长八甲火箭YF-75DB氢氧发动机完成鉴定试车

Core Viewpoint - The successful test of the YF-75DB hydrogen-oxygen engine marks its official entry into the engineering application phase, enhancing the capabilities of the Long March 8 rocket [1] Group 1: Engine Performance and Features - The YF-75DB engine underwent rigorous testing, completing four test runs with nine ignitions since September 22, validating its performance under complex conditions [1] - The engine features an advanced torch ignition method, allowing for multiple ignitions and eliminating the need for pyrotechnic components, thus improving testing efficiency and reducing testing cycles [1] - The optimization of the gas path system simplifies the testing operation process, further enhancing testing efficiency [1] Group 2: Weight and Capability Enhancements - The YF-75DB engine incorporates several weight-reduction designs, effectively decreasing the overall weight of the engine and improving the rocket's payload capacity [1] - The engine is set to be integrated with the Long March 8 rocket next year, which is expected to enhance the rocket's market competitiveness [1]