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Clean Sky at a Glance

Engine ViewpointDr. Simon Weeks

Head of Aerospace Research & Technology , Rolls-Royce plc

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Investment in Engine Achitectures and Technology is Key

To Improving Fuel Efficiency and Reducing CO2

Conway

RB211

Trent 700/800

Trent 1000

Engine Fuel

Consumption

High Bypass

Ratio Turbofans

Low Bypass

Ratio Turbofans

Turbojets

(No Bypass Duct)

Avon

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Rolls-Royce data

Investment in Engine Architectures and in

technology have dramatically reduced noise

Turbojet

Low bypass ratio turbofan

High bypass ratio turbo fan

Avon

Conway

Spey

RB211-535 Tay

V2500-524G/H

Trent

1960 1970 1980 1990 2000Entry into service

75%

reduction

Total aircraft noise - Rolls-Royce engines

� Communities local to

airports are worst

affected due to take off

and landing manoeuvres

� International and

particularly local

regulation impose very

stringent limits

� Reductions in aircraft

noise have been largely

offset by increased

traffic and aircraft size

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Big Technical Challenges

Vision 2020 and Flightpath 2050 targets are for new aircraft and

whole industry relative to 2000

Reduce fuel

consumption and

CO2 emissions by

• 50% by 2020

•75% by 2050

Reduce NOX

emissions by

•80% by 2020

•90% by 2050

Reduce perceived

external noise by

•50% by 2020

•65% by 2050

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Future Engine Architectures and Applications

Advanced Large

High Bypass

Ratio Turbofan

Open Rotor

Geared Turbofan

Advanced

Turboshaft

Advanced Aero-

Diesel

Large widebody

Middle of

the Market

Regional

Rotorcraft &

General

Aviation

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SAGE ITD – 5 Concepts, 5 Demonstrations

422M€ Programme

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Advanced Turboshaft

Efficient

Turbo-machinery

Advanced Turboshaft

Efficient

Turbo-machinery

Large Turbofan

Lightweight Materials &

Structures

Large Turbofan

Lightweight Materials &

Structures

Open Rotor & Geared Tubofan

Very High Bypass Ratio Engine

Architectures

Open Rotor & Geared Tubofan

Very High Bypass Ratio Engine

Architectures

SAGE – Innovative Solutions

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Significant Progress on Open Rotor Technology

Rig Testing –

Aerodynamics &

Noise

Design &

Integration

studies

Modelling

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Rig Results show that

Open Rotors can be quieter than today’s turbofans

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Progressing from Technology to Demonstration

Design Studies, Rig

Testing, Modelling

Whole Engine

Demonstrators

Flying

Demonstrators

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Clean Sky is part of the Journey....

Company Own Funded ProgrammesCompany Own Funded Programmes

National ProgrammesNational Programmes

Clean SkyClean Sky

FP7 Level 0-2FP7 Level 0-2

Progressing to Vision 2020 TRL6Progressing to Vision 2020 TRL6 Progressing to Flightpath 2050 TRL6Progressing to Flightpath 2050 TRL6

There is more to do in addition to Clean Sky to get to VISION 2020

Flightpath 2050 is even more challenging !

There is more to do in addition to Clean Sky to get to VISION 2020

Flightpath 2050 is even more challenging !

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Clean Sky Engines Summary

• Investment in new engine architectures & technology is key to

meeting future environmental challenges

• SAGE in Clean Sky is addressing the challenges through 5

Engine Concepts

• The ‘Open Rotor’ concept is the biggest technology step for

engines and aircraft for reducing CO2 emissions

• We have made significant advances across the front of new

technologies in Clean sky, reducing technical risk

• We are now progressing the 5 concept demonstrator designs

in parallel with the technology programmes

• Engine technologies take many years to develop and verify.

Clean Sky is part of the journey – we will need to do more to

get to Vision 2020 – and ultimately Flightpath 2050