This document discusses sustainability in aviation. It outlines how the aviation industry has improved fuel efficiency and reduced emissions over time through technology innovations like higher bypass ratio turbofan engines and new geared turbofan engines. These efficiency gains are part of a comprehensive sustainability approach in aviation that also includes the use of biofuels and other programs aimed at reducing noise and emissions. The document argues that continued investment in technology innovation will be key to further improving sustainability in the aviation industry.

1. Sustainability in Aviation
Palash Roy Chowdhury
Managing Director, India
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2. sus·tain·abil·i·ty
Development that meets the needs of the present without
compromising the ability of future generations to meet their
own needs
Brundtland Commission
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4. Aeronautical Challenges in 1911
75% Reduction
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5. Aviation’s Runway to an Improved Environment
75% Reduction
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6. Evolution in By-Pass Ratio & Efficiency
Turbojet – B-707 (JT3C)
Low bypass Turbofan B-727 (JT8D)
High Bypass Turbofan B-747 (JT9D)
High Bypass Turbofan A-320 (V2500)
• Lower fuel consumption so
- Lower CO2
- Lower NOx
- Lower Cost
GTFTM Engine
Ultra high bypass
1950 1960 1970 1980 1990 2000 2010 2020
Engine certification date
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7. Geared Turbofan: Step Change in Efficiency
Conventional Turbofan PurePower™ GTF Engine
ultra-efficient,
fan speed constrained by low compressor & low turbine light-weight, low compressor & low turbine
low pressure spool speed constrained by fan low-speed fan speed optimized
bypass airflow
bypass airflow
Gear
bypass airflow
bypass airflow
Incremental Step-Change
Improvement Improvement
fuel maint. noise
• This Page Contains no Technical Data
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8. Investment in Technology Innovation
25 Years to PurePower® Engines
40K Demo engine 11K Demo engine 30K Flight demos Entry Into Service
1990 2000 2008 2013
Flight weight design Gear Test Rigs 30K Ground demo Entry Into Service
Thrust in thousands of pounds (K)
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10. PurePower® Engine Significantly Reduces Noise
77% Reduction at LaGuardia (LGA)
LaGuardia Noise Footprint LaGuardia Noise Footprint
Existing turbofan PurePower® PW1000G Engine
SEL Contour Source: Wyle Laboratories
FAA INM Version 6.2a
Noise Simulation: Pratt & Whitney
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Source: Wyle Lab Analyses

11. A Comprehensive Approach
Bio fuels EcoPower ® - Engine Wash
EcoFlight TM - Flight operations
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Source: Wyle Lab Analyses

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