Upgraded 110 kN Sirius engine completes 116-second mission-duration hot-fire
60 FOMOGilmour Space successfully tested its upgraded orbital-class Sirius hybrid engine at Bowen Orbital Spaceport. The firing lasted 116 seconds and incorporated a planned throttle-down. The company tested new ablative materials and validated engine changes intended to address issues identified during the first Eris flight. The test represents a significant propulsion qualification milestone ahead of the second orbital test flight.
Why it matters
The duration and inclusion of post-anomaly modifications make this more meaningful than a routine static firing. The next important evidence will be qualification of the complete first-stage propulsion configuration and subsequent integrated vehicle testing.
The numbers
The team recently completed a successful full mission-duration hot-fire test of our upgraded 110 kN orbital-class Sirius hybrid rocket engine.
SourceCoverage
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Gilmour Space Technologies ·
A major milestone for our next Eris launchGilmour Space announced a successful full mission-duration hot-fire of its upgraded Sirius hybrid rocket engine at Bowen Orbital Spaceport. The test included a 116-second firing with a planned throttle-down, new ablative materials and validation of modifications developed following the Eris TestFlight1 investigation. Four Sirius engines power Eris's first stage. The company said Eris TestFlight2 was targeting early 2027.
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Gilmour Space successfully tested its upgraded orbital-class Sirius hybrid engine at Bowen Orbital S