tailieunhanh - Aerodynamics of helicopter - part 1

Được viết bởi một giáo viên và nhà nghiên cứu quốc tế công nhận, cuốn sách này cung cấp một phương pháp điều trị toàn diện, hiện đại của các nguyên tắc khí động học của máy bay trực thăng và máy bay cánh quay nâng theo bề dọc, chẳng hạn như cánh quạt nghiêng và autogiros. | I AERODYNAMICS OF THE HELICOPTER ALFRED GESSOW GARRYC. MYERS Jr. The standard work on helicopters the best textbook on the subject LEE ARNOLD. Chairman Department of Aeronautics and Astronautics New York University angle DAVID LUNN AERODYNAMICS OF THE HELICOPTER ALFRED GESSOW GARRY c. MYERS JR. FREDERICK UNGAR PUBLISHING co. NEW YORK Dedicated to Morris and Emma Gessow Eighth Printing 1985 Copyright 1952 by Alfred Gessow and the estate of Garry c. Myers Jr. Republished 1967 by arrangement with Alfred Gessow and the estate of Garry c. Myers Jr. Printed in the United States of America ISBN 0-8044-4275-4 Library of Congress Catalog Card Number 67-26126 PREFACE TO THE THIRD PRINTING Since the first printing of Aerodynamics of the Helicopter in 1951 much has happened to the helicopter to justify the faith of the early enthusiasts who predicted a great future for the ungainly noisy vibrating aircraft which could barely lift their own weight on a hot day. The helicopter has fulfilled amply those expectations by proving its worth in a multitude of commercial and military tasks. It is especially gratifying that even in military operations the helicopter has served primarily in a constructive and lifesaving capacity. The impressive list of accomplishments achieved by the modern helicopter is obviously the result of marked improvement over the early models produced during the period when the text for this book was written. Why then republish the book in its original edition To put the question in another way why was it not fully revised Actually the new printing was produced in response to numerous requests from engineers professors and students who were not able to obtain copies of the earlier printings. Obviously then the basic treatment in the text of the various facets of helicopter aerodynamics is fundamental and just as valid for today s helicopters as it was for the earliest versions. The text was not revised for this reason and for fear of tampering with what .