FIELD: machine building.
SUBSTANCE: invention relates to solid-propellant rocket engines used for air supply of demining charge at preset distance when engine is used in mine-clearing installations. Rocket engine includes shell, front cover, nozzle unit with six nozzles inclined to engine longitudinal axis, igniter and single-channel charge in the form of solid propellant rock cartridge armored along outer surface and ends. Two groups of internal radial grooves are made at the front and nozzle end faces of the charge so that grooves of each group have different distance to external surface of charge fuel. For each group of grooves distance from charge end to groove, closest to end, is 0.8–1 distance from groove to external surface of fuel charge. Distance between adjacent surfaces of adjacent grooves makes 1.6–2 of distance from groove to external surface of charge fuel. Charge is arranged between the front and nozzle supports, and the nozzle support is equipped with a shutter.
EFFECT: invention allows improving operating efficiency of rocket engine, as well as its ignition reliability.
1 cl, 5 dwg
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