This addition brought the total number ofĪirfoils to over 1000. Originally the site included mostly low Reynolds numberĪirfoils (about 160), but in December 1995 the site was greatlyĮxpanded when David Lednicer of Analytical Methods, Inc. The UIUC Airfoil Coordinates Database includes the airfoils, and theyĬover a wide range of applications from low Reynolds numberĪirfoils for UAVs and model aircraft to jet transports and wind Mach number has been left at the default value of zero.The UIUC Airfoil Data Site is a collection of airfoil coordinatesĪnd airfoil related links. Ncrit value is used to model of the turbulence of the fluid or roughness of the airfoil.Ĭurrent repository contains data for average wind tunnel with Ncrit=9 Reynolds number range from 50,000 to 1,000,000 in approximatly logarithmic steps. Systems that operate at the same Reynolds number will have the same flow characteristics even if the fluid, speed and characteristic lengths vary. The Reynolds number is a dimensionless value that measures the ratio of inertial forces to viscous forces and descibes the degree of laminar or turbulent flow. a=1 is the default if no value is given.įor example, the NACA 612-315 a=0.5 has the area of minimum pressure 10% of the chord back, maintains low drag 0.2 above and below the lift coefficient of 0.3, has a maximum thickness of 15% of the chord, and maintains laminar flow over 50% of the chord.
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