According to a United States Patent and Trademark Office filing published on September 24, a new Tesla patent application describes a two-piece active rear wing that hides flush in the bodywork and can generate up to 700 kg of downforce.
Tesla Patent Details Hidden Two-Piece Active Wing Mechanism
The patent filing, designated as application US 2026/0285418 A1 and titled “Deployable and Active Rear Wing Assembly with Safety Features,” was filed in August 2025 by inventors David Lemire and James Michael Arthur Crook. It acts as a continuation of a March 2025 filing that is now listed as abandoned. The aerodynamic hardware consists of two main components: a primary wing element and a smaller leading-edge slat positioned 3 to 15 mm ahead of it.
During standard road driving, the primary element rests flush against the deck lid using a specialized step shape, while the slat tucks securely underneath the rear panel. When activated, the assembly moves upward and backward via a four-bar linkage system, though the filing also notes alternative designs utilizing linear rails and lead screws. Tesla states the mechanism transitions from fully stowed to fully deployed in under three seconds, and adjusts its angle in less than a quarter of a second.
Downforce Figures and Hypercar Performance Comparisons
The headline metric in the filing is the aerodynamic downforce generated at speed. According to the patent documents, the wing produces zero kilograms of downforce in its Drag Reduction System (DRS) mode, but reaches up to 700 kg of downforce in high-downforce mode at top speeds, specifically citing speeds exceeding 100 mph. This output places the hardware squarely in hypercar territory, approaching the 800 kg rating of McLaren’s track-focused Senna.
Deploying the assembly adds 350 drag counts (0.035 Cd) alongside 1,000 counts of downforce. Once extended, rotating the wing flat into the DRS position eliminates 250 counts of drag, allowing a single vehicle to switch between a low-drag road configuration and a high-grip track setup on demand. Non-back-drivable actuators ensure the wing maintains its position under heavy aerodynamic loads without continuously drawing electrical power.
Automated Track Modes and Integrated Safety Retraction
A dedicated wing controller operates the assembly by evaluating speed, acceleration, steering angle, braking inputs, GPS data, and autonomous driving sensor data. The system automatically flattens the wing along straightaways and pivots it into high-downforce positions during hard braking or aggressive cornering. GPS positioning can trigger track mode autonomously upon arrival at a racing circuit.
Because an extended wing introduces clearance risks with trailing traffic, the patent outlines two distinct safety systems designed to protect cyclists and motorcyclists. The first mechanism relies on mechanical latches that release if an impact exceeds a predetermined force threshold, causing the wing to fold back until its trailing edge aligns flush with the rear of the car. The second system is predictive, utilizing vehicle sensors—listed in the filing as cameras, radar, and lidar—to retract the wing ahead of an anticipated rear collision.
Visual Evidence and Roadster Design Speculation
While patent documents typically omit vehicle names, Figures 2A and 2B in the filing illustrate a low-profile fastback 2+2 layout paired with an aggressive rear diffuser. This design shares close visual parallels with the projected shape of the upcoming Tesla Roadster, differing from the 2017 prototype revealed nearly a decade prior. This latest aerodynamic filing follows an August 2024 patent for an underbody duct designed to simultaneously generate downforce and cool the vehicle’s battery pack.
Frequently Asked Questions
When is the Tesla Roadster scheduled to be unveiled?
Tesla has scheduled the Roadster unveiling for October 1 in Texas.
How much downforce can the patented Tesla wing generate?
According to the patent filing, the active rear wing can produce up to 700 kg of downforce at top speeds above 100 mph.
What safety mechanisms are included in the wing design?
The design features a mechanical breakaway system that folds the wing inward upon impact, as well as a predictive retraction system using vehicle sensors to pull the wing back before a suspected rear collision.
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