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ORIENSPACE’s self-developed原力-110 “Yuanli-110” liquid oxygen-kerosene engine has successfully completed a long-range full-engine hot-fire test.
ORIENSPACE on the month of late September 2026 recently completed a long-range hot-fire test of its 原力-110 “Yuanli-110” liquid oxygen-kerosene engine. This test involved iterative optimization of the engine’s core components and system design, with all core parameters precisely matching design expectations, thus fully testing the engine’s performance and reliability. The “Force-110” is the core propulsion system developed by VFS Global for the “Gravity-2” large reusable liquid-fueled launch vehicle. It has a sea-level thrust of 110 tons, a thrust variation range of 40%-110% across different depths, and is designed for reuse more than 20 times
The “Yuanli-110” is a 100-ton-class liquid oxygen-kerosene rocket engine independently developed by VFS Global, specifically designed for the “Gravity-2” large reusable liquid-fueled launch vehicle. It boasts a sea-level thrust of 110 tons and a vacuum thrust exceeding 120 tons, making it one of the most powerful liquid rocket engines in China’s commercial aerospace sector.
The key technological highlights of this engine include:
- Wide range of thrust adjustment capability : It can achieve thrust adjustment from 40% to 110%, just like precisely “adjusting the throttle”, providing key control for the rocket’s vertical return and landing.
- High reuse design goal : The design goal is to be reusable more than 20 times, and to significantly reduce launch costs through multiple start-ups and deep thrust variation capabilities.
- Advanced technical solution : It adopts a pump-back swing, ignition agent ignition, and nitrogen start-up scheme. The thrust chamber injector is a needle-plug injector, which can adapt to multiple starts.
In terms of R&D progress, the原力-110 “Yuanli-110” engine has undergone multiple rounds of iterative verification, from semi-system testing to full-engine hot-fire testing. The first full-engine hot-fire test was completed in Tai’an, Shandong Province in September 2025, followed by the second in November of the same year, improving the ignition method and verifying multiple start-up capabilities. In late September 2026, the engine successfully completed a long-duration full-engine hot-fire test, conducting iterative optimization of core components and system solutions. All core parameters precisely matched design expectations, marking the engine’s entry into the reliability verification stage.
The engine was developed, assembled, and manufactured entirely by EAST in Liangxi, Wuxi, with a current localization rate of 65% for its components. According to the plan, the “Force-110” will be capable of being launched into space by 2026, providing power support for the maiden flight of “Gravity-2”. In the future, the Wuxi base will have the capacity to produce 100-300 of these engines per year.
The “Yuanli-110” liquid oxygen-kerosene engine, independently developed by Dongfang Space, recently completed a long-range hot-fire test. This core power unit, designed for the reusable rocket “Gravity-2”, has now entered the reliability verification stage
I. Latest Test Drive Progress
- Long-range whole-system hot-fire test : In September 2026, Dongfang Space completed the “Yuanli-110” long-range whole-system hot-fire test. This round of testing focused on the core components.
- Test results : All core parameters precisely matched design expectations, engine performance and reliability were fully tested, and the test process was safe…
- Current stage : Multiple rounds of whole-engine testing have accumulated key data for engineering applications and technology reuse iterations. The engine has entered the reliability verification stage, laying the foundation for subsequent mass production and delivery for flight.110139
II. Core Technical Parameters
- Thrust levels : 110 tons of thrust at sea level and over 120 tons of thrust in vacuum, making it a leading performer in China’s commercial aerospace sector.
- Deep thrust variation capability : It has a wide range of deep thrust variation capability from 40% to 110%, which is like precisely “reducing the throttle” and provides key control for the rocket’s vertical return and landing.
- Reusable design : The design aims to reuse the rocket more than 20 times, which can significantly reduce the rocket’s lifespan.
- Technical solution : The system adopts a pump-back swing, ignition agent ignition, and nitrogen start-up scheme. The thrust chamber uses a needle-plug injector. The system solution is mature and reliable.371410
III. Application and Mass Production Plan
- Supporting rocket : 原力-110 “Yuanli-110” is the Gravity-2 large reusable liquid-fueled launch vehicle.
- Mass production capacity : The Wuxi base will have the capacity to produce 100 to 300 engines per year in the future, which can support 10 to 30 “Gravity 2” flight missions.
- Timeline : It is planned to have the capability to launch rockets by the end of 2026, providing power support for the maiden flight of “Gravity-2”
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