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Application Of Wind Tunnel Free Flight Technique For Wake Vortex Encounters
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Book Synopsis Application of Wind Tunnel Free-Flight Technique for Wake Vortex Encounters by : National Aeronautics and Space Adm Nasa
Download or read book Application of Wind Tunnel Free-Flight Technique for Wake Vortex Encounters written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-02 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind tunnel investigation was conducted in the Langley 30- by 60-Foot Tunnel to assess the free-flight test technique as a tool in research on wake vortex encounters. A typical 17.5-percent scale business-class jet airplane model was flown behind a stationary wing mounted in the forward portion of the wind tunnel test section. The span ratio (model span-generating wingspan) was 0.75. The wing angle of attack could be adjusted to produce a vortex of desired strength. The test airplane model was successfully flown in the vortex and through the vortex for a range of vortex strengths. Data obtained included the model airplane body axis accelerations, angular rates, attitudes, and control positions as a function of vortex strength and relative position. Pilot comments and video records were also recorded during the vortex encounters. Brandon, Jay M. and Jordan, Frank L., Jr. and Stuever, Robert A. and Buttrill, Catherine W. Langley Research Center...
Book Synopsis Application of Wind Tunnel Free-Flight Technique for Wake Vortex Encounters by : Jay M. Brandon
Download or read book Application of Wind Tunnel Free-Flight Technique for Wake Vortex Encounters written by Jay M. Brandon and published by . This book was released on 1997 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of a Panel Method to Wake-vortex/wing Interaction and Comparison with Experimental Data by :
Download or read book Application of a Panel Method to Wake-vortex/wing Interaction and Comparison with Experimental Data written by and published by . This book was released on 1987 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of a Wake Vortex Flight Test Program by :
Download or read book Assessment of a Wake Vortex Flight Test Program written by and published by . This book was released on 1974 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On Subscale Flight Testing by : Alejandro Sobron
Download or read book On Subscale Flight Testing written by Alejandro Sobron and published by Linköping University Electronic Press. This book was released on 2018-11-05 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downscaled physical models, also referred to as subscale models, have played an essential role in the investigation of the complex physics of flight until the recent disruption of numerical simulation. Despite the fact that improvements in computational methods are slowly pushing experimental techniques towards a secondary role as verification or calibration tools, real-world testing of physical prototypes still provides an unmatched confidence. Physical models are very effective at revealing issues that are sometimes not correctly identified in the virtual domain, and hence can be a valuable complement to other design tools. But traditional wind-tunnel testing cannot always meet all of the requirements of modern aeronautical research and development. It is nowadays too expensive to use these scarce facilities to explore different design iterations during the initial stages of aircraft development, or to experiment with new and immature technologies. Testing of free-flight subscale models, referred to as Subscale Flight Testing (SFT), could offer an affordable and low-risk alternative for complementing conventional techniques with both qualitative and quantitative information. The miniaturisation of mechatronic systems, the advances in rapid-prototyping techniques and power storage, as well as new manufacturing methods, currently enable the development of sophisticated test objects at scales that were impractical some decades ago. Moreover, the recent boom in the commercial drone industry has driven a quick development of specialised electronics and sensors, which offer nowadays surprising capabilities at competitive prices. These recent technological disruptions have significantly altered the cost-benefit function of SFT and it is necessary to re-evaluate its potential in the contemporary aircraft development context. This thesis aims to increase the comprehension and knowledge of the SFT method in order to define a practical framework for its use in aircraft design; focusing on low-cost, short-time solutions that don’t require more than a small organization and few resources. This objective is approached from a theoretical point of view by means of an analysis of the physical and practical limitations of the scaling laws; and from an empirical point of view by means of field experiments aimed at identifying practical needs for equipment, methods, and tools. A low-cost data acquisition system is developed and tested; a novel method for semi-automated flight testing in small airspaces is proposed; a set of tools for analysis and visualisation of flight data is presented; and it is also demonstrated that it is possible to explore and demonstrate new technology using SFT with a very limited amount of economic and human resources. All these, together with a theoretical review and contextualisation, contribute to increasing the comprehension and knowledge of the SFT method in general, and its potential applications in aircraft conceptual design in particular.
Book Synopsis Estimates of the Effectiveness of Automatic Control in Alleviating Wake Vortex Induced Roll Excursions by :
Download or read book Estimates of the Effectiveness of Automatic Control in Alleviating Wake Vortex Induced Roll Excursions written by and published by . This book was released on 1977 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA's Contributions to Aeronautics, Volume 2, Flight Environment ..., NASA/SP-2010-570-Vol 2, 2010, * by :
Download or read book NASA's Contributions to Aeronautics, Volume 2, Flight Environment ..., NASA/SP-2010-570-Vol 2, 2010, * written by and published by . This book was released on 2011 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA's Contributions to Aeronautics: Flight environment, operations, flight testing, and research by :
Download or read book NASA's Contributions to Aeronautics: Flight environment, operations, flight testing, and research written by and published by . This book was released on 2010 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Book Synopsis Modeling Flight NASA Latest Version by : Joseph Chambers
Download or read book Modeling Flight NASA Latest Version written by Joseph Chambers and published by Joseph Chambers. This book was released on 2015-08-10 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Wake Turbulence Training Aid written by and published by . This book was released on 1995 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Candidate Wake Vortex Strength Definition for Application to the NASA Aircraft Vortex Spacing System (AVOSS) by : David A. Hinton
Download or read book A Candidate Wake Vortex Strength Definition for Application to the NASA Aircraft Vortex Spacing System (AVOSS) written by David A. Hinton and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wake Turbulence by : National Research Council
Download or read book Wake Turbulence written by National Research Council and published by National Academies Press. This book was released on 2008-03-27 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Without major changes, the current air transportation system will be unable to accommodate the expected increase in demand by 2025. One proposal to address this problem is to use the Global Positioning System to enable aircraft to fly more closely spaced. This approach, however, might be limited by the wake turbulence problem, which can be a safety hazard when smaller aircraft follow relatively larger aircraft too closely. To examine how this potential hazard might be reduced, Congress in 2005 directed NASA to request a study from the NRC to assess the federal wake turbulence R&D program. This book provides a description of the problem, an assessment of the organizational challenges to addressing wake turbulence, an analysis of the technical challenges in wake turbulence, and a proposal for a wake turbulence program plan. A series of recommendations for addressing the wake turbulence challenge are also given.
Book Synopsis A Preliminary Study of a Wake Vortex Encounter Hazard Boundary for a B737-100 Airplane by :
Download or read book A Preliminary Study of a Wake Vortex Encounter Hazard Boundary for a B737-100 Airplane written by and published by . This book was released on 1996 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the NASA First Wake Vortex Dynamic Spacing Workshop by : Leonard Credeur
Download or read book Proceedings of the NASA First Wake Vortex Dynamic Spacing Workshop written by Leonard Credeur and published by . This book was released on 1997 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Drag of a Supercritical Body of Revolution in Free Flight at Transonic Speeds and Comparison with Wind-tunnel Data by : J. W. Usry
Download or read book Drag of a Supercritical Body of Revolution in Free Flight at Transonic Speeds and Comparison with Wind-tunnel Data written by J. W. Usry and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wake Vortex Separation Standards by : David Burnham
Download or read book Wake Vortex Separation Standards written by David Burnham and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wake vortex separation standards are used to prevent hazardous wake vortex encounters. A 'safe' separation model can be used to assess the safety of proposed changes in the standards. A safe separation model can be derived from an encounter hazard model and a vortex decay model. This report presents subsequent developments and applications of such a model which was first developed in the early 1980s. A static encounter hazard model is coupled with a decay model based on sodar measurements of vortex decay. The separation standards and procedures used from 1976 to 1994 are assumed to be safe based on the absence of IFR accidents. Various versions of the model are used to assess how aircraft should be classified and to evaluate the safety of a possible four-class aircraft separation system. Recommendations are made for ways of improving the safe separation models.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
