News: Phase Four, Inc.

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15 headlines. We show the headline and the publisher's own teaser; the full story is at the source.

• Quantum Space acquires Phase Four propulsion assets SpaceNews · 22 Sep 2025 Quantum Space is acquiring propulsion technologies and facilities from Phase Four to support development of its Ranger maneuverable spacecraft.
• Startups from four nations join 2023 Hyperspace Challenge SpaceNews · 5 Oct 2023 The 2023 Hyperspace Challenge cohort includes U.S. companies Lexset.ai, Phase Four and TRL11, plus Australia’s High Earth Orbit Robotics, England-based Magdrive and Dawn Aerospace of the Netherlands.
• Phase Four demonstrates Maxwell Block 2 thruster in orbit SpaceNews · 12 Sep 2023 Phase Four’s Maxwell Block 2 radio-frequency thruster has been demonstrated on a commercial satellite.
• Phase Four adopts iodine for next-gen Max-V engine SpaceNews · 13 Oct 2022 Propulsion startup Phase Four is expanding its Maxwell plasma propulsion line by offering Max-V, an iodine-fueled engine.
• Phase Four wins DARPA contract to test novel propellant SpaceNews · 16 Feb 2022 Phase Four won a Defense Advanced Research Projects Agency contract to demonstrate the California startup’s radio frequency thruster technology with a new propellant.
• Phase Four and Orbit Fab to work on Maxwell engine refueling SpaceNews · 24 Jan 2022 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 debuts improved thruster SpaceNews · 6 Dec 2021 Satellite electric propulsion company Phase Four has completed testing of a new thruster that it says offers significantly improved performance.
• Phase Four Maxwell to test green propellant SpaceNews · 25 Aug 2021 Phase Four plans to fuel its Maxwell engine with a green propellant develop by the U.S. Air Force Research Laboratory under a contract the Southern California startup won Aug. 18 at the U.S. Space Force’s first SpaceWERX...
• Capella Space and Phase Four reveal Maxwell Engine performance SpaceNews · 30 Jun 2021 Capella Space launched its fourth synthetic aperture radar satellite June 29 with a Maxwell electric thruster manufactured by propulsion startup Phase Four.
• Phase Four announces new electric thrusters, subscription program SpaceNews · 16 Jun 2021 Phase Four announced June 16 two new electric propulsion systems that offer performance and other improvements, along with a subscription service that offers those thrusters to customers at a discount.
• Phase Four raises $26 million SpaceNews · 11 Jun 2021 Phase Four has raised $26 million in a Series B round that will allow it to accelerate production of its satellite electric propulsion systems.
• Phase Four wins Air Force contract for electric thruster development SpaceNews · 8 Apr 2021 Phase Four, a startup working on electric propulsion for satellites, has won an Air Force contract to test using an alternative propellant for its thrusters.
• Phase Four launches first plasma propulsion systems SpaceNews · 25 Jan 2021 Electric propulsion company Phase Four flew its first plasma thrusters on two spacecraft that were part of a SpaceX dedicated rideshare launch Jan. 24.
• Phase Four wins orders for smallsat electric thrusters SpaceNews · 30 Jan 2019
• Phase Four aims for constellation orders SpaceNews · 14 Oct 2018