private static double GetChildHeight(double height, ISpaceCraft spacecraft)
        {
            PropertyInfo          prop  = spacecraft.GetType().GetProperty("GetAeroDynamicProperties");
            AeroDynamicProperties props = (AeroDynamicProperties)prop.GetValue(spacecraft, null);

            if (props == AeroDynamicProperties.ExtendsFineness)
            {
                height += spacecraft.Height;
            }

            foreach (ISpaceCraft child in spacecraft.Children)
            {
                height = GetChildHeight(height, child);
            }

            return(height);
        }