National Aeronautics and Space Administration

www.nasa.gov

NASA’s approach for quiet and efficient subsonic air transportation

Prepared for Lynne Pickard, FAAAugust, 2010

Fayette Collier, Ph.D., M.B.A.Project ManagerEnvironmentally Responsible Aviation(ERA) Project, NASA

ERA Goals, Objectives & System Level MetricsOver the next 5 years:

• Goal – develop and mature technology/advanced aircraft designs that SIMULTANEOUSLY meet community noise, fuel burn, and NOX emission midterm goals as described in the National Aeronautics R & D Plan

– Determine potential impact of these aircraft designs and technologies if successfully implemented into the Air Transportation System

– Determine potential impact of these technologies on advanced “tube and wing” designs

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Noise(cum below Stage 4)

-60% -75% better than -75%

-33% -50%** better than -70%

-33% -50% exploit metro-plex* concepts

N+1 = 2015***Technology Benefits RelativeTo a Single Aisle Reference

Configuration

N+2 = 2020***Technology Benefits Relative

To a Large Twin Aisle Reference Configuration

N+3 = 2025***Technology Benefits

LTO NOx Emissions (below CAEP 6)

Performance:Aircraft Fuel Burn

Performance:Field Length

-32 dB -42 dB -71 dB

CORNERS OF THE TRADE SPACE

***Technology Readiness Level for key technologies = 4-6. ERA will undertake a time phased approach, TRL 6 by 2015 for “long-pole” technologies** RECENTLY UPDATED. Additional gains may be possible through operational improvements* Concepts that enable optimal use of runways at multiple airports within the metropolitan area

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Technology “Collectors”Assessing Technology Benefits

Advanced Tube and WingModerate noise and fuel burn reductions possible

Hybrid Wing BodySignificant noise and fuel burn reductions possible

• Potential ERA airframe and engine technology packages installed on both traditional and advanced configurations

• Fuel burn, noise and emissions are estimated using models developed in NASA’s standard toolset (NPSS/WATE, FLOPS, ANOPP) which has been integrated into Ga Tech’s Environmental Design Space (EDS) tool

• EDS can feed global tools in AEDT for fleet level global impact estimates

• Collaborate between FAA CLEEN and NASA FAP and ISRP

Engine Options:Advanced direct driveGeared TurbofanOpen Rotor

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Addressing Fuel Burn – 1 of 2

N+1 Timeframe (Goal = -33 percent. Reference = B737/CFM56)

Re-engine Only (-20 percent). Less Development- Geared Turbo Fan. Fuel burn and sig. noise reduction- Direct Drive. Fuel burn reduction and minor noise reduction- Open Rotor. Sig. fuel burn reduction and no noise reduction

Replacement (-33 percent). More Development- New engines as above- With new airframe

- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure

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Addressing Fuel Burn - 2 of 2N+2 Timeframe (Goal = -50 percent. Reference = B777/GE90)

Re-engine Only (-20 percent). Less Development- Geared Turbo Fan. Fuel burn and sig. noise reduction- Direct Drive. Fuel burn reduction and minor noise reduction- Open Rotor. Sig. fuel burn reduction and no noise reduction

Replacement Tube and Wing (- 40 percent). More Development- New engines as above- With new airframe

- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure

Configuration Change (- 50 percent). Much More Development- New engines as above- With new airframe

- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure- Much higher chance to significantly reduce community noise

NRA – Vehicle Concept/Preliminary Design Study (2010 – 2012)

• NASA has released a BROAD solicitation this month to:

– Seek up to 4 subsonic transport vehicle concepts capable of simultaneous achievement of the N+2 noise, NOX and fuel burn system level metrics

– Develop 15-year technology maturation roadmaps – addressing propulsion and airframe and integration requirements

– Determine initial system readiness levels, and plot expected system readiness maturation with execution of the 15-year technology roadmaps

– Explore two additional options - • Option 1 – Select up to 2 of subsonic transport vehicle concepts to

develop preliminary designs (of sufficient scale to demonstrate goals)

• Option 2 – Identify risk reduction testing and assessment programs associated with the scaled vehicles.

– Period of performance is 27 months. Available funds = 36.6M

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