flight operation 飞行运行概述(35)

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0.84 0.92 1 V1 / VR
ASD
TOD
TOR
TOW = 65 t
D
A project supported by AIRBUS and the CAAC
Date of the module
1 - Take-off speeds
2 - Take-off distances and lengths available
3 - Take-off flight path
4 - Take-off data influence
5 - Maximum allowed take-off weight calculation
6 - Wet and contaminated runway
7 - Flexible take-off
Table of Contents
A project supported by AIRBUS and the CAAC
Date of the module
A project supported by AIRBUS and the CAAC
Date of the module
A project supported by AIRBUS and the CAAC
Date of the module
BR
35 ft
TO distance TO flight path
Take-off path
VEF
Critical
engine
is made
inoperative
AEO OEI
V2
minimum acceleration height = 400 ft
End = the higher of : either
- 1500 ft, or
- the point where en-route configuration is achieved,
with remaining engine(s) at MCT,
and minimum climb gradient at green dot speed.
A project supported by AIRBUS and the CAAC
Date of the module
Generally, the take-off path is divided into
segments :
the segments relate to the distinct changes in the
configuration, thrust and speed
the weight, configuration and thrust must correspond to
the most critical condition prevailing on the segment
the flight path must be based on the aeroplane's
performance without ground effect
The aeroplane is considered to be
out of the ground effect when it
reaches a height equal to its
wing span.
A320 : 111 ft
A project supported by AIRBUS and the CAAC
Date of the module
BR VEF
OEI
Segments :
AEO
35 ft
MAXI TAKE-OFF THRUST
Take-Off
gear
retraction
3s after
Vlof
1
V2
gear fully
retracted
Slats/Flaps
TO position
2
min. 400 ft
3 (acceleration)
flaps
retraction
slats
retraction
(V>1,25 Vs)
Green dot
final
10 mn max
after BR
MCT
1500 ft
At least..!
A project supported by AIRBUS and the CAAC
Date of the module
 Minimum required climb gradient OEI
(FAR-JAR § 25-121)
The most limiting condition is often due to the 2nd segment
Nb of engines 2 3 4
1st segment >0% 0.3% 0.5%
2nd segment 2.4% 2.7% 3%
final segment 1.2% 1.5% 1.7%
A project supported by AIRBUS and the CAAC
Date of the module
A project supported by AIRBUS and the CAAC
Date of the module
1 - Take-off speeds
2 - Take-off distances and lengths available
3 - Take-off flight path
4 - Take-off data influence
5 - Maximum allowed take-off weight calculation
6 - Wet and contaminated runway
7 - Flexible take-off
Table of Contents
A project supported by AIRBUS and the CAAC
Date of the module
 Sustained parameters  Chosen parameters
Zp and temperature
Influence on engines
and airspeed
A project supported by AIRBUS and the CAAC
Date of the module
15000
16000
17000
18000
19000
20000
21000
22000
23000
-10 -5 0 5 10 15 20 25 30 35 40
Zp = 0
Zp = 2000
Zp = 8000
daN CF6-50A
t°
Flat rating
temperature
Maximum Take-off thrust
A project supported by AIRBUS and the CAAC
Date of the module
 mg = L = ½  S Va² CL
 Va   The take off distances
increase
  when Zp or T°C 
A project supported by AIRBUS and the CAAC
Date of the module
 Sustained parameters
 Zp and t°C
 Wind
 Head: 50% of effect
 Chosen parameters
Air Speed
Ground Speed
Wind
TO Distances 
A project supported by AIRBUS and the CAAC
Date of the module
 Sustained parameters
 Zp and t°C
 Wind
 Head: 50% of effect
 Tail: 150% of effect
 Chosen parameters
Ground Speed
Air Speed wind
TO Distances 
Max : 10kt (actual)
A project supported by AIRBUS and the CAAC
Date of the module
 Sustained parameters
 Zp and t°C
 Wind
 Runway slope
 -2% < slope < +2%
 Chosen parameters
slope < 0  take-off distance 
± 2 %
slope > 0  take-off distance 
(downwards) (upwards)
A project supported by AIRBUS and the CAAC
　
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