The story of the Brabham BT46B. Swedish Grand Prix, 1978. Gordon Murray designed the Brabham BT46 for the Brabham team, owned by Bernie Ecclestone at the time, for the 1978 Formula One season. The "B" variant of the car, also known as the "fan car", was introduced at the 1978 Swedish Grand Prix as a counter to the dominant ground effect Lotus 79. The BT46B generated an immense amount of downforce utilising a fan, claimed to be for increased cooling, but which also extracted air from beneath the