A bottle-shaped, low-drag air intake design.
A design for a low restriction air inlet developed by the National Advisory Committee for Aeronautics, it is often seen on race cars, but was also used on the hoods of 1987 Callaway Twin Turbo Corvettes and on some one-off Corvette showcars.
This is an air opening which was named after the National Advisory Committee for Aerodynamics. It was the American organization which developed the kinds of designs for low drag air ducts for jet engines. NACA ducts are used on cars to force air for engine breathing and cooling, for forcing air through the radiators, and for providing fresh air for the passenger compartment.
Cooling inlet channel to carry cooling or ventilation air to a component, using air pressure created by the vehicle's movement.
The NACA duct or NACA scoop is a common form of low-drag intake design, originally developed by the National Advisory Committee for Aeronautics in 1945. When properly implemented, it allows air to be drawn into an internal duct, often for cooling purposes, with a minimal disturbance to the flow. The design was originally called a "submerged inlet," since it consists of a shallow ramp with curved walls recessed into the exposed surface of a streamlined body, such as an aircraft.