DUAL-NOZZLE SOLID PROPELLANT ROCKET ENGINE (SPRE) WITH A MULTI-GRAIN CHARGE Russian patent published in 2023 - IPC F02K9/30 F02K9/32 

FIELD: rocket and space.

SUBSTANCE: invention can be used to create engines that perform the functions of braking, separation, withdrawal from the flight path and spin aircraft. A dual-nozzle solid propellant rocket engine (SPRE) with a multi-grain charge installed in the housing between the support grids, two igniters and two pyrotechnics located on both sides of the ends of the charge, according to the invention, the igniters located on both sides of the ends of the charge are mirror-symmetrically displaced relative to the main axis, and the flow holes of the igniters are facing the ends of the charge, and the axis of the flow hole of each igniter coincides with the axis of the internal channel of one of the charge grains located opposite the igniter. The distance from the plane of the igniter outlet to the end of the charge is not more than two diameters of the igniter outlet. The design of the solid propellant rocket engine is given, explaining the mutual arrangement of the charge, igniters and additional screens in two illustrations.

EFFECT: reduction in the time of ignition and its stabilization by intensifying the process of heating the combustion surfaces of the solid fuel charge.

3 cl, 2 dwg