Enginee
Background engines page

Engines the world can depend on

Masterfully tuned to an optimal balance of Performance, Reliability, and Cost

Our Engines

Everything you need to get there

Our engines are optimized to offer high performance, diverse capability, and unwavering reliability — all at a competitive price.

Performance
Capability
Reliability
Ox-Rich Staged Combustion
High-performing engine cycle in a compact design, innovating technology to its limit
Reusability
Single engines capable of multi-mission use and extended duration applications
Thrust Vector Control
Precise gimbal maneuvering and control
Active Throttle Range
Allows for Max-Q throttling, g-limit throttling and mission-specific thrust profiles
Single-Mission Restarts
Allows for efficient orbit-changing burns, de-orbit burns, and Stage 1 recovery
Custom Burn Duration
Allows for flexibility in mission planning and total impulse
Engine Testing
Over 20K seconds of test time on Ursa Major test stands, increasing every day
Design & Analysis
Expertise in structural analysis and a design process that achieves peak industry standards
Additive Manufacturing
Reduction in overall part count and an ability to rapidly redesign, manufacture, and test iterations
Hadley Full Height

Initial Production

Hadley

5,000

lbf

Ox-rich Staged Combustion

Thrust, Sea Level

Lox / Kerosene

Propellants

Reusable

Low Earth OrbitGeostationary OrbitIn-SpaceHypersonics

Initial Production

Ripley Full Height

In Development

Ripley

50,000

lbf

Ox-rich Staged Combustion

Thrust, Sea Level

Lox / Kerosene

Propellants

Reusable

Low EarthGeostationary Orbit

In Development

On the way engine

Announcement Pending

On the way

Multiple Thrust Classes

Thrust

Cryogenic & Storable

Propellants

Reusable, expendable, cost-efficient

Low Earth OrbitGeostationary Orbit

Announcement Pending

Made to standards
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.

Measuring Tools

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.

Engine Assembly

Testing

All Ursa Major engines are tested and developed at our in-house facility in Colorado, allowing for unmatched control over test scheduling.

Development & Test
Measuring Tools
Engine Assembly
Development & Test

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.