On March 12, developed by China Aerospace110-ton needleboltliquid oxygen kerosene engineLi QingThe long-distance test run was completed on the 2nd.This is a key node in the development of this type of recyclable rocket engine, which comprehensively assesses long-term working reliability.
During this test run, Liqing No. 2 experienced multiple ignitions.The maximum single working time is 200 seconds, and the total working time is 420 seconds, covering the flight time of the first sub-stage of the rocket.The cumulative test run time of this engine has exceeded 1,000 seconds.
Chen Zhan, chief designer of the China Aerospace Liqing No. 2 engine, said that this marks that this type of engine can enter the reliability qualification test stage and prepare for mass production.
Liqing No. 2 adopts pin bolt design. This design installs a needle-like protrusion in the center of the engine nozzle to achieve precise control of thrust with a minimalist structure and high reliability. It is one of the key technologies for recyclable rockets.Compared with traditional designs, it is lower cost and lighter, taking into account high performance and economy.
According to reports, Liqing 2 will subsequently serve as the main engine of the China Aerospace Recyclable Rockets "Lijian 2" and "Lijian 2 Heavy".