SOLID-PROPELLANT ROCKET ENGINE Russian patent published in 1998 - IPC

FIELD: rocketry; solid propellant rocket engines with controlled values of summary thrust pulse. SUBSTANCE: solid- propellant rocket engine has housing 1, charge 2, igniter 14, and service holes 6 made in direction of flow behind nozzle neck 4. Central body 11 is provided with telescopically shifted tip 9. Central body gets into stationary part 3 of nozzle behind service holes so that summary through flow area of service holes and ring clearance 12 between outer contour 5 of nozzle and central body is less than or equal to through area of neck of outer contour of nozzle through flow duct. Possibility of longitudinal displacement of telescopic tip and central body provides increase of through flow area of ring clearance between outer contour of nozzle and central body to value exceeding area of nozzle neck. Cylindrical shutter 7 coupled with telescopically shifted tip is provided with radial holes 8 registered with service holes 6. Igniter is placed in central body to control thrust pulse. EFFECT: enlarged operating capabilities and improved reliability. 2 cl, 1 dwg