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  1. Portal Space: Solar Thermal Propulsion (STP) Test Success

    Portal Space Systems, a Mach33 portfolio company, has successfully tested its solar thermal propulsion system (Flare) at full power inside a vacuum chamber, validating its 3D-printed heat exchanger under flight-representative thermal stress. The s...
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  2. Forbes: The Age Of Space Maneuver Warfare Is Imminent

    Retired Lt. Gen. John Shaw, former Deputy Commander of U.S. Space Command, published an article in Forbes on April 6, 2026 arguing that the U.S. Space Force and U.S. Space Command will pivot toward space maneuver warfare and away from positional s...
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