Influence of Static Longitudinal Stability on the Behavior of Airplanes in Gusts PDF Download
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Author: H. Hoene Publisher: ISBN: Category : Equations of motion Languages : en Pages : 740
Book Description
The equations of motion for an airplane penetrating a gust are derived using a few simplifying assumptions. Calculations of loads for different static longitudinal stability on two German airplane models, HC 45 and HS 122, are compared with flight tests. Good agreement is obtained between the trend of the flight tests and the calculated values; however no absolute comparison was possible between the flight tests and calculations.
Author: H. Hoene Publisher: ISBN: Category : Equations of motion Languages : en Pages : 740
Book Description
The equations of motion for an airplane penetrating a gust are derived using a few simplifying assumptions. Calculations of loads for different static longitudinal stability on two German airplane models, HC 45 and HS 122, are compared with flight tests. Good agreement is obtained between the trend of the flight tests and the calculated values; however no absolute comparison was possible between the flight tests and calculations.
Author: A. W. Babister Publisher: Elsevier ISBN: 1483140350 Category : Technology & Engineering Languages : en Pages : 247
Book Description
Aircraft Dynamic Stability and Response deals with the fundamentals of dynamic stability in aircraft. Topics covered include flight dynamics, equations of motion, and lateral and longitudinal aerodynamic derivatives. Basic lateral and longitudinal motions are also considered. A non-dimensional system of notation is used, and problems are included at the end of chapters. This book is comprised of 13 chapters and begins with an introduction to aircraft static stability and maneuverability, with emphasis on the theoretical basis of flight dynamics and the technical terms used. The physical background for the estimation of aerodynamic derivatives is discussed. Subsequent chapters focus on the longitudinal and lateral motion of aircraft, including the effect of automatic control; modern developments such as the effects of aeroelasticity, dynamic coupling, and high incidence; and aircraft response to gusts. The final chapter demonstrates how to estimate the aerodynamic derivatives, and hence the dynamic stability characteristics, of a typical fighter aircraft. Throughout the text, the aircraft and its behavior are kept well to the fore. This monograph is intended for undergraduate students of aeronautical engineering and for newcomers to the aircraft industry.
Author: John P. Campbell Publisher: ISBN: Category : Aerodynamics Languages : en Pages : 26
Book Description
Summary: The effects of static margin and rotational damping in pitch on the longitudinal stability characteristics of an airplane have been determined by flight tests of a model in the NACA free-flight tunnel. In the investigation, the rotational damping in pitch was varied over a wide range by using horizontal tails that varied in area from 0 to 24 percent of the wing area. A range of static margins from 2 to 16 percent of the mean aerodynamic chord was covered in the tests. For each test condition the model was flown and the longitudinal steadiness characteristics were noted. It was found in the investigation that longitudinal steadiness was affected to a much greater extent by changes in static margin than by changes in rotational damping. The best longitudinal steadiness was noted at large values of static margin. For all values of rotational damping, the steadiness of the model decreased as the static margin was reduced. The model was especially unsteady at low values of static margin (0.03 or less). Reduction in rotational damping had little effect on longitudinal steadiness, except that with low values of static margin (0.03 or less) the longitudinal divergences were sometimes more violent with the tailless (low rotational damping) condition.
Author: Robert C. Nelson Publisher: WCB/McGraw-Hill ISBN: 9780071158381 Category : Aerodynamique / Aeronautique / Aerospatial / Automatique / Avion / Commande / Conception / Controle / Navigation / Stabilite Languages : en Pages : 441
Book Description
The second edition of Flight Stability and Automatic Control presents an organized introduction to the useful and relevant topics necessary for a flight stability and controls course. Not only is this text presented at the appropriate mathematical level, it also features standard terminology and nomenclature, along with expanded coverage of classical control theory, autopilot designs, and modern control theory. Through the use of extensive examples, problems, and historical notes, author Robert Nelson develops a concise and vital text for aircraft flight stability and control or flight dynamics courses.
Author: Edgar W. Lorson Publisher: ISBN: Category : Languages : en Pages : 57
Book Description
BOMB RACKS, CONFIGURATIONStudies were made of experimental data to determine the effects of various external store characteristics, spanwise positions, and Mach number on the static longitudinal stability of various aircraft. Data used included results of wind tunnel tests run at the USAF Academy as well as tests run at the Arnold Engineering Development Center, the Naval Ship Research and Development Center and Breguet Aviation. External store characteristics considered were store frontal area, volume, and side projected area. The correlation between any of the three characteristics and change in static margin was approximately the same. Loss in static margin tended to increase to a maximum at moderate values of frontal area, volume, or side projected area and then to decrease for higher values. (Author).
Author: H. Hoene
Author: H. Hoene
Author: H. Hoene
Author: Richard B. Skoog
Author: A. W. Babister
Author: John P. Campbell
Author: Robert C. Nelson
Author: Richard B. Skoog
Author: United States. National Advisory Committee for Aeronautics
Author: Waldemar Otto Brehaus
Author: Edgar W. Lorson