
The BE-4 is our fourth-generation liquid rocket engine, made to take us into orbit and beyond.
Rocket Engines Designed for Reuse
Our Approach to Engines
Operationally reusable rockets demand high performance engines capable of deep throttling for soft landings. Built for multiple uses, our family of engines is powering the next generation of rockets for commercial, civil, national security and human spaceflight.
Blue Engines are designed, developed and manufactured at our headquarters in Kent, Washington. We’re now preparing for serial production of our most powerful engine, the BE-4, in Huntsville, Alabama. All our engines and propulsion subsystems are thoroughly tested and qualified in Van Horn, Texas.


Hotfire test of BE-4 at our West Texas Launch Facility in July 2019.

Development History
Engine |
Propellant |
Thrust at Sea Level |
---|---|---|
BE - 1 | Peroxide | 9 kN (2,000 lbf) |
BE - 2 | Kerosene + Peroxide | 140 kN (31,000 lbf) |
BE - 3 | Liquid Hydrogen + Liquid Oxygen | 490 kN (110,000 lbf) |
BE - 4 | Liquefied Natural Gas + Liquid Oxygen | 2,400 kN (550,000 lbf) |
BE - 7 | Liquid Hydrogen + Liquid Oxygen | 40 kN (10,000 lbf) |