F1 has featured a car that used a fan to generate downforce. https://en.m.wikipedia.org/wiki/Brabham_BT46 https://en.m.wikipedia.org/wiki/Brabham_BT46 An issu

F1 has featured a car that used a fan to generate downforce. https://en.m.wikipedia.org/wiki/Brabham_BT46 https://en.m.wikipedia.org/wiki/Brabham_BT46 An issue with aero features (other than not producing their effects at low speed) is their ability to stall. Ground effect was especially dangerous (back when high-ground-effect designs were allowed) because if it stalls during a high speed corner (say from driving over a bump, like a kerb maybe) you can instantaneously lose a huge amount of downforce, which is obviously quite dangerous.