A Kammback—also known as a Kamm tail or K-tail—is an automotive styling feature wherein the rear of the car slopes downwards before being abruptly cut off with a vertical or near-vertical surface. A Kammback reduces aerodynamic drag, thus improving efficiency and reducing fuel consumption, while maintaining a practical shape for a vehicle.
Kammback on a 1969 Fiat 850 Coupe
1950 Nash Airflyte
1952 Borgward Hansa 2400
1964-1969 Ford GT40
Automotive aerodynamics is the study of the aerodynamics of road vehicles. Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case. For some classes of racing vehicles, it may also be important to produce downforce to improve traction and thus cornering abilities.
Edmund Rumpler's 1921 Tropfenwagen was the first series-produced aerodynamically designed automobile, before the Chrysler Airflow and the Tatra 77.
Streaklines over a model car
Alloy wheels with covers on a Tesla Model 3
2017 Land Rover Discovery with front air curtains