Ursa Major Technologies Inc.

Founded in 2015, Ursa Major wants to build engines for companies building small launch vehicles
The company successfully designed and built two liquid oxygen and kerosene engines and has a third engine in development




The completely newly designed third engine "Arroway" is now in development.
It is based on a staged combustion cycle and is said to deliver a significant
thrust of 890 kN.
The combination methane/LOX is planned as propellant.

  "Hadley" and "Ripley" engines in comparison


"Hadley" vacuum engine

"Hadley" rocket engines for serial production

"Hadley" turbopump

"Hadley" (22 kN of thrust)

"Ripley" and "Hadley"turbopumps

"Ripley" engine combustor (left) for 156 kN of thrust