Download or read book Analytic Prediction of Airplane Equilibrium Spin Characteristics written by William Mansfield Adams and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nonlinear equations of motion are solved algebraically for conditions for which an airplane is in an equilibrium spin. Constrained minimization techniques are employed in obtaining the solution. Linear characteristics of the airplane about the equilibrium points are also presented and their significance in identifying the stability characteristics of the equilibrium points is discussed. Computer time requirements are small making the method appear potentially applicable in airplane design. Results are obtained for several configurations and are compared with other analytic-numerical methods employed in spin prediction. Correlation with experimental results is discussed for one configuration for which a rather extensive data base was available. A need is indicated for higher Reynolds number data taken under conditions which more accurately simulate a spin.
Download or read book Analytic Prediction of Airplane Equilibrium Spin Characteristics written by W. M. Adams (Jr) and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SPINEQ A Program for Determining Aircraft Equilibrium Spin Characteristics Including Stability written by and published by . This book was released on 1978 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SPINEQ a Program for Determining Aircraft Equilibrium Spin Characteristics Including Stability written by William M. Adams and published by . This book was released on 1978 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1974 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Determination of Aircraft Spin Modes written by David L. Westgate and published by . This book was released on 1974 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six non-linear equations of motion for a rigid body are used to model the aircraft's motion while in a spin. After applying the conditions for an equilibrium spin, the resulting six non-linear simultaneous equations are solved using a method that is accurate and well suited for use with a high-speed digital computer. The solution yields the equilibrium spin conditions and these solutions were usually obtained with less than three seconds of computer time. These results are compared with the results from previous prediction schemes. The linear characteristics of the aircraft about the equilibrium points are also presented. The model chosen for this study was a delta-wing fighter configuration.
Download or read book Analytical Investigation and Prediction of Spin and Recovery Characteristics of the North American X 15 Airplane written by William D. Grantham and published by . This book was released on 1960 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1978 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Prediction of the B 58a Spin Characteristics Phase Ii Correlation of Analytical Model Spin Predictions with Free Flight Model Test Results written by M. W. Bahnman and published by . This book was released on 1963 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This spin investigation is composed of freeflight model spin-entry and developed-spin tests, static and rotary force-model wind-tunnel tests to extreme angles of attack and sideslip, and an analytical program for prediction of high angle of attack motion. The second phase uses final, low Reynolds number aerodynamic data and deals with the correlation of analytical predictions of model motion with free-flight model test results. The objective is to determine the accuracy of analytical predictions of the model motions at extreme angles of attack so as to establish the level of confidence to be placed in the prediction of full-scale airplane motion. The free-flight model test program consisted of spin-entry (catapult) tests and developed-spin (spin tunnel) tests. Time histories of the motion of a 1/40-scale dynamically-similar model of the B-58A were obtained from raw test data transmitted by NASA. From comparison of analytical predictions of model motion with experimental time histories, it is concluded that analytical predictions of stall and spin-entry motion are quite adequate and valid. The developed-spin predictions are less accurate than those for spin-entry. However, they are representative of the developed-spin motion and the general levels of periods and amplitudes of the oscillations are acceptable. (Authr).
Download or read book NASA Technical Paper written by and published by . This book was released on 1987 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Dynamics Simulation and Control written by Ranjan Vepa and published by CRC Press. This book was released on 2014-08-18 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore Key Concepts and Techniques Associated with Control Configured Elastic AircraftA rapid rise in air travel in the past decade is driving the development of newer, more energy-efficient, and malleable aircraft. Typically lighter and more flexible than the traditional rigid body, this new ideal calls for adaptations to some conventional concep
Download or read book Computer Program Abstracts written by and published by . This book was released on 1979 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of an Analytical Technique for the Prediction of the Spin and Spin Recovery Characteristics of a Contemporary Airplane written by R. H. HANNA and published by . This book was released on 1961 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: THE EVALUATION OF AN ANALYTICAL METHOD FOR THE PREDICTION OF SPIN AND SPIN RECOVERY CHARACTERISTICS OF A CONTEMPORARY AIRPLANE IS DESCRIBED. The spin characteristics of an airplane can be accurately determined through the use of static wind tunnel data and estimated rotary and damping derivations based on static wind tunnel data. (Author).
Download or read book Analytical Study of Aircraft developed Spins and Determination of Moments Required for Satisfactory Spin Recovery written by Ernie L. Anglin and published by . This book was released on 1964 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Testing written by Steffen Haakon Schrader and published by Springer Nature. This book was released on 2023-03-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: As spinning is still involved in around 60% of all aircraft accidents (BFU, 1985 and Belcastro, 2009), this aerodynamic phenomenon is still not fully understood. As U.S. and European Certification Specifications do not require recoveries from fully developed spins of Normal Category aeroplanes, certification test flights will not discover aeroplane mass and centre of gravity combinations which may result in unrecoverable spins. This book aims to contribute to a better understanding of the spin phenomenon through investigating the spin regime for normal, utility and aerobatic aircraft, and to explain what happens to the aircraft in terms of the aerodynamics, flight mechanics and the aircraft stability. The approach used is to vary the main geometric parameters such as the centre of gravity position and the aeroplane’s mass across the flight envelope, and to investigate the subsequent effect on the main spin characteristic parameters such as the angle of attack, pitch angle, sideslip angle, rotational rates, and recovery time. First of all, a literature review sums up the range of technical aspects that affect the problem of spinning. It reviews the experimental measurement techniques used, theoretical methods developed and flight test results obtained by previous researchers. The published results have been studied to extract the effect on spinning of aircraft geometry, control surface effectiveness, flight operational parameters and atmospheric effects. Consideration is also made of the influence on human performance of spinning, the current spin regulations and the available training material for pilots. A conventional-geometry, single-engine low-wing aeroplane, the basic trainer Fuji FA-200-160, has been instrumented with a proven digital flight measurement system and 27 spins have been systematically conducted inside and outside the certified flight envelope. The accuracy of the flight measurements is ensured through effective calibration, and the choice of sensors has varied through the study, with earlier sensors suffering from more drift than the current sensors (Belcastro, 2009 and Schrader, 2013). In-flight parameter data collected includes left and right wing α and β-angles, roll-pitch-yaw angles and corresponding rates, all control surface deflections, vertical speeds, altitude losses and the aeroplane’s accelerations in all three directions. Such data have been statistically analysed. The pitch behaviour has been mathematically modelled on the basis of the gathered flight test data. Nine observations have been proposed. These mainly cover the effects of centre of gravity and aircraft mass variations on spin characteristic behaviour. They have all been proven as true through the results of this thesis. The final observation concerns the generalisation of the Fuji results, to the spin behaviour of other aircraft in the same category. These observations can be used to improve flight test programmes, aircraft design processes, flight training materials and hence contribute strongly to better flight safety.
Download or read book Flight Dynamics written by Robert F. Stengel and published by Princeton University Press. This book was released on 2015-01-27 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flight Dynamics takes a new approach to the science and mathematics of aircraft flight, unifying principles of aeronautics with contemporary systems analysis. While presenting traditional material that is critical to understanding aircraft motions, it does so in the context of modern computational tools and multivariable methods. Robert Stengel devotes particular attention to models and techniques that are appropriate for analysis, simulation, evaluation of flying qualities, and control system design. He establishes bridges to classical analysis and results, and explores new territory that was treated only inferentially in earlier books. This book combines a highly accessible style of presentation with contents that will appeal to graduate students and to professionals already familiar with basic flight dynamics. Dynamic analysis has changed dramatically in recent decades, with the introduction of powerful personal computers and scientific programming languages. Analysis programs have become so pervasive that it can be assumed that all students and practicing engineers working on aircraft flight dynamics have access to them. Therefore, this book presents the principles, derivations, and equations of flight dynamics with frequent reference to MATLAB functions and examples. By using common notation and not assuming a strong background in aeronautics, Flight Dynamics will engage a wide variety of readers. Introductions to aerodynamics, propulsion, structures, flying qualities, flight control, and the atmospheric and gravitational environment accompany the development of the aircraft's dynamic equations.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
