// #include <simgear/timing/timestamp.hxx>
#include <Main/fgfs.hxx>
-#include <Model/acmodel.hxx>
#include <Model/model.hxx>
#include <Main/location.hxx>
SG_USING_STD(vector);
SG_USING_STD(string);
+class FGAircraftModel;
+
typedef double FG_VECTOR_3[3];