Lingyun (rocket engine)

Not to be confused with Longyun (rocket engine).

The Lingyun (Chinese: 凌云; pinyin: Língyún, lit. Soaring above the clouds) is a gas-generator cycle rocket engine burning liquid methane and liquid oxygen under development by Jiuzhou Yunjian.

Lingyun

Country of origin	China
Manufacturer	Jiuzhou Yunjian
Status	Under development
Liquid-fuel engine
Propellant	LOX / CH4
Performance
Thrust, vacuum	123.5 kilonewtons (27,800 lbf)
Thrust, sea-level	100 kilonewtons (22,000 lbf)
Throttle range	30%~100%
Specific impulse, vacuum	355s
Specific impulse, sea-level	287.4s
Dimensions
Dry mass	248 kg (547 lb)
References
Notes	[1]

History

In 2018, Jiuzhou Yunjian's Lingyun engine successfully passed tests for its gas-generator, ignitor, and valves.^[2] In 2021, the Lingyun engine completed multiple starts and deep variable thrust tests, demonstrating a breakthrough in reusability technology for the company.^[3]