Sabre.
The engine that
changes everything.


The engine that changes everything.
A truly versatile propulsion system – SABRE is an air-breathing rocket engine that can propel an aircraft from zero to five times the speed of sound in the atmosphere and 25 times the speed of sound for space access. Highly scalable, this pioneering breakthrough boasts a huge range of operation with the potential to redefine what’s possible in the world of powered flight.
- SABRE technology can operate in both air-breathing and rocket modes
- Precooler validated at hypersonic heat conditions
- Mach 5 for hypersonic flight
- Mach 25 for space access
- Scalable for multiple applications
click the engine to find out more

Ramjet System
Improves overall engine efficiency by using surplus air to generate extra thrust.
Engine Core
Powers SABRE during air-breathing flight. Heat absorbed by the precooler is recycled to power the engine, significantly reducing fuel consumption.
Precooler
Rapidly cools the incoming air (1,000 °C to ambient) enabling SABRE to operate at higher speeds than existing engines.
Supersonic Intake
Captures and slows the incoming air into the engine and can operate at speeds in excess of Mach 5 before closing for rocket mode.
Main Nozzle
Operates in both the atmosphere and in space, reducing weight and complexity.
Rocket Engine
Provides thrust to power the engine for space access during rocket mode.
Air Compressor
Driven by the energy absorbed in the precooler, enabling runway start and takeoff.
Nacelle
Advanced materials designed to withstand extreme temperature conditions.

Ramjet System
Improves overall engine efficiency by using surplus air to generate extra thrust.
Engine Core
Powers SABRE during air-breathing flight. Heat absorbed by the precooler is recycled to power the engine, significantly reducing fuel consumption.
Precooler
Rapidly cools the incoming air (1,000 °C to ambient) enabling SABRE to operate at higher speeds than existing engines.
Supersonic Intake
Captures and slows the incoming air into the engine and can operate at speeds in excess of Mach 5 before closing for rocket mode.
Main Nozzle
Operates in both the atmosphere and in space, reducing weight and complexity.
Rocket Engine
Provides thrust to power the engine for space access during rocket mode.
Air Compressor
Driven by the energy absorbed in the precooler, enabling runway start and takeoff.
Nacelle
Advanced materials designed to withstand extreme temperature conditions.
With a clear ground test and development programme.

Applied Technologies
From outer space
to your place.
We apply what we learn from our space technology to help diverse industries become more efficient and sustainable.