Flight envelope display

12-0429-AU FLIGHT ENVELOPE DISPLAY 5 A method and apparatus for displaying aircraft performance characteristics. A two-dimensional representation of a flight envelope (202) for an aircraft is displayed. The two-dimensional representation of the flight envelope (202) comprises a display of speed versus altitude 10 performance capabilities of the aircraft. A current speed and a current altitude of the aircraft are identified. A performance indication (204) of the current speed and the current altitude is displayed on the two-dimensional representation of the flight envelope (202). A position of 15 the performance indication (204) on the two-dimensional representation of the flight envelope indicates the current speed and the current altitude with respect to the flight envelope (202). PERFORMANCE AIRCRAFT CONFIGURATION 141 IDENTIFICATION AR F IDENTIFICATION 116 SYSTEMS 102 SYSTEMS CURRENT PERFORMANCE CURRENT 108 PERFORMANCE DISPLAY CONFIGURATION 104 IDENTIFIER SYSTEM IDENTIFIER _ CURRENT PERFORMANCE CURRENT CONFIGURATION 13 2 112 FLAP 114 CONFIGURATION 134 AUDE 128 136 TN E 106 PERFORMANCE ENVELOPE SELECTOR 13 8 BANGLE PERFORMANCE ENVELOPE 140 PERFORMANCE 119 CAPABILITIES DISPLAY FLIGHT 110 GENERATOR ENVELOPE 122 DISPLAY TURN RATE DISPLAYENVELOPE 1 24 TWO-DIMENSIONAL 118 ENVELOPEk_ 12 REPRESENTATION 144 OF PERFORMANCE TPHREOLD OF ENVELOPE CAPABILITES 12 PERFORMANCE 142 146-/I INDICATION WARNING PERFORMANCE 148 __ INDICATION CAPABILITIES 120 DATABASE FLIGHT DECK DISPLAY 150 ISPAYDEVICE 152