Additionally, the present invention affords several simplifications in aircraft apparatus in comparison with that required when two separate units are employed to provide the functions of supplying auxiliary power and {HEAD ~ emergency power} to {TAIL ~ the aircraft} 
Additionally , the present invention affords several simplifications in aircraft apparatus in comparison with that required when two separate units are employed to provide the functions of supplying auxiliary power and { HEAD ~ emergency power } to { TAIL ~ the aircraft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL