Liquid Propellant Rocket Engine

This engine category represents a diverse range of chemical-propellant motors used across China’s strategic and launch vehicle programs. Unlike solid-fuel rockets, these use liquid fuel and an oxidizer for combustion, allowing for throttle control, in-flight shutdowns, and restarts, which are critical for precision maneuvering, lander descent, and orbital insertion. They are foundational to China’s space launch capabilities (like the Long March family) and various large ballistic missiles, showcasing advanced engineering in turbo-pumps, combustion chambers, and structural integrity under extreme heat and pressure.

Category:

YY-2 liquid fuel rocket engine

YY-2 liquid fuel rocket engine

Application areas: hypersonic targets, supersonic targets, unmanned aerial vehicles, retrievable flight demonstrations.

Technical indicators:

Ground specific impulse: ≥220s
Swing angle: ±6°
Reusable times: 10 times
Features: · Green and non-toxic · Storage at room temperature · Spontaneous ignition · Low cost


YY-1 liquid fuel rocket engine


YY-1 liquid fuel rocket engine
Application areas: launch vehicle power, main power for transatmospheric vehicles

Technical indicators:

Fuel: liquid oxygen/kerosene
Vacuum specific impulse: ≥310s
Thrust: 7~21KN
Features: ·Green and non-toxic ·Multiple ignition ·Large range of thrust adjustment


YY-3 liquid fuel rocket engine


YY-3 liquid fuel rocket engine
Application field: landing deceleration power of return aircraft, aircraft boosting power

Technical indicators:
Ground specific impulse:≮242s
Swing angle: ±8°
Reusable times: 10 times
Features: Green and non-toxic, normal temperature storage, spontaneous ignition, low cost


YY-11 liquid fuel rocket engine

YY-11 liquid fuel rocket engine

Application field: first and second stage power of launch vehicle

Technical indicators:
Fuel: liquid oxygen/kerosene
Variable thrust range: 100%~60%
Sea level thrust: 42T
Features: large-scale variable thrust, two-way swing after the pump, multiple starts, low cost

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