The book describes thermogasodynamic bases of calculation of rocket engines on solid fuel (RDTT), engineering methods of calculation of processes of heat exchange, bases of theory of combustion of solid fuels and calculation of indicator curve of pressure in combustion chamber of the engine. The basic information of solid rocket fuels and heat-protective coatings used in RDTT. is given. The regulation of thrust in the RDTT in size and direction is considered, as well as the general technique of ballistic design of solid fuel missiles. Compared to the first edition, the book has been significantly revised and supplemented. The main additions are: solution of simplified problems of internal ballistics of classical artillery and recoilless guns; detailed solution of the problem of internal ballistics of RDTT for all characteristic periods of its functioning The solution is given for three expressions of the law of combustion ofsolid fuel; more detailed solution of the problem of heat and mass exchange for thermal insulation coatings with weight loss; solution of the problem of erosional combustion of solid rocket piles n calculated determination of the time of flash fuel. n *The book is a textbook for students of higher technical educational institutions. It will also be of interest to engineering and technical workers specializing in the field of rocket engines on solid fuel .. Table. 40, illustrated by . 111, Bibl. 170 titles.