Modern aircraft are built to meet strict standards set by national and international authorities, ensuring safety and reliability. These standards align with the International Civil Aviation Organisation (ICAO) Annex 8, which focuses on airworthiness. In Europe, the European Aviation Safety Agency (EASA) regulates aircraft design. Manufacturers provide detailed performance information in the Aeroplane Flight Manual (AFM), including the necessary operating techniques to achieve the stated performance. It’s crucial for aircraft to operate safely throughout their flight, managing specified malfunctions like engine failures effectively.
Take-off and landing performance are vital aspects of aircraft operation. The maximum mass at take-off is determined by factors such as aircraft type, runway elevation, length, slope, braking action, and weather conditions. Aircraft must be capable of maintaining minimum climb rates after take-off while using full power, even if one engine fails. If an engine failure occurs during the take-off run, the pilot has two options: stop safely within the runway length or continue the take-off, ensuring clearance over obstacles during the climb-out. Furthermore, the aircraft must be able to fly safely with one engine inoperative, returning to the departure airport, proceeding to the destination, or diverting to an alternate airfield while avoiding terrain hazards.
To achieve these performance metrics, pilots must adhere to specific operating techniques. This includes flying the aircraft in designated configurations, power settings, and speeds based on the actual weight during take-off, initial climb, approach, and landing. Configuration refers to factors like the number of engines running and whether flaps, landing gear, or speed brakes are deployed.
En-route performance is also critical. Manufacturers indicate the maximum operating altitude where full power is available and the capabilities when one or more engines are inoperative. They publish data on climb, cruise, and descent for various operational techniques across all allowable altitudes and temperatures. This data includes power settings, indicated airspeed or Mach number, true airspeed, and fuel consumption.
