F1 Banned: Brabham BT46B ‘Fan Car’

In 1978, the Brabham ‘fan car’ made a dramatic entrance into Formula 1. Debuting at the Swedish Grand Prix, it won its first race and sparked endless discussions and debates. Its design and impact are still talked about today.

Design of the BT46B

Brabham’s team, aiming to outdo their competitors, introduced the BT46. Initially, they experimented with a unique heat exchanger system instead of traditional radiators to save weight. However, they had to redesign it due to insufficient cooling.

The team eventually developed the BT46B, which included a fan to create extra downforce. This design, possibly inspired by the Chaparral 2J sports car, used the car’s engine to power the fan, which doubled as a cooling mechanism. This clever design trick kept the car within the legal limits.

Brabham’s design team faced several hurdles, including sealing the car’s floor to maximize the fan’s effect. They equipped the car with special instruments to help the driver adjust to its unique handling characteristics.

Source: SlotForum

Controversy and Competition around Brabham BT46B

When the Brabham BT46B debuted at the Swedish Grand Prix in 1978, it caused an immediate stir. Niki Lauda, driving the fan car, easily won the race. However, the victory was mired in controversy. Other teams protested, arguing that the fan gave Brabham an unfair advantage and was against the spirit of the sport.

The controversy surrounding the fan car was intense. Just days after its victory, the FIA, Formula 1’s governing body, banned the use of movable aerodynamic devices, effectively outlawing the BT46B’s fan. This decision was a significant blow to Brabham and Gordon Murray, but it also marked the car’s place in F1 history.

Though it raced only once, the Brabham BT46B fan car left an indelible mark on Formula 1. It remains a symbol of ingenuity and the relentless pursuit of innovation in motorsports.

5 Facts About Brabham’s Iconic F1 Fan Car

1️⃣ Alfa Romeo’s role in the fan car’s creation 🛠️

The chunky Flat 12 Alfa Romeo engine in the Brabham car made creating conventional ground effect designs tough. This challenge led to the birth of the fan car concept.

2️⃣ Dustbin lids as disguise 🗑️

Brabham’s team used simple dustbin lids to cover the fans during testing to keep the fan car a secret.

3️⃣ 30 horsepower for the fan 🌬️

The fan, which helped the car stick to the track, used about 30 horsepower from the engine. But the trade-off for the extra speed in corners was worth it!

4️⃣ A Cooling fan… Sort of ❄️

Officially, the fan was for cooling the engine to fit the rules. But let’s be real, its main job was to suck the car onto the track for better grip.

5️⃣ Tank parts in an F1 car? 🚜

The fan had blades originally made from tank parts, which were later upgraded to magnesium for strength.

6️⃣ Lauda and Watson’s sneaky qualifying strategy 🕵️

Niki Lauda and John Watson qualified with full fuel tanks on purpose! They didn’t want to give away how fast the fan car really was.