Engines the world can depend on
Masterfully tuned to an optimal balance of Performance, Reliability, and Cost
Our Engines
Our engines are optimized to offer high performance, diverse capability, and unwavering reliability — all at a competitive price.
In Production
Hadley
5,000
lbf
Ox-rich Staged Combustion
Thrust, Sea Level
Lox / Kerosene
Propellants
Reusable
Low Earth OrbitGeostationary OrbitIn-SpaceHypersonics
In Production
In Development
Ripley
50,000
lbf
Ox-rich Staged Combustion
Thrust, Sea Level
Lox / Kerosene
Propellants
Reusable
Low EarthGeostationary Orbit
In Development
In Development
Arroway
200,000
lbf
THRUST, SEA LEVEL
Lox / Methane
PROPELLANTS
Reusable
Medium & Heavy Boost
In Development
that set a new standard
We meticulously design, craft, and test our engines to achieve unmatched quality and reliability — and it’s all backed by the consistent stream of test data logged at our in-house facility.
Design
We use cutting-edge design techniques to create parts that simply couldn’t exist even ten years ago.
Fabrication
We leverage additive manufacturing (3D printing) to reduce overall part count, which reduces development time and allows for rapid redesign, manufacturing, and test iteration.
Testing
All Ursa Major engines are tested and developed at our in-house facility in Colorado, allowing for unmatched control over test scheduling.
Design
We use cutting-edge design techniques to create parts that simply couldn’t exist even ten years ago.
Fabrication
We leverage additive manufacturing (3D printing) to reduce overall part count, which reduces development time and allows for rapid redesign, manufacturing, and test iteration.
Testing
All Ursa Major engines are tested and developed at our in-house facility in Colorado, allowing for unmatched control over test scheduling.