Hadley engine
The Ursa Major Technologies Hadley is a 22-kilonewton (5,000 lbf) thrust Kerosene/LOX oxidizer-rich staged combustion cycle rocket engine.
| Country of origin | United States |
|---|---|
| Designer | Ursa Major Technologies |
| Status | Initial Production |
| Liquid-fuel engine | |
| Propellant | LOX / Kerosene |
| Cycle | Staged combustion |
| Performance | |
| Thrust, sea-level | 5,000 lbf (22 kN) |
Hadley is the first engine developed by Ursa Major Technologies. It started development in 2015, and prototypes were test fired in 2018. As of March 2022, qualification of the engine is complete and flight-ready engines have been delivered to customers.
Initial customers of the Hadley engine include Stratolaunch Systems, which has announced that they will use the Hadley engine on their Talon-A hypersonic test vehicle, and Phantom Space Corporation, who will use it on their Daytona small-lift rocket. ABL Space Systems initially announced they would use the Hadley engine for the upper-stage of their RS1 rocket, but have subsequently decided to use an internally-developed engine called E2. In April 2023, Astra revealed that the vacuum variant of the Hadley engine would power the second stage of their Rocket 4.0.