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IT Home reported on August 5 that the JD-2 engine independently developed by Beijing Interstellar Glory Space Technology Co., Ltd. completed three hot tests in one week: variable thrust and high-operating condition pull-off, 90% rated operating condition 200s long-range, and 100% rated operating condition 200s long-range.Added 500s cumulative working time。

Interstellar Glory disclosed that this round of test products further optimized the gas seal blowing timing and flow, thrust chamber cooling diversion ratio, and startup and shutdown timing, in order to reduce gas consumption, reduce temperature and pressure startup/shutdown impact peaks, etc.; and the ignition circuit of the combustion device was improved with independent dual-channel redundancy and anti-loosening/anti-detachment improvements at the core connection parts, etc., to enhance the reliability of engine ignition and long-term operation.

IT Home learned that the thrust chamber mixing ratio in this round of test reached 3.8.Thrust reaches 93 tonsThe engine chamber pressure and thrust reached the highest values ​​of domestic open-cycle liquid oxygen-methane engines. The engine was in good condition after the test, meeting the overall performance index requirements of the SQX-3 rocket for the engine. The main stage timing of the three test runs was set to the same working conditions.The error between three tests is within ±1%The stability of the engine's reusable performance has been tested and verified.

Subsequently, the JD-2 engine will continue to undergo high-frequency tests of multiple samples, rapidly iterate and optimize the technical status of the product, and deliver highly reliable, high-performance engine products as soon as possible for the maiden flight of the SQX-3 rocket.