[HSC]

There are different solutions for unsteady simulations (sinusoidal pitch) when using the restart option.
In the figure you see three different simulations:
1) Lift and drag of the NACA64A012 by using the restart function every time step

2) Lift and drag of the same airfoil by using the internal deformation tool of SU2
3) Lift and drag by using external grid movement BUT single restart at t=0

Why lift and drag are not the same using restart? There is a strong dependancy of the restart solution of the stepsize set in the cfg-file.