BE-7 Engine
Blue Origin
High-efficiency LH2/LOX dual expander cycle engine for the Blue Moon lunar lander, with world-record continuous static fire duration.
Typed specifications4 values
Discloses 3 of 10 fields engineers filter by in this category (category median 3).
- Thrust
- 44 000 000 mN product page
- Specific impulse
- 460 s product page
- Propellant
- hydrogen product page oxygen
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier7 lines, in the manufacturer's own wording
- Thrust (Vacuum)
- 44,000 N (10,000 lbf)
- Specific impulse (Vacuum)
- 460 s
- Propellants
- Liquid hydrogen / Liquid oxygen (LH₂/LOX)
- Combustion cycle
- Dual expander cycle
- Throttle range
- 20–100%
- Applications
- Blue Moon Mk1 (1×), Blue Moon Mk2 (3×)
- Longest static fire
- ~2,500 s (June 2026, world record)
About
The BE-7 is Blue Origin’s liquid hydrogen and liquid oxygen rocket engine designed specifically for precision lunar landing applications. It operates on a dual expander cycle, generating 44,000 N (10,000 lbf) of vacuum thrust with a specific impulse of 460 seconds — the highest Isp of any of Blue Origin’s engines. A throttle range of 20–100% enables the fine thrust control required for powered descent and soft touchdown on the lunar surface.
BE-7 serves as both the descent and ascent engine for the Blue Moon family of lunar landers: the Mark 1 robotic cargo lander uses a single BE-7, while the crewed Mark 2 variant uses three engines for redundancy. In June 2026, Blue Origin completed a record-breaking static fire test of approximately 2,500 seconds of continuous operation — the longest continuous rocket engine burn in history, surpassing the Space Shuttle Main Engine’s prior record.
The engine uses additive manufacturing to reduce part count and production cost. Its LH2/LOX propellants could eventually be produced from lunar ice deposits through in-situ resource utilization (ISRU), enabling sustainable long-duration lunar missions. Test campaigns have been conducted at Marshall Space Flight Center and Edwards Air Force Base vacuum test facilities.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.