The new OBJ_AIRGEO_WING.N section in the flight_model.cfg misses essential data input.
Setting Wing area, span, and sweep allows for an infinite number of wing planforms. It does not produce the multi-section wing I want it to. It needs one more parameter: root chord, tip chord or aspect ratio. It shows that it takes the root_chord value from the default wing in the [AIRPLANE_GEOMETRY] section. But that does not give a value for the chords of the outer wing section, nor does it automatically adopt that chord. It seems that both wing sections take that same value.
Further, the SDK parameter stallalpha_ff should be stallalphaff (without the underscore)
It is unclear where the position parameters points to (for each wing section): in longitudinal direction: wing LE, 25%MAC, as well as lateral: E.g. the root of an outboard wing section, or the lateral coordinate of the MAC.
And it is also unclear how an outboard wing should be defined: as a half wing (area, span) or a full wing.
Finally the definition of the sweep (angle to aircraft centerline) differs from that of the classic wing_sweep (angle to line perpendicular to aircraft centerline). It seems the SDK text is wrong, and the implementation in the sim is correct.
It seems that this section was specifically written for biplanes….not for multi-section wings.
Unfortunately, the wing I want to do (of a real aircraft…) cannot be done with the normal wing parameters.