NASA SP-7500

NASA SP-7500

Author: United States. National Aeronautics and Space Administration

Publisher:

Published: 1986

Total Pages: 752

ISBN-13:

DOWNLOAD EBOOK


Modeling Flight NASA Latest Version

Modeling Flight NASA Latest Version

Author: Joseph Chambers

Publisher: Joseph Chambers

Published: 2015-08-10

Total Pages: 202

ISBN-13: 0160846331

DOWNLOAD EBOOK

state of the art in aeronautical engineering has been continually accelerated by the development of advanced analysis and design tools. Used in the early design stages for aircraft and spacecraft, these methods have provided a fundamental understanding of physical phenomena and enabled designers to predict and analyze critical characteristics of new vehicles, including the capability to control or modify unsatisfactory behavior. For example, the relatively recent emergence and routine use of extremely power- ful digital computer hardware and software has had a major impact on design capabilities and procedures. Sophisticated new airflow measurement and visualization systems permit the analyst to conduct micro- and macro-studies of properties within flow fields on and off the surfaces of models in advanced wind tunnels. Trade studies of the most efficient geometrical shapes for aircraft can be conducted with blazing speed within a broad scope of integrated technical disciplines, and the use of sophisticated piloted simulators in the vehicle development process permits the most important segment of operations—the human pilot—to make early assessments of the acceptability of the vehicle for its intended mission. Knowledgeable applica- tions of these tools of the trade dramatically reduce risk and redesign, and increase the marketability and safety of new aerospace vehicles.


Cities and Their Vital Systems

Cities and Their Vital Systems

Author: Advisory Committee on Technology and Society

Publisher: National Academies Press

Published: 1989

Total Pages: 1298

ISBN-13: 9780309037860

DOWNLOAD EBOOK

Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.