Download or read book Dynamic Balancing of a Nonrolling Sting Supported Wind Tunnel Model Performing Nonplanar Motions written by Kevin E. Yelmgren and published by . This book was released on 1972 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Balancing of a Nonrolling Sting Supported Wind Tunnel Model Performing Nonplanar Motions written by Kevin E. Yelmgren and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-off, bench tests on a wind tunnel model that had freedom to pitch, and yaw, but no freedom to roll indicated that the pitching and yawing motions were inertially coupled. An order of magnitude analysis showed that this coupling was due to the product of inertia term I sub YZ. The inertially coupled equations of motion are solved, and a method is presented for determining the magnitude and sign of L sub yz from recordings of the model motion. The method used to dynamically balance the model is described, and experimental results are presented that verify this method.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Research on Hypersonic Stability Problems written by O. Walchner and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report summarizes the in-house research work on hypersonic stability problems, applicable to reentry dynamics. During the period 1963 to 1974 research contributions were made in the following areas: (1) Static and dynamic stability in pitch; (2) hypersonic roll damping; (3) asymmetric nose effects; (4) non linear aerodynamics; (5) stability coefficients in nonplanar motions. This in-house research effort was terminated as of 1 July 1974.
Download or read book Stability Derivatives of a 10 Cone Executing Planar and Nonplanar Motion at Mach 14 written by Kevin E. Yelmgren and published by . This book was released on 1974 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 10 degree half angle circular cone with 1.6% nose bluntness was mounted to the sting-strut support system of ARL's 20-inch Mach 14 wind tunnel by means of a two-degree of freedom flexure. The small amplitude ((approximately equal to symbol)3 deg.) free oscillation technique allowed the investigation of planar motion in pitch, or planar motion in yaw, or nonplanar motion in pitch and yaw combined. In the case of planar motion, the logarithmic amplitude decayed linearly with time. In the case of nonplanar motion, however, the amplitude decay of both the pitch and yaw components was modulated. Such a beating would be expected if the pitch and yaw motions were coupled. The wind-off runs in vacuum did not show this type of beating; only the wind-on runs did. It is, therefore, conjectured that the nonplanar tests indicate the presence of an aerodynamic acceleration coupling term, pitching moment due to yaw acceleration and vice versa, which has a measurable effect on the motion. The observed beat period equals nearly one hundred pitch or yaw oscillation periods.
Download or read book Government Reports Announcements written by and published by . This book was released on 1973 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1973 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Overview of Landing Gear Dynamics written by Jocelyn I. Pritchard and published by . This book was released on 1999 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: On of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years. Some older publications are included to understand the longevity of the problem and the background from earlier researchers. The literature survey includes analyses, testing, modeling, and simulation of aircraft landing gear; and experimental validation and characterization of shimmy and brake-induced vibration of aircraft landing gear. The paper presents an overview of the problem, background information, and a history of landing gear dynamics problems and solutions. Based on the survey an assessment and recommendations of the most critically needed enhancements to the state of the art will be presented. The status of Langley work contributing to this activity will be given.
Download or read book Atmospheric and Space Flight Dynamics written by Ashish Tewari and published by Springer Science & Business Media. This book was released on 2007-11-15 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a unified presentation that does not discriminate between atmospheric and space flight. It demonstrates that the two disciplines have evolved from the same set of physical principles and introduces a broad range of critical concepts in an accessible, yet mathematically rigorous presentation. The book presents many MATLAB and Simulink-based numerical examples and real-world simulations. Replete with illustrations, end-of-chapter exercises, and selected solutions, the work is primarily useful as a textbook for advanced undergraduate and beginning graduate-level students.
Download or read book CEAS AIAA ICASE NASA Langley International Forum on Aeroelasticity and Structural Dynamics 1999 written by and published by . This book was released on 1999 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Simulation of Aerospace Vehicle Dynamics written by Peter H. Zipfel and published by AIAA. This book was released on 2000 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: A textbook for an advanced undergraduate course in which Zipfel (aerospace engineering, U. of Florida) introduces the fundamentals of an approach to, or step in, design that has become a field in and of itself. The first part assumes an introductory course in dynamics, and the second some specialized knowledge in subsystem technologies. Practicing engineers in the aerospace industry, he suggests, should be able to cover the material without a tutor. Rather than include a disk, he has made supplementary material available on the Internet. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Encyclopedia of Solid Earth Geophysics written by Harsh Gupta and published by Springer Science & Business Media. This book was released on 2011-06-29 with total page 1579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few decades have witnessed the growth of the Earth Sciences in the pursuit of knowledge and understanding of the planet that we live on. This development addresses the challenging endeavor to enrich human lives with the bounties of Nature as well as to preserve the planet for the generations to come. Solid Earth Geophysics aspires to define and quantify the internal structure and processes of the Earth in terms of the principles of physics and forms the intrinsic framework, which other allied disciplines utilize for more specific investigations. The first edition of the Encyclopedia of Solid Earth Geophysics was published in 1989 by Van Nostrand Reinhold publishing company. More than two decades later, this new volume, edited by Prof. Harsh K. Gupta, represents a thoroughly revised and expanded reference work. It brings together more than 200 articles covering established and new concepts of Geophysics across the various sub-disciplines such as Gravity, Geodesy, Geomagnetism, Seismology, Seismics, Deep Earth Processes, Plate Tectonics, Thermal Domains, Computational Methods, etc. in a systematic and consistent format and standard. It is an authoritative and current reference source with extraordinary width of scope. It draws its unique strength from the expert contributions of editors and authors across the globe. It is designed to serve as a valuable and cherished source of information for current and future generations of professionals.
Download or read book Astrophysics Through Computation written by Brian Koberlein and published by Cambridge University Press. This book was released on 2013-06-28 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new astrophysics text integrates analytical and computational methods to explore a broad range of topics in astrophysics.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft and Ground Vehicle Winter Runway Friction Assessment written by Thomas J. Yager and published by . This book was released on 1999 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some background information is given together with the scope and objectives of a 5-year, Joint Winter Runway Friction Measurement Program between the National Aeronautics & Space Adminstration (NASA), Transport Canada (TC), and the Federal Aviation Administration (FAA). The primary objective of this effort is to perform instrumental aircraft and ground vehicle tests aimed at identifying a common number that all the different ground vehicle devices would report. This number, denoted the International Runway Friction Index (IRFI), will be related to all types of aircraft stopping performance. The range of test equipment, the test sites, test results and accomplishments, the extent of the substantial friction database compiled, and future test plans will be described. Several related studies have also been implemented including the effects of contaminant type on aircraft impingement drag, and the effectiveness of various runway and aircraft de-icing chemical types, and application rates.
Download or read book Principles of Aeroelasticity written by Raymond L. Bisplinghoff and published by Courier Corporation. This book was released on 2002-01-01 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary and general methods of constructing static and dynamic equations, dealing with the laws of mechanics for heated elastic solids, forms of aerodynamic operators, structural operators, much more. 1962 edition.
