Active aerodynamics systems adjust the vehicle's aerodynamic profile based on speed, cornering, and cooling requirements. From adaptive rear spoilers that deploy at motorway speeds to active air intakes that close at high speed, these systems optimise the balance between cooling, downforce, and drag reduction. ## Adaptive Rear Spoilers Adaptive rear spoilers extend or adjust angle at higher speeds to increase downforce, improving high-speed stability and handling. At lower speeds, the spoiler retracts to reduce drag and improve efficiency. The system automatically adjusts based on vehicle speed and driving conditions. Sporting vehicles use active spoilers to generate downforce that presses the rear wheels onto the road surface, improving traction during hard cornering and braking. Without a spoiler, the rear of the car can become light at speed, reducing rear tyre grip. The spoiler may also deploy automatically during heavy braking to increase rear downforce and stabilise the vehicle during deceleration. Some systems have multiple positions for different conditions, while others use continuously variable adjustment. Functional rear spoilers also reduce lift at the rear axle, improving straight-line stability at motorway speeds. This reduces the nervous feeling some high-speed vehicles exhibit, making them more relaxing to drive long distances. ## Active Air Management Front air intakes can open and close to control airflow through the engine bay. At motorway speeds, intakes may close to reduce aerodynamic drag and smooth airflow over the front of the car. When cooling is needed, intakes open to allow maximum airflow to radiators and brakes. Brake cooling ducts, common on performance cars and high-performance SUVs, use channels built into the front bumper to direct airflow to brake discs. Active systems can vary the airflow based on brake temperature, reducing drag when brakes are cool and maximising cooling under hard use. Underbody aerodynamics are increasingly important as manufacturers seek to reduce drag and improve efficiency. Some vehicles use flexible panels and active diffusers to manage underbody airflow, reducing turbulence and lift at higher speeds. ## Effects on Fuel Economy and Performance Active aerodynamics can improve fuel economy by 2-5% on motorway journeys by reducing drag. At constant high speed, the reduced drag allows the engine to use less fuel to maintain speed. The improvement is most noticeable on cars with relatively poor aerodynamic efficiency. For performance vehicles, active aerodynamics provide the ability to optimise for different conditions. At the Nürburgring, maximum downforce improves lap times. On the motorway drive home, minimal drag reduces fuel consumption and noise. The same car can excel in both scenarios. The additional weight and complexity of active aerodynamic actuators adds cost and requires maintenance. Motorised actuators, air pumps, and control systems all add potential failure points. However, most active aerodynamic components are designed for the vehicle's lifetime. ## Frequently Asked Questions **Does active aero affect insurance?** Active aerodynamic components are unlikely to significantly affect insurance premiums because they are standard safety and efficiency equipment rather than performance modifications. Modifications to increase downforce beyond factory settings might affect insurance. **Can I retrofit active aerodynamics?** Aftermarket active aerodynamic systems are limited. Most are integrated with the vehicle's electronic control systems and cannot be easily added to vehicles not originally equipped with them. Aftermarket static spoilers and splitters provide some of the visual and aerodynamic benefits. **Do active spoilers deploy automatically?** Yes. Most active spoilers are fully automatic, deploying based on vehicle speed and driving conditions without driver input. Some vehicles allow manual activation through drive modes or individual settings.