1 A320 Takeoff Performance-1

Takeoff Performance

Takeoff Airbus A320 – Performance Course

Takeoff Performance 1

MTOW Flexible Takeoff

2

Contaminated Takeoff

Airbus A320 – Performance Course

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RTOW Charts RTOW charts enable to: Determine a MTOW and its associated takeoff speeds Determine a flexible temperature

MTOW V1, VR, V2 Tflex

Airbus A320 – Performance Course

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Description of Takeoff Chart

Airbus A320 – Performance Course

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Description of Takeoff Chart

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Description of Takeoff Chart

Airbus A320 – Performance Course

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Description of the Corrections

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Airbus A320 – Performance Course

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Example 1: MTOW OAT

= 44°C

Wind

= Calm

Air Conditioning = ON QNH

= 1003 hPa

Rwy Condition

= DRY

MTOW

=?

Airbus A320 – Performance Course

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Solution

CONF 1+F, 0 kt, 44 °C MTOW = 78.2 T

Airbus A320 – Performance Course

CONF 2, 0 kt, 44 °C MTOW = 78.7 T

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Solution: FCOM Correction

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING A/C ON Intermediate Values

Conf 2

78.2

78.7

-1.8

-1.8

76.4 No speed correction

76.9 No speed correction

QNH Final Values

Airbus A320 – Performance Course

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CONF 1+F

MTOW = 76.4 T

Airbus A320 – Performance Course

CONF 2

MTOW = 76.9 T

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Solution Conf 1+F CHART READING A/C ON Intermediate Values

Conf 2

78.2

78.7

-1.8

-1.8

76.4 153/53/55

76.9 150/51/55

QNH Final Values

Airbus A320 – Performance Course

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OAT ≤ TVMC

44°C ≤ 61°C Line 1 & 2

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING

Conf 2

78.2

78.7

-1.8

-1.8

Intermediate Values

76.4 153/53/55

76.9 150/51/55

QNH

-0.7/ -2 -1/ -1/ -1

-0.7/ -2 0/ 0/ -1

Final Values

75.7 152/52/54

76.2 150/51/54

A/C ON

Airbus A320 – Performance Course

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Determining Airport Pressure Altitude Airport elevation

= 489 ft

QNH

= 1003 hPa

Pressure altitude correction = +300 ft Airport pressure altitude

= 789 ft

Ref: QRH - PER In Flight Performance - PER Miscellaneous Airbus A320 – Performance Course

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Check V2 & VMU

Conf 1+F 75.7 152/52/54

Conf 2 76.2 150/51/54

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Result Conf 1+F

Final Values

75.7 152/52/54

Check Min V1/VR/V2 Check V2 limited by VMU

Airbus A320 – Performance Course

Conf 2 76.2 150/51/54

MTOW = 76.2 T 150/51/54 CONF 2

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MTOW Determination

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MTOW Determination

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Example 2: MTOW OAT

= 25°C

Wind

= 10 kt

Air Conditioning = ON QNH

= 998 hPa

Rwy Condition

= Wet

MTOW

=?

Airbus A320 – Performance Course

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Solution

CONF 1+F, 10 kt, 25 °C MTOW = 80.6+0.46x1+0.06x19 = 82.2 T

CONF 2, 10 kt, 25 °C MTOW = 80.3+0.47x2+0.05x19 = 82.1 T Airbus A320 – Performance Course

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Solution: FCOM Correction

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING

A/C ON Intermediate Values

Conf 2

82.2

82.1

-1.8

-1.8

80.4 155/56/58

80.3 152/53/58

WET Intermediate Values QNH Final Values Airbus A320 – Performance Course

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Solution: WET Correction

OAT ≤ TVMC

25°C ≤ 69°C Line 1 & 2

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING

Conf 2

82.2

82.1

-1.8

-1.8

Intermediate Values

80.4 155/56/58

80.3 152/53/58

WET

-0.7/ -2 -8/ -2/ -2

-0.2/ -1 -5/ 0/ 0

Intermediate Values

79.7 147/54/56

80.1 147/53/58

A/C ON

QNH Final Values Airbus A320 – Performance Course

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Solution: QNH Correction

OAT ≤ TVMC

25°C ≤ 61°C Line 1 & 2

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING

Conf 2

82.2

82.1

-1.8

-1.8

Intermediate Values

80.4 155/56/58

80.3 152/53/58

WET

-0.7/ -2 -8/ -2/ -2

-0.2/ -1 -5/ 0/ 0

Intermediate Values

79.7 147/54/56

80.1 147/53/58

QNH

-0.7*1.5/ -2 -1*1.5/ -1*1.5/ -1*1.5

-0.7*1.5/ -2 0*1.5/ 0*1.5/ -1*1.5

Final Values

78.6 145/53/55

79 147/53/57

A/C ON

Airbus A320 – Performance Course

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Determining Airport Pressure Altitude Airport elevation

= 489 ft

QNH

= 998 hPa

Pressure altitude correction = +400 ft Airport pressure altitude

= 889 ft

Ref: QRH - PER In Flight Performance - PER Miscellaneous Airbus A320 – Performance Course

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Check V2 & VMU

Conf 1+F 78.6 145/53/55

Conf 2 79 147/53/57

Airbus A320 – Performance Course

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Result Conf 1+F

Final Values

78.6 145/53/55

Check Min V1/VR/V2 Check V2 limited by VMU

Airbus A320 – Performance Course

Conf 2 79 147/53/57

MTOW = 79 T 147/53/57 CONF 2

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Example 3: MTOW OAT

= 55°C

Wind

= -10 kt

Air Conditioning

= ON

QNH

= 1023 hPa

Runway Condition

= DRY

MTOW

=?

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OAT > TMAX

55°C > 54°C

X

NO TAKEOFF!!!

Airbus A320 – Performance Course

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Summary:MTOW

Airbus A320 – Performance Course

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Flexible Temperature

Airbus A320 – Performance Course

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Thrust-Temperature AMJ 25-13 ; AC 25-13 Flex Takeoff: what for?

Weight Max TOW

Actual TOW

Thrust

Available Thrust

To enable takeoff without engines at full rate reduces: • the probability of a failure (safety aspect) • the engine deterioration rate and associated maintenance costs (economic aspect)

Flat rated Thrust EGT Limit

Required Thrust

OAT Airbus A320 – Performance Course

Tref

Flex Temp 37/71

T

Flexible Temperature & Tref-OAT

Airbus A320 – Performance Course

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Recommendation

Airbus A320 – Performance Course

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Notes:

Airbus A320 – Performance Course

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Notes:

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Notes:

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Airbus A320 – Performance Course

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Example 4: Flexible Temperature Actual Takeoff Weight = 68 000 kg OAT

= 25°C

Head Wind

= 10 kt

Air Conditioning

= ON

QNH

= 998 hPa

Runway Condition

= WET

Flex Temperature

=?

Airbus A320 – Performance Course

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Solution Conf 1+F CHART READING

Conf 2

82.2

82.1

-1.8

-1.8

Intermediate Values

80.4 155/56/58

80.3 152/53/58

WET

-0.7/ -2 -8/ -2/ -2

-0.2/ -1 -5/ 0/ 0

Intermediate Values

79.7 147/54/56

80.1 147/53/58

QNH

-0.7*1.5/ -2 -1*1.5/ -1*1.5/ -1*1.5

-0.7*1.5/ -2 0*1.5/ 0*1.5/ -1*1.5

Final Values

78.6 145/53/55

79 147/53/57

A/C ON

Airbus A320 – Performance Course

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Solution: ATOW & MTOW Check that the speeds are higher than minimum speeds from the chart and from VMU table. (It is reminded that if the speed checks are not fulfilled, the corrections must be recalculated using those provided on lines 3 and 4). Since the speed check is fulfilled: Conf 1+F

Final Values

78.6 145/53/55

Conf 2

79 147/53/57

Actual Takeoff Weight = 68 T

Airbus A320 – Performance Course

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Solution

Actual Takeoff Weight = 68 T Conf 1+F

Conf 2

67°C

66°C

Flexible Temperature

Airbus A320 – Performance Course

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Solution Conf 1+F FLEX TEMPERATURE (chart reading)

67°C 153/53/54

Conf 2 66°C 149/49/53

A/C ON

Intermediate Values WET Intermediate Values QNH Final Values Airbus A320 – Performance Course

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Solution: FCOM Correction

Airbus A320 – Performance Course

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Solution Conf 1+F

Conf 2

67°C 153/53/54

66°C 149/49/53

A/C ON

-3°C No speed correction

-3°C No speed correction

Intermediate Values

64°C 153/53/54

63°C 149/49/53

FLEX TEMPERATURE (chart reading)

WET Intermediate Values QNH Final Values Airbus A320 – Performance Course

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Solution: WET Correction

Conf 1+F

Tflex ≤ TVMC

64°C ≤ 69°C Line 1 & 2

Conf 2

Tflex ≤ TVMC Airbus A320 – Performance Course

63°C ≤ 69°C 51/71

Solution Conf 1+F

Conf 2

67°C 153/53/54

66°C 149/49/53

A/C ON

-3°C No speed correction

-3°C No speed correction

Intermediate Values

64°C 153/53/54

63°C 149/49/53

WET

-0.7/ -2 -8/ -2/ -2

-0.2/ -1 -5/ 0/ 0

Intermediate Values

62°C 145/51/52

62°C 144/49/53

FLEX TEMPERATURE (chart reading)

QNH Final Values Airbus A320 – Performance Course

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Solution: QNH Correction

Conf 1+F

Tflex > TVMC

62°C > 61°C Line 3 & 4

Conf 2

Tflex > TVMC Airbus A320 – Performance Course

62°C > 61°C 53/71

Solution Conf 1+F

Conf 2

67°C 153/53/54

66°C 149/49/53

A/C ON

-3°C No speed correction

-3°C No speed correction

Intermediate Values

64°C 153/53/54

63°C 149/49/53

WET

-0.7/ -2 -8/ -2/ -2

-0.2/ -1 -5/ 0/ 0

Intermediate Values

62°C 145/51/52

62°C 144/49/53

QNH

-0.7/ -2*1.5 No speed correction

-0.7/ -2*1.5 No speed correction

Final Values

59°C 145/51/52

59°C 144/49/53

FLEX TEMPERATURE (chart reading)

Airbus A320 – Performance Course

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Determining Airport Pressure Altitude Airport elevation

= 489 ft

QNH

= 998 hPa

Pressure altitude correction = +400 ft Airport pressure altitude

= 889 ft

Ref: QRH - PER In Flight Performance - PER Miscellaneous Airbus A320 – Performance Course

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Check V2 & VMU

Conf 1+F 59°C 145/51/52

Conf 2 59°C 144/49/53

Airbus A320 – Performance Course

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Result Conf 1+F 59°C 145/51/52

Final Values

Check Min. speeds Check V2 limited by VMU Check that: OAT ≤ Tmax Tflex ≤ Tflex,max Tflex > OAT

Conf 2 59°C 144/49/53

Retain CONF 2 when flexible temperature difference between two flap settings is low, use the highest flap setting. RECOMMENDATION

Tflex > Tref Airbus A320 – Performance Course

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Summary:FLEX

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Takeoff Performance 1

MTOW Flexible Takeoff

2

Contaminated Takeoff

Airbus A320 – Performance Course

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Definitions

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Definitions any depth 101.6 mm

Wet runway corrections 50.8 mm

25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

3 mm Dry Snow

Compacted Snow 61/71

Definitions any depth

Contaminated runway corrections

101.6 mm

B. 12.7mm (1/2 inch) water 50.8 mm

A. 6.3 mm (1/4 inch) water 25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

4 3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

15 3 mm Dry Snow

Compacted Snow

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Definitions any depth

Contaminated runway corrections

101.6 mm

C. 6.3 mm (1/4 inch) slush 50.8 mm

25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

4 3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

15 3 mm Dry Snow

Compacted Snow

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Definitions any depth

Contaminated runway corrections

101.6 mm

D. 12.7mm (1/2 inch) slush 50.8 mm

25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

4 3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

15 3 mm Dry Snow

Compacted Snow

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Definitions any depth

Contaminated runway corrections

101.6 mm

E. Compacted snow 50.8 mm

25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

4 3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

15 3 mm Dry Snow

Compacted Snow

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Definitions any depth 101.6 mm

50.8 mm

25.4 mm

12.7 mm

12.7mm

12.7 mm

6.3 mm 3 mm

6.3mm 3 mm

4 3 mm

Standing Water

Slush

Wet Snow

Airbus A320 – Performance Course

15 3 mm Dry Snow

Compacted Snow

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Example 5: Contaminated TOW Runway length = 3 000 m (no clearway) OAT

= 5°C

Wind

= 5 kt Tail Wind

Runways Status = 8 mm slush CONF 1+F

Airbus A320 – Performance Course

TOW V1/VR/V2

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?

Solution: MTOW

MTOW on dry runway = 80+4x0.05 = 80.2 T

Airbus A320 – Performance Course

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Solution

Corrected weight = 80 200 – 14 700 = 65 500 kg Determine maximum takeoff weight and associated speeds: Airbus A320 – Performance Course

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Result

MTOW = 65 500 kg V1 = 141 kt, VR = 147 kt, V2 = 148 kt

Airbus A320 – Performance Course

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Airbus A320 – Performance Course

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