Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
On Subscale Flight Testing
Download On Subscale Flight Testing full books in PDF, epub, and Kindle. Read online On Subscale Flight Testing ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
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 Flight Testing of Airbreathing Hypersonic Vehicles by : John W. Hicks
Download or read book Flight Testing of Airbreathing Hypersonic Vehicles written by John W. Hicks and published by . This book was released on 1993 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flight Testing of Fixed Wing Aircraft by : Ralph D. Kimberlin
Download or read book Flight Testing of Fixed Wing Aircraft written by Ralph D. Kimberlin and published by AIAA. This book was released on 2003 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation The measurement of performance during an airplane's flight, testing is one of the more important tasks to be accomplished during its development as it impacts on both the airplane's safety and its marketability. This book discusses performance for both propeller-driven and jet aircraft.
Book Synopsis Understanding Performance Flight Testing: Kitplanes and Production Aircraft by : Hubert Smith
Download or read book Understanding Performance Flight Testing: Kitplanes and Production Aircraft written by Hubert Smith and published by McGraw Hill Professional. This book was released on 2001-09-18 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: *Covers lightplane performance flight testing methods, measures, and computer applications *Includes CD-ROM with sample spreadsheets containing equations to help readers perform their own flight tests *Describes GPS (Global Positioning System) test method for airspeed calibration and rapid-wind camera method for takeoff performance
Book Synopsis Flying beyond the stall by : Douglas A. Joyce
Download or read book Flying beyond the stall written by Douglas A. Joyce and published by . This book was released on 2014 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The X-31 Enhanced Fighter Maneuverability Demonstrator was unique among experimental aircraft. A joint effort of the United States and Germany, the X-31 was the only X-plane to be designed, manufactured, and flight tested as an international collaboration. It was also the only X-plane to support two separate test programs conducted years apart, one administered largely by NASA and the other by the U.S. Navy, as well as the first X-plane ever to perform at the Paris Air Show. Flying Beyond the Stall begins by describing the government agencies and private-sector industries involved in the X-31 program, the genesis of the supermaneuverability concept and its initial design breakthroughs, design and fabrication of two test airframes, preparation for the X-31's first flight, and the first flights of Ship #1 and Ship #2. Subsequent chapters discuss envelope expansion, handling qualities (especially at high angles of attack), and flight with vectored thrust. The book then turns to the program's move to NASA's Dryden Flight Research Center and actual flight test data. Additional tasking, such as helmet-mounted display evaluations, handling quality studies, aerodynamic parameter estimation, and a "tailless" study are also discussed.The book describes how, in the aftermath of a disastrous accident with Ship #1 in 1995, Ship #2 was prepared for its outstanding participation in the Paris Air Show. The aircraft was then shipped back to Edwards AFB and put into storage until the late 1990s, when it was refurbished for participation in the U. S. Navy's VECTOR program. The book ends with a comprehensive discussion of lessons learned and includes an Appendix containing detailed information.
Book Synopsis Flight Test System Identification by : Roger Larsson
Download or read book Flight Test System Identification written by Roger Larsson and published by Linköping University Electronic Press. This book was released on 2019-05-15 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the demand for more advanced fighter aircraft, relying on unstable flight mechanical characteristics to gain flight performance, more focus has been put on model-based system engineering to help with the design work. The flight control system design is one important part that relies on this modeling. Therefore, it has become more important to develop flight mechanical models that are highly accurate in the whole flight envelope. For today’s modern fighter aircraft, the basic flight mechanical characteristics change between linear and nonlinear as well as stable and unstable as an effect of the desired capability of advanced maneuvering at subsonic, transonic and supersonic speeds. This thesis combines the subject of system identification, which is the art of building mathematical models of dynamical systems based on measurements, with aeronautical engineering in order to find methods for identifying flight mechanical characteristics. Here, some challenging aeronautical identification problems, estimating model parameters from flight-testing, are treated. Two aspects are considered. The first is online identification during flight-testing with the intent to aid the engineers in the analysis process when looking at the flight mechanical characteristics. This will also ensure that enough information is available in the resulting test data for post-flight analysis. Here, a frequency domain method is used. An existing method has been developed further by including an Instrumental Variable approach to take care of noisy data including atmospheric turbulence and by a sensor-fusion step to handle varying excitation during an experiment. The method treats linear systems that can be both stable and unstable working under feedback control. An experiment has been performed on a radio-controlled demonstrator aircraft. For this, multisine input signals have been designed and the results show that it is possible to perform more time-efficient flight-testing compared with standard input signals. The other aspect is post-flight identification of nonlinear characteristics. Here the properties of a parameterized observer approach, using a prediction-error method, are investigated. This approach is compared with four other methods for some test cases. It is shown that this parameterized observer approach is the most robust one with respect to noise disturbances and initial offsets. Another attractive property is that no user parameters have to be tuned by the engineers in order to get the best performance. All methods in this thesis have been validated on simulated data where the system is known, and have also been tested on real flight test data. Both of the investigated approaches show promising results.
Book Synopsis Aircraft Ground Tests and Subscale Model Results of Axial Thrust Loss Caused by Thrust Vectoring Using Turning Vanes by : Steven A. Johnson
Download or read book Aircraft Ground Tests and Subscale Model Results of Axial Thrust Loss Caused by Thrust Vectoring Using Turning Vanes written by Steven A. Johnson and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium Publisher : ISBN 13 : Total Pages :404 pages Book Rating :4.E/5 ( download)
Book Synopsis Advances in Flight Testing by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium
Download or read book Advances in Flight Testing written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium and published by . This book was released on 1997 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Aircraft Flight Test Engineering by : Hubert C. Smith
Download or read book Introduction to Aircraft Flight Test Engineering written by Hubert C. Smith and published by . This book was released on 1974 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the National Aerospace Initiative by : National Research Council
Download or read book Evaluation of the National Aerospace Initiative written by National Research Council and published by National Academies Press. This book was released on 2004-06-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Aerospace Initiative (NAI) was conceived as a joint effort between the Department of Defense (DOD) and the National Aeronautics and Space Administration (NASA) to sustain the aerospace leadership of the United States through the acceleration of selected aerospace technologies: hypersonic flight, access to space, and space technologies. The Air Force became concerned about the NAI's possible consequences on Air Force programs and budget if NAI program decisions differed from Air Force priorities. To examine this issue, it asked the NRC for an independent review of the NAI. This report presents the results of that assessment. It focuses on three questions asked by the Air Force: is NAI technically feasible in the time frame laid out; is it financially feasible over that period; and is it operationally relevant.
Download or read book Flight Testing of Aircraft written by and published by . This book was released on 1967 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerospace Plane Technology by : United States. General Accounting Office
Download or read book Aerospace Plane Technology written by United States. General Accounting Office and published by . This book was released on 1991 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fuselage and Nozzle Pressure Distributions of a 1/12-scale F-15 Propulsion Model at Transonic Speeds by : Odis C. Pendergraft
Download or read book Fuselage and Nozzle Pressure Distributions of a 1/12-scale F-15 Propulsion Model at Transonic Speeds written by Odis C. Pendergraft and published by . This book was released on 1984 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel and Propulsion Test Facilities by : Philip S. Antón
Download or read book Wind Tunnel and Propulsion Test Facilities written by Philip S. Antón and published by Minnesota Historical Society. This book was released on 2004 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Aeronautics and Space Administration's (NASA's) wind tunnel and propulsion test facilities continue to be important to U.S. competitiveness across the military, commercial, and space sectors. Unfortunately, management issues are creating real risks to these facilities. NASA needs to develop an aeronautics test technology vision and plan; analyze the viability of a national test facility plan; identify and maintain its minimum set of facilities; and identify financial shared support to keep its underutilized but essential facilities from entering financial collapse.
Download or read book Aerospace Plane Technology written by and published by DIANE Publishing. This book was released on 1994-03 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on aerospace plane technology efforts in Japan, since it is developing technologies and conducting feasibility studies for various concepts of operational aerospace planes. Australia is included because it supports technology development efforts through national research and the use of its test facilities. Contains 23 charts, tables and projected plane drawings, and a 17-page glossary of terms.
Download or read book Against the Wind written by and published by . This book was released on 1994 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Full-scale Wind-tunnel Tests of a Small Unpowered Jet Aircraft with a T-Tail by : Paul T. Soderman
Download or read book Full-scale Wind-tunnel Tests of a Small Unpowered Jet Aircraft with a T-Tail written by Paul T. Soderman and published by . This book was released on 1971 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aerodynamic characteristics of a full scale executive type jet transport aircraft with a T-tail were investigated in a 40 x 80 ft (12.2 by 24.4 meter) wind tunnel (subsonic). Static, longitudinal, and lateral stability, and control characteristics were determined at angles of attack from -2 deg to 42 deg. The aircraft wing had 13 deg of sweep and an aspect ratio of 5.02. The aircraft was tested power off with various wing leading- and trailing-edge high lift devices. The basic configuration was tested with and without such components as engine nacelles, wing tip tanks, and empannage. Hinge-moment data were obtained and downwash angles in the horizontal-tail plane location were calculated. The data were obtained at Reynolds numbers of 4.1 million and 8.7 million based on mean aerodynamic chord. The model had static longitudinal stability through initial stall. Severe tail buffet occurred near the angle of attack for maximum lift. Above initial stall the aircraft had pronounced pitch-up, characteristic of T-tail configurations. A stable trim point was possible at angles of attack between 30 deg and 40 deg (depending on c.g. location and flap setting). Hinge-moment data showed no regions with adverse effects on stick force. Comparisons of wind-tunnel data and flight-test are presented.
