The Mechanical Engineering . Encyclopedia, Volume 4-21: Aircraft and Helicopters. Book 3. Aircraft engines" edited by K. In. Frolova is a unique publication that immerses the reader in the exciting world of aviation technology. This volume is part of an extensive encyclopedia covering various aspects of engineering and aviation, and offers an in-depth understanding of one of the most challenging and interesting areas in this field aircraft engines. In this book you will find comprehensive information about the design, operating principles and modern technologies used in aircraft engines. The authors and specialists working on the creation of this volume have carefully collected and systematized data that will be useful to both aviation professionals and students studying mechanical engineering and aerodynamics. The book not only explains the technical aspects, but also considers the historical development of aircraft engines, which makes it interesting for everyone who is fond of aviation history and technology. This encyclopedia will be especially useful for engineers, designers, as well as students and teachers of technical universities. It will become an indispensable reference material for those who want to deepen their knowledge in the field of aviation engineering and understand how the engines that lift aircraft and helicopters into the sky work. In addition, the book may be of interest to aviation enthusiasts who want to better understand how their favorite aircraft are arranged. The topics raised in the book cover a wide range of issues, from the fundamentals of aerodynamics and thermodynamics to current trends in engine development, such as the use of alternative energy sources and new materials. Readers will be able to learn about different types of engines - from piston to jet engines, as well as about new developments in the field of hybrid and electric engines, which can change the appearance of aviation in the future. Author's style, K. In. Frolov, is distinguished by clarity and accessibility of presentation, which allows even complex technical concepts to be presented in an understandable form His experience in the field of engineering and aviation, as well as working with other well-known works, such as "Engineering. Encyclopedia, Volume 4-20: Aircraft and Helicopters. Book 2. Design and materials", give this publication special value. Readers familiar with the previous volumes will find in this edition a logical continuation and deepening into the topics being studied. The Mechanical Engineering . Encyclopedia, Volume 4-21: Aircraft and Helicopters. Book 3. Aviation Engines" is not just a reference book, but a whole world of knowledge that will help you better understand how the engines that make flying possible. [ ) This edition will be an important addition to the library of anyone who is interested in aviation, mechanical engineering or just wants to expand their horizons in the technical sciences. If you are looking for information about modern aviation technologies, want to learn about new trends in the development of engines or just interested in the history of aviation, this book will become your reliable companion in the world of aviation engineering. Do not miss the opportunity to discover the amazing world of aircraft engines and their role in the development of aviation!