Direction Dependent Cd Coefficients.
If :different drag coefficient, Cd, should be used for different attack angles of the profile, the Direction Dependent Switch has to be set using the HYDROPAR command.
In addition, the direction dependent Cd 's have to be defined using the W_COEFFS and ELMCOEFF commands.
Figure 1 : Visualization of the Direction Dependent Drag Coefficient..
Usfos input files to the actual example are found in the following two files:
=> Usfos Control File
=> Model File