Enhanced Reduced Thrust at takeoffNew Derated and Flexible Takeoff Thrust for up to 40% thrust

reduction

Presented by

Boris HENRYPerformance Engineer

OLM FBW 2006 – Toulouse – 26-28 September 2006

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Enhanced Reduced Thrust at takeoff 2 OLM FBW 2006

Derated take-off (selection of lower take-off rating)

Introduction

Two methods are available to reduce take-off thrust whenperformance permits : Flex take-off (assumed temperature method)

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Tmax

Derate %

TOGA

DERATE

Flex takeoff thrust selection is available on all AIRBUS aircraftDerated takeoff thrust feature is

Standard on Long Range aircraftAn option on Single Aisle aircraft

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Enhanced Reduced Thrust at takeoff 3 OLM FBW 2006

CURRENT STATUS:

• A318/319/320/321 25% Flex – 24% Derate

• A330 25% Flex – 24% Derate

• A340-200/300 25% Flex – 24% Derate

• A340-500/600 40% Flex – 40% Derate

Flexible and Derate levels

Tref TFlex max

THRUST

Flex %

Tmax

Derate %

TOGA

DERATE

PLANNED EVOLUTIONS

• A318/319/320/321 30% or 40% Flex – 30% or 40% Derate(depending on ratings)

• A330 Between 30 and 40% Flex – 24% Derate(depending on ratings)

Introduction

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Enhanced Reduced Thrust at takeoff 4 OLM FBW 2006

Flexible take-off thrust is currently limited down to typically 75% ofthe full rated take-off thrust

It will be extended to reach down to 60% from the full rated take-offthrust in the forthcoming FADEC standards :

FADEC SCN19 for IAE powered A/C

– Availability : Q3 2006

FADEC 5BM for CFM ones

– Availability : Q2 2006

The Flexible Temperature extension is subject to an aircraftmodification

Status on A320 Family / Flexible take-off

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

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Enhanced Reduced Thrust at takeoff 5 OLM FBW 2006

Status on A320 family / Derated take-off

6 levels of fixed derated take-off have been introduced on A320family, covering a range of reduced thrust from 4% to 24% (by stepsof 4%)

This 24% derate capability was implementedIn FADEC 5BL available through MOD 33910 (CFM)

In EEC SCN17 available through MOD 33909 (IAE)

Extension of this capability down to 40%, by addition of a seventhlevel of derate, is planned in the forthcoming FADEC standards.

Other system changes to be considered

Tref TFlex max

THRUST

Tmax

Derate %

TOGA

DERATE

Tref TFlex max

THRUST

Tmax

Derate %

TOGA

DERATE

Tref TFlex max

THRUST

Tmax

Derate %

TOGA

DERATE

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Enhanced Reduced Thrust at takeoff 6 OLM FBW 2006

Status on A320 family / Summary

Required System Changes

Yes(Std I10 or C12)

NoFG

Yes(FWC F3)

NoFWC

Yes(EIS2 S7)

NoDMC

Yes(FMS2 required)

NoFMS

YesYesFADEC

Derated Take-OffFlex Take-Off

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Enhanced Reduced Thrust at takeoff 7 OLM FBW 2006

Status on A320 family / Max Thrust Reduction

30%PW6122A

30%PW6124A30%CFM56-5B9A318

30%V2524-A530%CFM56-5B6

40%V2527M-A540%CFM56-5B7A319

30%CFM56-5B6 (*)

40%V2527(E)-A540%CFM56-5B4A320

40%CFM56-5B4 (*)

40%CFM56-5B1

40%V2530-A540%CFM56-5B2

40%V2533-A540%CFM56-5B3A321

Max ThrustReduction

IAE

Engine rating

Max ThrustReduction

CFM

Engine rating

Aircraft

(*) rating to be certifiedThe same level of reduced thrust will be available through the FLEX temperature

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Enhanced Reduced Thrust at takeoff 8 OLM FBW 2006

Status on A330 aircraft / Flexible take-off

Flexible take-off thrust is currently limited down to typically 75% of the fullrated take-off thrust

It will be extended to reach down to 60% from the full rated take-off thrust inthe forthcoming FADEC standards :

FADEC SCN9 for PW powered A/C– Availability : Q1 2006

FADEC A12.6/A13 for RR powered A/C– Availability : Q3 2006

Current FADEC for GE powered A/C– Availability : Q2 2006

The Flexible Temperature extension is covered by Modification 55212

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

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Enhanced Reduced Thrust at takeoff 9 OLM FBW 2006

Status on A330 aircraft / Flexible take-off

33%

33%

MaxThrust

Reduction(**)

E1A2E1A3

E1A4

GEEngineRating

30%

35%

34%

T772BT772C (*)

39%

37%

PW4168A

PW4164C(*)

MaxThrust

Reduction(**)

RR

EngineRating

MaxThrust

Reduction(**)

PW

EngineRating

(*) rating to be certified

(**) At typical takeoff condition

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

Tref TFlex max

THRUST

Flex %

Tmax

TOGA

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Enhanced Reduced Thrust at takeoff 10 OLM FBW 2006

Flexible Takeoff vs Derate Takeoff

Use of Flexible takeoff thrustWhen performance is not limiting at takeoff, to adapt the thrust to

the actual takeoff weight

Use of Derated takeoff thrustWhen performance is limiting at takeoff, to improve the takeoff

weight

Allowed

(VMC Limitation)Not allowedContaminated

runways

Not allowed

(below maneuvering speeds)AllowedReversion to TOGA

thrust

Derated Take-OffFlex Take-Off

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Enhanced Reduced Thrust at takeoff 11 OLM FBW 2006

Flexible Takeoff vs Derate Takeoff

On short/contaminated runways derated takeoff shall improvetakeoff performance as VMCG limitations are encountered

A321-231 MESSIERSL / ISA / Cf.3 / water 1/2

45000

50000

55000

60000

65000

70000

75000

80000

1200 1300 1400 1500 1600 1700 1800 1900 2000

runway length (m)

MTO

W(K

g)

TOGA

D04

D08

D12

D16

D20

D24* No clearway/stopway* slope 0%* RWY width : 45m* CONF3* ISA, No wind, QNH 1013.25 hPa* Sea level airport* RWY state : Slush 1/4, Slush 1/2, Water 1/4, Water 1/2* Reversers operating on Wet and Conta. runway

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Enhanced Reduced Thrust at takeoff 12 OLM FBW 2006

Conclusion

Flexible takeoff is the standard way to perform a reducedthrust takeoff

Derated takeoff can bring performance improvements onrunway limited dispatch conditions

Enhanced thrust reduction programme has been launched inAirbusMore flexibility for thrust selection

less severe engine operations (lower stress on engine parts)

higher engine reliability

improved maintenance cost via longer engine on-wing life