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TAKEOFF PERFORMANCE
TAKEOFF PERFORMANCE
Applicable to:
Takeoff optimization is calculated for a given runway and its obstacles and for given conditions of
flap setting, temperature, wind and QNH. The calculation produces a maximum permissible takeoff
weight (or a maximum takeoff temperature for an actual weight).
The takeoff thrust produced by the engines varies as follows :
The optimization process calculates the speeds which will produce the maximum takeoff weight.
To do so, it takes into account the different takeoff limitations such as TOD, ASD, TOR, second
segment..., as shown on the graphs below.
On a typical runway, the performance of a four engine aircraft is generally limited by the all engine
operation at takeoff. The optimum V2/VS is close to the minimum value and there is usually a usable
range of V1/VR (and consequently a usable range of V1).
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - GENERAL (TEMPERATURE ENTRY)
A330/A340 FLEET PER-TOF-TOC-10-10 P 2/2
FCOM 19 AUG 10
TAKEOFF PERFORMANCE
Applicable to: ,
Takeoff optimization is calculated for a given runway and its obstacles and for given conditions of
flap setting, temperature, wind and QNH. The calculation produces a maximum permissible takeoff
weight (or a maximum takeoff temperature for an actual weight).
The takeoff thrust produced by the engines varies as follows :
The optimization process calculates the speeds which will produce the maximum takeoff weight.
To do so, it takes into account the different takeoff limitations such as TOD, ASD, TOR, second
segment..., as shown on the graphs below.
On a typical runway, the performance of a twin engine aircraft is generally limited by the all engine
operation at takeoff. The optimum V2/VS and optimum V1/VR are consequently unique.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - GENERAL (TEMPERATURE ENTRY)
A330/A340 FLEET PER-TOF-TOC-10-20 P 1/2
FCOM 19 AUG 10
TAKEOFF CHART DESCRIPTION
GENERAL
Applicable to: ALL
The takeoff chart (RTOW : Regulatory TakeOff Weight) is calculated for a specific aircraft version
and for a particular runway specified at the top of the chart. The top of the chart also gives some
information about the runway and lists the calculation assumptions.
The chart is given for 2 different configurations and 5 wind values per configuration. This allows the
crew to select the configuration that gives either :
the highest permissible takeoff ‐ weight, or, for a given weight,
‐ the highest flexible temperature.
If different configurations give equivalent performance, the crew should select the configuration
associated with the lowest takeoff speeds.
For each temperature value (and for a given configuration and wind), the chart provides the following
information :
The available limitation codes are :
‐ First segment : 1
‐ Second segment : 2
‐ Runway length : 3
‐ Obstacles : 4
‐ Tire speed : 5
‐ Brake energy : 6
‐ Maximum computation weight : 7
‐ Final takeoff : 8
‐ VMU : 9
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - GENERAL (TEMPERATURE ENTRY)
A330/A340 FLEET PER-TOF-TOC-10-20 P 2/2
FCOM 19 AUG 10
CORRECTIONS DUE TO DIFFERENT TAKEOFF CONDITIONS
Applicable to: ALL
Each takeoff chart is computed for a given set of conditions (air conditioning, QNH, anti ice...)
specified at the top of the chart. If the actual takeoff conditions are different the crew must apply
corrections. Two types of corrections are available :
‐ Conservative corrections Refer to PER-TOF-TOD-24 EFFECT OF QNH AND BLEEDS (to be used
when not provided on the chart).
‐ Corrections (less restrictive) listed on the chart, to be applied as explained below.
DESCRIPTION OF THE CORRECTIONS ON TAKEOFF CHART
Applicable to: ALL
The corrections are presented on 4 lines :
TVMC is a temperature value given per column. This is a fictitious value that indicates the
temperature above which the speeds are close to a VMC limitation or are VMC limited.
Note: The lower two lines may be shaded on certain chart formats.
MINIMUM SPEEDS
Applicable to: ALL
Minimum V1/VR/V2 due to VMC are provided on the bottom right side of the takeoff chart.
They are only applicable in case of speed corrections.
These speeds are conservative. They may be slightly higher then V1/VR/V2 displayed in the takeoff
chart.
FLEX TEMPERATURE INDICATOR
Applicable to: ALL
On the temperature entry chart, the temperature column may display asterisks or have a grey band
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 6(16)
