_serviceable_node = node->getChild("serviceable", 0, true);
_pressure_node = fgGetNode(_static_pressure.c_str(), true);
_speed_node = node->getChild("indicated-speed-fpm", 0, true);
_serviceable_node = node->getChild("serviceable", 0, true);
_pressure_node = fgGetNode(_static_pressure.c_str(), true);
_speed_node = node->getChild("indicated-speed-fpm", 0, true);