Polaris Intelligence
Polaris
Intelligence
About
Ctrl K
Sign in
© Polaris Intelligence 2026
PrivacyTermsAdmin

Phase Four

US
commercialFounded 2015
Hawthorne, California, United States
www.phasefour.io/
Admin Edit
0.0-5.0

All verified mentions of this organization in source documents.

Under a contract awarded last year from the U.S. Air Force AFWERX program, Phase Four began working with iodine propellant.

RelationshipsCapabilityValue 4.0Oct 13, 2022Phase Four adopts iodine for next-gen Max-V engine

Phase Four is expanding its Maxwell plasma propulsion line by offering Max-V, an iodine-fueled engine.

GrowthCapabilityValue 4.0Oct 13, 2022Phase Four adopts iodine for next-gen Max-V engine

Phase Four’s product line includes Max-V, a Maxwell Block 2 variant that operates on iodine rather than noble gas propellants.

CapabilityValue 4.0Sep 5, 2022Phase Four Appoints Former NASA Administrator Jim Bridenstine as its Board of Directors

Phase Four is expanding to a 23,000-square-foot facility in Hawthorne, California later 2022.

GrowthValue 3.5Sep 5, 2022Phase Four Appoints Former NASA Administrator Jim Bridenstine as its Board of Directors

Phase Four is expanding to a 23,000-square-foot facility in Hawthorne, California later in 2022.

GrowthValue 3.5Sep 1, 2022Jim Bridenstine, Former NASA Administrator, joins Phase Four's Board of Directors

Phase Four’s first non-noble-gas-fueled engine, Max-V (which operates on iodine), is expected to be available in 2023.

PlanCapabilityValue 4.0Sep 1, 2022Jim Bridenstine, Former NASA Administrator, joins Phase Four's Board of Directors

Phase Four’s product line includes Max-V, a Maxwell Block 2 variant that operates on iodine instead of noble gas propellants.

CapabilityGeneralValue 4.0Sep 1, 2022Jim Bridenstine, Former NASA Administrator, joins Phase Four's Board of Directors

Jim Bridenstine, former NASA Administrator and former Member of Congress from Oklahoma, joined Phase Four’s Board of Directors as announced on 2022-09-01.

GovernanceValue 4.0Sep 1, 2022Jim Bridenstine, Former NASA Administrator, joins Phase Four's Board of Directors

Block 2 Maxwell utilizes Phase Four's second-generation RF Thruster and offers significant performance improvement over the Block 1 engine.

CapabilityGeneralValue 4.0Jul 4, 2022Phase Four and Impulse Space Collaborate to Develop RF Thrusters for Satellites

Phase Four's Maxwell Block 1 engine gained flight heritage in 2021 and is currently operating on several commercial small satellites.

CapabilityGeneralValue 3.5Jul 4, 2022Phase Four and Impulse Space Collaborate to Develop RF Thrusters for Satellites

Phase Four’s Hawthorne site will house a dedicated environmental testing facility that will continue to reduce the company’s industry-leading sub-4-month lead times.

CapabilityPlanGrowthValue 3.8May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four demonstrated through several 2021 production runs that Maxwell engines can be built, tested, and delivered to customers in under four months.

CapabilityPlanValue 4.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four’s Maxwell turn-key propulsion system achieved flight heritage in 2021 and is regularly utilized by small satellite operators.

CapabilityGeneralValue 3.2May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four plans to scale production at the new Hawthorne facility to support delivery of over 100 Maxwell engines annually.

PlanGrowthCapabilityValue 4.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four is performing thrust measurements with a Maxwell engine adapted to operate on iodine under an Air Force Research Laboratory-sponsored program.

CapabilityGeneralValue 4.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four will establish a dedicated R&D cell at the Hawthorne facility to support development of higher-performance thrusters and higher-power propulsion systems for larger spacecraft.

CapabilityPlanGrowthValue 4.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four finalized a lease for an expanded manufacturing facility in Hawthorne, California to support high-volume production of its Maxwell engine product line for commercial and government missions.

GrowthCapabilityRelationshipsValue 4.2May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four set the Hawthorne facility opening for early 2022-10-01.

PlanGrowthValue 3.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

The Block 2 Maxwell engine uses Phase Four’s second-generation RF Thruster and offers significant performance improvement over the Block 1 engine.

CapabilityGeneralValue 3.0May 26, 2022Phase Four’s RF Thruster Engine Manufacturing Capacity To Increase In 2022

Phase Four is performing thrust measurements with its Maxwell engine adapted to operate on iodine under an Air Force Research Laboratory–sponsored program.

CapabilityRelationshipsValue 4.0Feb 17, 2022Phase Four Wins DARPA Contract
Page4of7
Track