The Mosasaur I vacuum rocket engine is a gas generator cycle vacuum pump-pressured liquid rocket engine with liquid oxygen/liquid methane as propellant. Based on the Mosasaur I as the base platform, the Mosasaur I is evolved by replacing the large area specific nozzle extension section.
Vacuum thrust: 700kN (about 70 tons of force)
Vacuum specific impulse: not less than 350s
Push-mass ratio: not less than 60
With variable thrust adjustment ability
Bidirectional swing provides thrust vector control
Capable of multiple starts