Hadley Engines to Power Stratolaunch Hypersonic Test Program
Ursa Major Receives $32.9M Contract to Deliver 16 Engines
A $32.9 million contract has been awarded to Ursa Major to develop and deliver 16 upgraded Hadley H13 engines to Stratolaunch. The multi-year program extends a series of successful flight collaborations and supports a growing operational cadence.
"This contract directly supports U.S. hypersonic test infrastructure and the broader imperative to accelerate high-speed flight programs."
Dan Jablonsky, Ursa Major
The Hadley H13 is a mission-upgraded variant that increases engine reusability with additional starts, driving down cost per flight while supporting new test objectives and mission profiles.
"This contract directly supports U.S. hypersonic test infrastructure and the broader imperative to accelerate high-speed flight programs that deliver for national security," said Dan Jablonsky, CEO of Ursa Major. "As the proud partner and hypersonic propulsion provider to Stratolaunch, we're focused on getting real capability into the field – faster, at scale, and without compromising performance."
Ursa Major's Hadley engines have powered multiple successful Talon-A missions, including sustained Mach 5+ flight and vehicle recovery, demonstrating the engine's performance under operational conditions. It is America’s first oxygen-rich staged combustion engine designed for small launch and hypersonics. The engine burns a mix of Lox and kerosene and develops 5,000 lbf thrust at sea level. The vacuum variant develops 6,500 lbf of thrust.