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AIRCRAFT AND TECHNOLOGY CONCEPTS FOR AN N+3 ...

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NASA System Level Metrics<br />

…. technology for dramatically improving noise, emissions, performance<br />

*** Technology readiness level for key technologies = 4-6<br />

• Energy intensity metric for comparison of fuel burn<br />

** Additional gains may be possible through operational improvements<br />

• Add a climate impact metric for evaluation of the aircraft<br />

performance<br />

* Concepts that enable optimal use of runways at multiple airports within<br />

the metropolitan area<br />

– Global temperature change as a result of the emissions<br />

<strong>N+3</strong><br />

N+1<br />

N+2<br />

4

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