Aircraft and Helicopters . T. IV-21. Design, construction and systems of aircraft" by Matveenko A. M. , Akimov A. and . , Akopov M. G. and others are a real treasure for those who are passionate about aviation, engineering and modern technologies in the field of aerodynamics and aircraft construction This book is a deep and comprehensive analysis of modern methods of designing and constructing aircraft, revealing the secrets of creating both civil and military aircraft and helicopters. Its content is saturated with practical recommendations, theoretical calculations and the latest developments, which makes it an indispensable tool for engineers, students of specialized universities and everyone who seeks to understand the internal cuisine of the aviation industry. The main idea of the book is to show how modern systems, materials and innovative technologies transform the process of creating aircraft. It examines in detail the design principles, from the first sketches to the final tests, as well as the features of design solutions that ensure safety, efficiency and reliability. Particular attention is paid to control systems, aerodynamic characteristics and integration of new technologies, such as composite materials and electronic systems. The author's team, uniting leading specialists in the field of aviation engineering, created a work that not only serves as a textbook, but also inspires new ideas and developments. Aircraft and Helicopters . T. IV-21" is perfect for those who already have basic knowledge in the field of aviation and want to expand their horizons, immersed in modern trends and challenges of the industry. It will be of interest to students of technical universities, graduate students, design engineers and specialists engaged in the development of aircraft. Also, the book may be of interest to enthusiasts who are passionate about aviation technology, and those who are looking for up-to-date information on the latest achievements in the field of aircraft design and systems. The peculiarity of this publication is its relevance and practical focus. It raises the most important topics related to the optimization of the design to improve aerodynamic efficiency, weight loss without loss of strength, the introduction of automated control systems and environmental safety. The author's style is distinguished by clarity and logical consistency, which makes complex technical concepts available to a wide audience. In addition, the book contains many illustrations, diagrams and tables that help to better understand the material and visualize complex processes. If you are looking for a book that combines theory and practice, reveals the secrets of modern aircraft engineering and gives an idea of the future of aviation technology, "Airplanes and Helicopters. T. IV-21” will be an indispensable assistant for you . It will not only expand your knowledge, but also inspire new ideas, help you understand how aircraft are created that can fly long distances, perform complex maneuvers and ensure the safety of passengers and crew. This publication is the result of many years of research and practical experience of leading specialists, and it deservedly takes its place among the best educational and professional publications on aviation engineering. In general, the book "Airplanes and helicopters . T. IV-21 is not just a collection of technical data, but a real guide to the creation of modern aircraft, which combines scientific approach and engineering skills. It deserves the attention of those who are not just interested in aviation, but want to become part of this exciting and constantly evolving industry, contributing to the future of aviation technology.