Aeronautical Technologies for the Twenty-First Century (1992) / Chapter Skim
Currently Skimming:
Pages 95-102
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From page 97... ...
It is a proper role for the National Aeronautics and Space Administration (NASA) to attack these issues because of the effects that noise, smog, ozone depletion, arid sonic booms have on the quality of life around airports and major cities.
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From page 98... ...
98 AERONAUTICAL TECHNOLOGIES it - ~ pi ~ ~ .................
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From page 99... ...
Finally, at both takeoff and landing, emissions of NOX can increase smog and ozone near the ground. Thus, it Is Operative that Improved modeling, data collection, and verification of models of the chemistry and dynamics of the troposphere and tropopause also be included in NASA's long-te~ subsonic aircraft program.
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From page 100... ...
Increased bypass ratio engines with advanced fan noise reduction are critical, and full achievement will require airframe noise reduction as well. The accepted noise goal for future HSCT aircraft is to be certified to a standard equivalent to the Stage 3 limitations that subsonic aircraft are subject to.
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From page 101... ...
Current configurations for large supersonic aircraft typically produce sonic booms having a maximum overpressure of 2-3 pounds per square foot (psf)
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From page 102... ...
102 AERONAUTICAL TECHNOLOGIES · development of sonic boom exposure criteria needed to assess the potential of acceptable supersonic flight over land; sonic boom propagation studies to better predict environmental (temperature, typography) influence on sonic boom impact; and development of analysis and design methodologies required to produce aircraft conf.~urations that generate sonic boom having mid impact.
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