Propulsion startup Phase Four has signed a memorandum of understanding with satellite refueling startup Orbit Fab aimed at preparing future Phase Four Maxwell engines for on-orbit refueling.

Phase Four’s Maxwell engines deliver high end plasma performance with novel high duty cycle operations

Phase Four’s propellant-agnostic RF Thruster is poised to enable new ‘multi-mode’ propulsion capabilities on government and commercial spacecraft.

RFT also possesses a second silver bullet: the power electronics are much simpler than legacy EP systems, making them highly compact, and significantly lighter.

Phase Four’s flight proven electric propulsion systems dramatically reduce costs and lead times for satellite constellation manufacturing and deployment

Capella Space launched its fourth synthetic aperture radar satellite June 30 with a Maxwell electric thruster manufactured by propulsion startup Phase Four.