Download or read book A Method of Accurately Measuring Dynamic Stability Derivatives in Transonic and Supersonic Wind Tunnels written by Harleth G. Wiley and published by . This book was released on 1961 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method of Accurately Measuring Dynamic Stability Derrivatives in Transonic and Supersonic Wind Tunnels written by Harleth G. Wiley and published by . This book was released on 1961 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the method and equipment used at the Langley Research Center of the National Aeronautics and Space Administration for measuring dynamic stability derivatives in transonic and supersonic wind tunnels. The equipment inexorably forces the sting-mounted model to perform a single-degree-of-freedom sinusoidal oscillation while measurrements are made of the displacement and of the moment required to sustain the oscillation. The method is particularly well adapted to the testing of unorthodox aerodynamic bodies whose stability is unpredictable. The frequency and amplitude of the oscillation are controlled by the operator and not dictated by the characteristics of the body. Airstream turbulence and buffeting do not affect the results. Unstable bodies do not cause the mechanism to diverge and configurations with negative damping can be tested. The equipment has proven to be a very versatile research tool. (Author).

Download or read book Rapport written by and published by . This book was released on 1955 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Damping in Pitch Characteristics of a Ten Degree Cone written by Alfred Merle Morrison and published by . This book was released on 1975 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of one-degree-of-freedom dynamic wind tunnel measurements were made for a standard Supersonic Tunnel Association ten degree cone with varying bluntnesses of .25, .1, .0167, and .07. Variations of the stability coefficients with angle-of-attack, bluntness, Reynolds number, and Mach number are obtained including Mach 18 data points for which no previous data existed. An explanation of reported difference between measured dynamic stability as obtained from ballistic range and wind tunnel techniques is offered. The equations of motion, data reduction techniques and experimental methods are also developed.

Download or read book Report written by and published by . This book was released on 1961 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects on Dynamic Lateral Stability and Control of Large Artificial Variations in the Rotary Stability Derivatives written by Robert O. Schade and published by . This book was released on 1952 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an experimental and theoretical investigation of the effects of large artificial variations of four rotary stability derivatives on the dynamic lateral stability and control of a 45 degree sweptback-wing airplane model are presented. The experimental results are presented mainly in the form of flight ratings for stability, control, and general flight behavior. Calculations of period and damping and of the response of rolling and yawing disturbances are also presented.

Download or read book Index Aeronauticus written by and published by . This book was released on 1962 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to Annual Subject Index for Technical Publications Announcements Apr Dec 1962 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symposia written by Defense Documentation Center (U.S.) and published by . This book was released on 1963 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1994 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1970 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Half model Reflection plane Technique for Dynamic Stability Testing at Transonic Mach Numbers written by T. O. Shadow and published by . This book was released on 1977 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was made to determine the feasibility of the half-model reflection-plane technique for measuring dynamic stability derivatives in the transonic speed range. Three model configurations simulating an aircraft, a missile, and a bluff body were investigated both full and half span at Mach numbers from 0.6 to 1.2 and angles of attack from -2 to 90 deg. The half-model reflection-plane technique fully duplicated the full-span results only at subsonic subcritical speeds and angles of attack up to 20 deg. In tests at higher Mach numbers in the transonic range and higher angles of attack up to 90 deg, it was not demonstrated that the half-model technique can provide better than qualitative, order of magnitude results.

Download or read book The Development and Evaluation of the CAL Air Force Dynamic Wind tunnel Testing System written by Irving C. Statler and published by . This book was released on 1967 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cornell Aeronautical Laboratory (CAL) system provides a unique mounting through which a model can be forced precisely in any desired planar sinusoidal motion. The versatility and overall accuracy of the CAL/Air Force dynamic testing system was demonstrated during a series of wind-tunnel tests. These tests permitted, for the first time, a measurement of the separate components of the rotary damping moment. The moment due to rate of change of angle of attack was measured by oscillating the model in pure plunging motion. The moment due to pitch rate was measured during pitching motion. The sum of these is compared with the total rotary damping moment as measured in rotation. Comparisons of data taken at two frequencies and four Mach numbers indicate that the components are accurate to within plus or minus ten percent of the total rotary damping moment. The results are compared with theory, flight test data, and other wind-tunnel measurements on the same and similar models. Future applications of this equipment are reviewed, particularly with regard to its use as a research tool to support basic investigations for the development of theoretical or semiempirical methods for predicting dynamic stability characteristics of aircraft at transonic speeds. (Author).