked air from beneath the car, although its claimed use was for engine cooling. The car raced only once in the Formula One World ChampionshipNiki Lauda winning the 