Purpose Of A Roof Scoop

Getting back to aerodynamics today i explain how hood scoops and bonnet vents work for road and track.

Purpose of a roof scoop.

In almost every case a large naca duct will provide more than sufficient airflow without increasing drag raising the boundary air thickness or causing turbulent airflow. The main reason for having a roof scoop on a rally car is to actually pressurise the interior of the car slightly. I explain the basics of how the airflow works around. It cools off an appropriate spot when you start to get hot headed.

I have no idea what good a roof scoop could do. Anyone has idea. Hood scoops are for cooling the engine or engine components. This is because there s a negative pressure created by the vacuum bubble behind the trunk.

You ve probably noticed that if your car windows are open fresh air gets sucked in. The only other reasons for a roof scoop are to cool rear mounted heat exchangers radiators or to provide intake air for a rear or mid mounted engine. On a rally race car a small roof scoop creates positive pressure in the cabin pushing dust out of window. This small increase in pressure works wonders to keep out dust and sand from the rally stage.

What are roof scoops for.