This book contains information about different features of jet engines. Firstly, it is history of their development beginning from ancient ages till our days. Secondly, it is simple presentation of operational principles of main types of jet engines. Thirdly, it is information about main producers of gas turbine engines. As a result, these parts of book may be used by wide circle of readers which are interested in history and development of aircraft engines. The final chapter of this book includes of the analysis of constructive schemes of bypass gas turbine engines – it is most widespread type of engines which is used in the civil and military aviation at present. Thus, all this publication may be used as handbook for students of transport directions: mainly there are students of academic programs “Transport system engineering” and “Aviation transport”.