Recently, Longyun Engine completed its first round of reliability hot test assessment, and the total test time has exceeded 7000 seconds, with a maximum single test time of 3700 seconds.

In this round of tests, the measured minimum thrust cutoff of the Longyun engine was 215kN, and the thrust adaptation range reached 32% -106% (720kN).

The key points include the following assessment items

• Rated Long Range Hot Test Run of the Engine
• Engine hot swing test
• Hot test of undercooled propellant
• Multiple starts of hot commissioning
• Deep variable thrust hot test
• Thrust pull bias hot test
• Grading start hot test
• Pump overload hot test