StaticTrim routine fails with Dynamic control surfaces

[ngoiz]

When a control surface is classified as Dynamic (i.e. in the aero.h5 input file control_surface_type[i_cs] = 1), the StaticTrim routine fails because it is unable to change the control surface deflection angle.

Minor impact since you can get the trim condition with the control surface as static first (i.e. control_surface_type[i_cs] = 0) and then run the Dynamic simulation starting from StaticCoupled with the already known trim values. However, this behaviour is worth fixing.