• Longyun Engine
Longyun Engine
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  • Product Description

  • Longyun Engine

     

    70-ton Liquid Oxygen-Methane Engine

    Product Introduction: 
    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 system for medium- to large-scale 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 modulation range spanning from 32% to 106%. This engine can be configured in parallel setups of up to five units for rockets with a diameter of 3.35 meters, seven units for 3.8-meter-diameter rockets, or nine units for 4.2-meter-diameter rockets. Each individual module supports liftoff masses ranging from 350 to 630 tons, while the heaviest configuration—utilizing multiple parallel modules—can achieve liftoff masses as high as 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.

    Product Specifications:

    Ground Thrust: 676 kN 
    Vacuum Thrust: 704 kN 
    Specific Impulse on Ground: 290 s 
    Vacuum Specific Impulse: 350 s 
    Engine weight: ≤ 850 kg

    Maximum engine swing angle: ±8° 
    Thrust Adjustment Range: 32% - 106% 
    Multiple start capability in a single task: ≥3 times 
    Single working duration: ≥200s 
    Number of reuses: ≥50 times

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  • Longyun Engine
Longyun Engine
+

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.

Email:

marketing@jzyjspace.com

Phone:

086 10-67948968

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Jiuzhou Yunjian (Beijing) Space Technology Co., Ltd. is a national high-tech enterprise integrating liquid rocket engine design and development, assembly and testing, as well as comprehensive end-to-end flight support services.

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086 10-67948968/9

zhaopin@jzyjspace.com

2nd Floor, Building 32, No. 109 Jinghai 3rd Road, Beijing Economic-Technological Development Area

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