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.
Key figurescomparable across the catalogue
- Thrust
- 44,000 N
- Specific impulse
- 460 s
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- 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.