Ram Air Hood Scoop Calculator
NACA Ducts may be used in the motorsport industry as a means of providing
efficient air flow to the engine. If a hood scoop is postioned correctly, away
from significantly disturbed airflow, an estimate of the pressure rise may be
calculated by inputting the vehicle speed as below.
Pa = Atmospheric Air Pressure
Density = Air Density
Speed = Vehicle Speed (mph)
The above NACA Duct atmospheric air pressure conditions are taken at International Standard Atmosphere
i.e. (ISA, 15 Deg C, 1.01325 Bar).
The NACA Duct pressure increase needs to be corrected for significantly hotter
or cooler air temperature conditions.
Race Car Engineering and Mechanics, P Van Valkenburgh, ISBN 0-9617425-0-X.