Deep snow on a roof can bury a gas appliance flue causing the exhaust to enter the home.
Reasons for scoop on roof.
This small increase in pressure works wonders to keep out dust and sand from the rally stage.
Also available separately from the roof scoop is the mclaren track telemetry option ready to record your every action.
Any dust floating around the cabin will seriously inpeed the driver s vision and make it much harder for the co d.
This condition can introduce carbon monoxide a colorless odorless poisonous gas in the building.
Excess snow on the roof can weaken and potentially collapse a structure particularly an older building with a shallow pitched roof.
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.
Due to its location the air enters clean with no dust and it contributes to keeping the temperature down as well as to keep positive pressure inside the cockpit preventing dust from entering by other car openings.
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.
Closed hood scoops are for the most part decorative but can offer increased aerodynamics and hence better fuel efficiency and speed at least in theory.
The main reason for having a roof scoop on a rally car is to actually pressurise the interior of the car slightly.