FIELD: rocketry. SUBSTANCE: powder rocket engine consists of steps, one nested into the other, and reinforced by cord to increase mechanical strength. Each step is made thin-welled, with walls in form of semiheat nozzle-chamber. Blind conical or cone-like part of step is made of rocket powder. Supersonic part of step is made of ablative material. To separate powder parts of step ablation is used in form of thin layer on outer surface of powder in which perforations are made to convey flame step to step. EFFECT: reduced weight and overall dimensions of rocket engine. 3 dwg
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