FIELD: rocketry.
SUBSTANCE: proposed solid-propellant booster engine contains annular combustion chamber with nozzle unit, igniter and multigrain charge. Charge is made up of all-round-burning grains in form of nested channel cylinders whose axes are arranged on arc of circumference. Longitudinal projections - zigs are made on periphery sections of grain profile adjoining outer and/or inner contours, width of projections does not exceed value of double thickness of charge burning dome. Distance between axes of channel cylinders and diameter of arc of circumference on which said axes are located is found from relation protected by proposed invention. Profiles of projections in cross section are either trapezoidal and/or triangular.
EFFECT: provision of stable coming of boost engine to operating conditions and reliability of its operation, increased total thrust impulse.
2 cl, 8 dwg
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