Tesla Roadster isn't the first car with downforce fans

The Tesla Roadster is getting attention for using fans to create downforce, but it is far from the first vehicle to do so. Engadget notes that several older cars have used fans in a similar way, which shows how engineers across the automotive world keep revisiting the same core problem: how to keep a vehicle planted at speed. For those working in automotive design, aerodynamics or hardware development, the lesson is that a concept can be overlooked for years and still become relevant again as tools, materials and priorities change. It also highlights the value of studying past projects, since older solutions can offer useful starting points for modern electric vehicles. Are you seeing old engineering ideas return in your own field?