_static_pressure_node = fgGetNode(static_port.c_str(), true);
_density_node = fgGetNode("/environment/density-slugft3", true);
_speed_node = node->getChild("indicated-speed-kt", 0, true);
_static_pressure_node = fgGetNode(static_port.c_str(), true);
_density_node = fgGetNode("/environment/density-slugft3", true);
_speed_node = node->getChild("indicated-speed-kt", 0, true);