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Theory of wing sections
254
BooK
REVIEWS
[J. F. I.
abundance of the natural isotopes, atomic mass values, nuclear spin, slow neutron cross section, half-life and several properties of the nucleus. This attractive and colorful chart should prove to be of much value to scientists interested in nuclear research and to teachers of courses involving nuclear physics, since it presents such a large a m o u n t of useful information in a graphic and easily accessible manner. MARSHALL D. EARLE THEORV OF WING SECTIONS, by Ira H. A b b o t t and Albert E. yon Doenhoff. 693 pages, illustrations and tables, 16 X 24 cm. New York, McGraw-Hill Book Co., Inc., 1949. Price, $15.00. Here is a welcome addition to the library of the rapidly-expanding field of the aeronautical sciences. This book should serve as an extremely h a n d y and useful reference for the practicing aeronautical design engineer and theoretical aerodynamiclst alike. The bulk of the material presented has been covered previously in numerous classified and unclassified NACA (National Advisory Committee for Aeronautics) publications of past and recent years; however, since the authors had participated in the major part of this NACA research, they were therefore in an excellent position to consolidate and compile in this one volume only those data on the aerodynamics of wings at subcriti(~al speeds considered the most important and useful. In view of the present trend toward specialization and the many, many scattered publications on the subject heretofor readily available only to a few, the authors have made a valuable contribution by screening and compiling this information for the numerous engineers and aerodynamicists who must keep up-to-date on a wide variety of subjects. Alternative theoretical approaches to the subiect and many experimental data have been rigorously excluded in order to keep the book at a reasonable length, and these exclusions prevent any claim to complete coverage of the subject. In the theoretical developments the authors have taken care to state the assumptions and to review briefly the elementary principles involved. Additionally, they have attempted to keep the mathematics as simple as is consistent with the difficulties of the problems treated; however, a knowledge of differential and integral calculus and of elementary mechanics is presupposed. The text itself contains only 307 pages including 191 illustrations and a listing of 167 references. The Theoretical t r e a t m e n t progresses from elementary considerations to methods used for the design of NACA low-drag airfoils. Methods and data are presented for using wingsection data to predict wing characteristics, and judiciously selected plots and cross-plots of experimental data are presented for readily useful correlation, justification or non-justification of certain simplifying assumptions made in the theoretical analyses. The general headings contained in the text include: the significance of wing-section characteristics, simple two-dimensional flows, theory of wing sections of finite thickness, theory of thin wing sections, the effects of viscosity, families of wing sections, experimental characteristics of wing sections, high-lift devices, and the effects of compressibility a t subsonic speeds. The four appendices cover 378 pages and present comprehensively the basic thickness forms, mean lines, airfoil ordinates, and experimental aerodynamic characteristics on all the many NACA wing sections including the very latest laminar-flow, low-drag sections. SAMUEL M. BERKOWITZ THE AIRPLANE AND ITS ENGINE, C. a . Chatfield, C. Fayette Taylor, and Shatswell Ober. Fifth Edition, 380 pages, illustrations, 16 X 23 em. New York, McGraw-Hill Book Co., Inc., 1949. Price, $4.50. The authors bring up-to-date a fine text book issued last in 1940. Commentary and illustrations (all new) of aircraft, engines and accessories have been included and modified to keep abreast of the latest developments in jet airplanes and jet propulsion. As in prior editions' the basic treatment is non-mathematical; however, equations dealing with theory are presented in simple basic terms sufficient for computation of the less complicated characteristics of airplane flight and propulsion. Text material covers, in an easy-to-understand manner, the various fundamentals of the airplane including its parts, lift and drag, stability and control,
BooK
REVIEWS
[J. F. I.
abundance of the natural isotopes, atomic mass values, nuclear spin, slow neutron cross section, half-life and several properties of the nucleus. This attractive and colorful chart should prove to be of much value to scientists interested in nuclear research and to teachers of courses involving nuclear physics, since it presents such a large a m o u n t of useful information in a graphic and easily accessible manner. MARSHALL D. EARLE THEORV OF WING SECTIONS, by Ira H. A b b o t t and Albert E. yon Doenhoff. 693 pages, illustrations and tables, 16 X 24 cm. New York, McGraw-Hill Book Co., Inc., 1949. Price, $15.00. Here is a welcome addition to the library of the rapidly-expanding field of the aeronautical sciences. This book should serve as an extremely h a n d y and useful reference for the practicing aeronautical design engineer and theoretical aerodynamiclst alike. The bulk of the material presented has been covered previously in numerous classified and unclassified NACA (National Advisory Committee for Aeronautics) publications of past and recent years; however, since the authors had participated in the major part of this NACA research, they were therefore in an excellent position to consolidate and compile in this one volume only those data on the aerodynamics of wings at subcriti(~al speeds considered the most important and useful. In view of the present trend toward specialization and the many, many scattered publications on the subject heretofor readily available only to a few, the authors have made a valuable contribution by screening and compiling this information for the numerous engineers and aerodynamicists who must keep up-to-date on a wide variety of subjects. Alternative theoretical approaches to the subiect and many experimental data have been rigorously excluded in order to keep the book at a reasonable length, and these exclusions prevent any claim to complete coverage of the subject. In the theoretical developments the authors have taken care to state the assumptions and to review briefly the elementary principles involved. Additionally, they have attempted to keep the mathematics as simple as is consistent with the difficulties of the problems treated; however, a knowledge of differential and integral calculus and of elementary mechanics is presupposed. The text itself contains only 307 pages including 191 illustrations and a listing of 167 references. The Theoretical t r e a t m e n t progresses from elementary considerations to methods used for the design of NACA low-drag airfoils. Methods and data are presented for using wingsection data to predict wing characteristics, and judiciously selected plots and cross-plots of experimental data are presented for readily useful correlation, justification or non-justification of certain simplifying assumptions made in the theoretical analyses. The general headings contained in the text include: the significance of wing-section characteristics, simple two-dimensional flows, theory of wing sections of finite thickness, theory of thin wing sections, the effects of viscosity, families of wing sections, experimental characteristics of wing sections, high-lift devices, and the effects of compressibility a t subsonic speeds. The four appendices cover 378 pages and present comprehensively the basic thickness forms, mean lines, airfoil ordinates, and experimental aerodynamic characteristics on all the many NACA wing sections including the very latest laminar-flow, low-drag sections. SAMUEL M. BERKOWITZ THE AIRPLANE AND ITS ENGINE, C. a . Chatfield, C. Fayette Taylor, and Shatswell Ober. Fifth Edition, 380 pages, illustrations, 16 X 23 em. New York, McGraw-Hill Book Co., Inc., 1949. Price, $4.50. The authors bring up-to-date a fine text book issued last in 1940. Commentary and illustrations (all new) of aircraft, engines and accessories have been included and modified to keep abreast of the latest developments in jet airplanes and jet propulsion. As in prior editions' the basic treatment is non-mathematical; however, equations dealing with theory are presented in simple basic terms sufficient for computation of the less complicated characteristics of airplane flight and propulsion. Text material covers, in an easy-to-understand manner, the various fundamentals of the airplane including its parts, lift and drag, stability and control,