Fuel-cell emergency power system

摘要

Liebherr-Aerospace has developed a fuel-cell emergency power system (FCEPS) as an alternative to a ram air turbine (RAT). Because of the way the RAT is designed, the amount of power it generates depends directly on the speed of the aircraft; if the aircraft slows, the system will produce less power. In the final approach phase, the power output drops to zero. The FCEPS is fully integrated in the aircraft fuselage and as a result is not dependent on external airflow or weather conditions and does not produce any aerodynamic drag, according to Liebherr.