Tesla’s Crazy 4 Fan Car Patent Revealed For Roadster?

Tesla has received another intriguing patent that could offer clues about the extreme aerodynamic technology being developed behind the scenes. The newly granted United States patent 12,746,987 B1 is titled “Electric Fan Car,” and it describes a system using electric ducted fans to actively manipulate airflow underneath an electric vehicle.

The patent was granted on September 29, 2026, after being filed on January 17, 2024. It also traces back to a provisional application filed on January 17, 2023. The drawings use a Tesla Model S style vehicle to demonstrate how the technology could work, including a striking rear view with 4 circular electric ducted fans positioned across the diffuser.

Instead of relying entirely on conventional aerodynamic surfaces, the system can actively pull air from underneath the vehicle. Air enters through an underbody inlet and is directed through a diffuser before being expelled through outlets at the rear. The patent identifies a suction region beneath the vehicle, with the goal of increasing downforce while also reducing aerodynamic drag.

The fans are connected to the vehicle’s high voltage battery and control system, meaning this is not simply an always running set of blowers. The system could control fan operation according to vehicle conditions, potentially allowing the car to change its aerodynamic behavior when additional grip or stability is needed.

The timing becomes even more interesting when another recent Tesla aerodynamic filing is considered. Patent application US 2026/0285418 A1 describes a sophisticated deployable rear wing. The 2 piece design can remain hidden in the body when it is not needed and then deploy for additional aerodynamic performance. The filing describes up to 700 kilograms of downforce in its high downforce configuration at top speed, while a drag reduction mode can reduce the aerodynamic penalty on straights.

Taken together, these patents show Tesla investigating 2 very different ways of controlling aerodynamic load. Electric fans could potentially create useful downforce without depending entirely on vehicle speed, while an active rear wing becomes increasingly effective as airflow increases.

There is still an important distinction between a patent and a production vehicle. Tesla has not confirmed that these systems will appear together on the next generation Roadster, and the electric fan patent itself uses Model S style drawings. Patents can protect engineering ideas that never reach production.

Even so, the combination gives us an interesting look at the technology Tesla engineers have been developing. If similar ideas eventually reach a production performance car, Tesla could be looking beyond straight line acceleration and toward active aerodynamic systems designed to manage grip, stability, drag, and downforce in real time.