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Author: AGARD.
Publisher:
Published: 1991
Total Pages: 0
ISBN-13: 9789283506072
DOWNLOAD EBOOKAuthor: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Special Course
Publisher:
Published: 1991
Total Pages: 154
ISBN-13:
DOWNLOAD EBOOK"This report consists of lecture notes of an AGARD Fluid Dynamics Panel Special Course. These notes provide the latest information on the development and use of dynamic experiments in wind tunnels from several of the NATO nations. They address current oscillatory and rotary test techniques, experimental results for typical configurations, and the use of these data for flight mechanics applications. Subject included are: dynamic lift, wing rock, fluid dynamics of rotary flows, mathematical modelling, non-linear data representation, vortex manipulation for control enhancement, and correlations of predictions based on rotary and oscillatory wind-tunnel and flight-test results. The complete course notes are contained in two volumes. The main part of the notes is contained in AGARD Advisory Report 265 (ADA235179). The present volume includes papers on: Unsteady aerodynamics of slender wings; Dynamic stall effects and applications to high performance aircraft; Oscillatory test techniques; Large amplitude oscillations; Oscillatory data for typical configurations; and Forebody vortex control."--Stinet.
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development
Publisher:
Published: 1990
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Marcello R. Napolitano
Publisher: Wiley Global Education
Published: 2012-04-13
Total Pages: 722
ISBN-13: 1118213580
DOWNLOAD EBOOKThe 1st edition of Aircraft Dynamics: from Modeling to Simulation by Marcello R. Napolitano is an innovative textbook with specific features for assisting, motivating and engaging aeronautical/aerospace engineering students in the challenging task of understanding the basic principles of aircraft dynamics and the necessary skills for the modeling of the aerodynamic and thrust forces and moments. Additionally the textbook provides a detailed introduction to the development of simple but very effective simulation environments for today demanding students as well as professionals. The book contains an abundance of real life students sample problems and problems along with very useful Matlab codes.
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development
Publisher:
Published: 1991
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: David F. Fisher
Publisher:
Published: 1998
Total Pages: 38
ISBN-13:
DOWNLOAD EBOOKLessons learned from comparision between ground-based tests and flight measurements for the high-angle-of-attack programs on the F-18 High Alpha Research Vehicle (HARV), the X-29 forward-swept wing aircraft, and the X-31 enhanced fighter maneuverability aircraft are presented. On all three vehicles, Reynolds number effects were evident on the forebodies at high angles of attack. The correlation between flight and wind tunnel forebody pressure distributions for the F-18 HARV were improved by using twin longitudinal grit strips on the forebody of the wind-tunnel model. Pressure distributions obtained on the X-29 wind-tunnel model at flight Reynolds numbers showed excellent correlation with the flight data up to [alpha]=50 deg. Above [alpha]=50 deg. the pressure distributions for both flight and wind tunnel became asymmetric and showed poorer agreement, possibly because of the different surface finish of the model and aircraft. The detrimental effect of a very sharp nose apex was demonstrated on the X-31 aircraft. Grit strips on the forebody of the X-31 reduced the randomness but increased the magnitude of the asymmetry. Nose strakes were required to reduce the forebody yawing moment asymmetries and the grit strips on the flight test noseboom improved the aircraft.
Author: Josef Rom
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 408
ISBN-13: 1461228247
DOWNLOAD EBOOKThe aerodynamics of aircraft at high angles of attack is a subject which is being pursued diligently, because the modern agile fighter aircraft and many of the current generation of missiles must perform well at very high incidence, near and beyond stall. However, a comprehensive presentation of the methods and results applicable to the studies of the complex aerodynamics at high angle of attack has not been covered in monographs or textbooks. This book is not the usual textbook in that it goes beyond just presenting the basic theoretical and experimental know-how, since it contains reference material to practical calculation methods and technical and experimental results which can be useful to the practicing aerospace engineers and scientists. It can certainly be used as a text and reference book for graduate courses on subjects related to high angles of attack aerodynamics and for topics related to three-dimensional separation in viscous flow courses. In addition, the book is addressed to the aerodynamicist interested in a comprehensive reference to methods of analysis and computations of high angle of attack flow phenomena and is written for the aerospace scientist and engineer who is familiar with the basic concepts of viscous and inviscid flows and with computational methods used in fluid dynamics.
Author: Sue B. Grafton
Publisher:
Published: 1971
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKA low-speed investigation was conducted to determine the dynamic stability derivatives in pitch, roll, and yaw over an angle-of-attack range of -10 [degree] to 110 [degree] for a twin-jet swept-wing fighter model. Several frequencies and amplitudes were investigated to determine the effects of these variables on the stability derivatives. The effect of the vertical and horizontal tail, and horizontal-tail incidence on the derivatives was also evaluated. The results indicate that the model exhibited stable values of damping in pitch over the entire angle-of-attack range, but marked reductions of damping in roll were measured at the stall, and unstable values of damping in yaw were present for the very high angles of attack associated with flat spins. Either removal of the horizontal or vertical tail or full up deflection of the horizontal tail eliminated the unstable characteristics of the damping-in-yaw derivatives.
Author: Cezar Dalca
Publisher:
Published: 2016-02-02
Total Pages: 0
ISBN-13: 9781681171074
DOWNLOAD EBOOKAircraft dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of mass, known as pitch, roll and yaw. Aerospace engineers develop control systems for vehicle's orientation about its center mass. The control system contain actuators, which apply forces in several directions and generate rotational forces or moments about the aerodynamic center of the aircraft and thus rotate the aircraft in pitch, roll or yaw. Aircraft Dynamics: From Modelling to Simulation provides readers with modern tools for modelling and stimulation of aircraft dynamics. The emphasis is on detailed modelling of aerodynamic thrust forces and moments. Topics include aircraft equations of motion, modelling of aerodynamic thrust forces and moments on the aircraft and analysis of aircraft static and dynamic stability. This book with specific features for assisting, motivating and engaging aeronautical/aerospace engineering students, in the challenging task of understanding the basic principles of aircraft dynamics and the necessary skills for the modelling of the aerodynamic and thrust forces and moments. Additionally, it also provides a detailed introduction to the development of simple but very effective simulation environments for today demanding students as well as working professionals and researchers.
Author: Ernie L. Anglin
Publisher:
Published: 1971
Total Pages: 100
ISBN-13:
DOWNLOAD EBOOKStatic force tests of model of twin jet fighter aircraft at various angles of attack and sideslip angles to obtain data for theoretical spin studies.
