Engine Products

Lingyun Engine

The "Lingyun" liquid oxygen-methane engine is the first liquid rocket engine launched by Jiuzhou Yunjian specifically for the commercial space market. It also marks the first domestically developed liquid engine in China that features multiple ignition capabilities, deep thrust modulation, and supports rocket recovery and reuse. With its exceptional multi-ignition performance and a verified thrust modulation range of 20% to 105%, the engine can be configured through multi-stage parallel arrangements to meet the launch, recovery, and reuse requirements of small-scale liquid rockets. This makes it suitable for a wide variety of payloads and mission scenarios, with particularly promising applications in upper-stage rocket systems. Currently, the "Lingyun" engine has successfully completed all required tests, including multiple ignitions, deep thrust modulation, thermal swing tests, low-pressure chamber tests, and high-pressure chamber hot-fire tests. The cumulative duration of these hot-fire tests has exceeded 10,000 seconds. Furthermore, the engine played a critical role in China's demonstration flight and recovery test for a reusable rocket prototype featuring vertical takeoff and landing, achieving complete success.

Longyun Engine

The "Longyun" liquid oxygen-methane engine is the first multi-start, reusable, high-thrust liquid rocket engine launched by Jiuzhou Yunjian. It can serve as the primary first-stage propulsion engine for medium-to-large-sized liquid launch vehicles. The "Longyun" engine boasts a sea-level thrust-to-weight ratio exceeding 80, delivering a sea-level thrust of 70 tons and a vacuum thrust of 80 tons, with a thrust regulation range spanning from 32% to 106%. This engine can be applied in configurations of up to five engines in parallel for rockets with a diameter of 3.35 meters, seven engines in parallel for 3.8-meter-diameter rockets, and nine engines in parallel for 4.2-meter-diameter rockets. Each single module supports liftoff masses ranging from 350 to 630 tons, while the maximum liftoff capacity for heavy-duty parallel configurations can reach up to 1,800 tons. Currently, the "Longyun" engine has successfully completed a 7,000-second hot-fire test evaluation. Notably, it marks the first domestic achievement of ignition testing using stainless steel tanks paired with a liquid oxygen-methane engine. In 2024, the engine will undergo suborbital flight tests and sea-based recovery operations.