The aerodynamic test methods also apply to Hydrodynamic. However, two principles related to liquids must be understood: the cavitation and Ventilation .

The airfoil shapes are tested in Wind tunnels . From these wind tunnel tests, the lift coefficients and drag coefficients of profiles are computed. parameters of the experiment are stored in databases.

When you want to design a wing ,A Sail,A keel dagger board rudder, or any other object whose lift force and drag force is important, it is useful to refer to the database to select a profile that met the basic qualities that we look forward to reinvent the wheel.

maximum thickness / chord = relative thickness

camber or arrow = maximum distance between the chord line and the average center line of the profile

• The lift but also drag Profile increases with its camber and thickness
• The thin profiles and weak arches have a better Cl/Cd ratio but less resistance.

A method of geometrical construction of profiles according to a mathematical equation was developed by the NACA.

The famous NACA profiles are built from the digits of their denomination. Mecaflux contains a profile editor NACA 4-DIGIT which allows you to easily create a file of coordinates and drawing the profile, by varying the profile DIGITS, with a cursor:

Calculations of profiles AERODYNAMIC OR HYDRODYNAMIC, lift force and drag force With Mecaflux

• you can use profiles already built into MECAFLUX ( you just have to choose your profile )

and set the speed, the fluid, the incidence and length of the chord for computing the lift force and drag force.

• Or you can create your profile according to your own tables and polar coordinates with the profile editor integrated in Mecaflux, and then export your files to solidworks : create a file of your 3d wing