Gilmour Space Technologies and Hypersonix signed an agreement in Canberra on September 8, 2026, to develop a sovereign Australian hypersonic flight-test capability for domestic, allied and commercial customers. The partnership combines Gilmour Space’s rocket propulsion, launch, mission integration and flight-test operations with Hypersonix’s scramjet engines and autonomous hypersonic aircraft.
The two Queensland-based companies intend to provide more frequent and accessible testing of vehicles, subsystems and enabling technologies under representative hypersonic conditions. Potential test articles could include advanced sensors, communications equipment, guidance and control systems, propulsion components and high-temperature materials.
The companies did not disclose the agreement’s value, initial customers, launch schedule or the specific vehicles and ranges that would be used.
Hypersonic flight generally begins at Mach 5, where aerodynamic heating, shock-wave interactions and high-speed airflow create conditions that are difficult to reproduce fully in ground facilities. Flight testing is therefore essential for validating materials, control systems, sensors and propulsion hardware in an operationally representative representative environment.
The partners’ capabilities cover complementary stages of a potential test mission. A rocket booster can accelerate a payload to the speed and altitude needed for an experiment, while Hypersonix’s air-breathing scramjet technology can support sustained atmospheric flight once the required inlet conditions have been reached. Mission integration, range coordination, telemetry and flight termination systems would also be required to execute a complete test campaign.
“Defence customers need more frequent, responsive and accessible ways to test technologies in representative hypersonic conditions,” Hypersonix CEO Matt Hill said. He added that cooperation with Gilmour Space could help the companies serve Australian and allied programs, including projects conducted under AUKUS Pillar II.
Gilmour Space co-founder and CEO Adam Gilmour said the partnership would connect Australia’s emerging expertise in rockets, scramjets and hypersonic vehicles with a pathway from development through flight demonstration.
“By bringing together our complementary strengths, we can support a broader range of applications, while building sovereign capability that makes Australia a stronger and more valuable partner,” Gilmour said.
A potential role in expanding AUKUS testing capacity
Hypersonic and counter-hypersonic systems are among the advanced technologies covered by AUKUS Pillar II, the portion of the trilateral Australia-United Kingdom-United States partnership focused on capabilities beyond nuclear-powered submarines.
The three governments established the Hypersonic Flight Test and Experimentation project arrangement in November 2024 to share facilities, technical expertise and test data. The framework called for up to six trilateral flight-test campaigns through 2028, supported by a combined funding pool of US$252 million.
The Gilmour-Hypersonix agreement does not itself constitute an announced AUKUS contract. However, an integrated Australian commercial test service could address a central constraint in hypersonic development: access to flight opportunities. Limited range availability, specialized integration requirements and the cost of dedicated launch systems can create long intervals between experiments, slowing the process of identifying failures and validating revised designs.
A domestic test capability could also allow more of the engineering, integration and data-analysis work to remain in Australia while supporting allied programs where security and export-control requirements permit.
Gilmour Space is headquartered on Queensland’s Gold Coast and owns and operates the Bowen Orbital Spaceport in North Queensland. Its work spans hybrid rocket propulsion, launch vehicles, mission integration and flight operations.
Hypersonix develops reusable, autonomous hypersonic aircraft powered by hydrogen-fueled scramjet engines. Unlike conventional rockets, scramjets obtain oxygen from the atmosphere instead of carrying an oxidizer, reducing the propellant mass required during atmospheric flight. They must first be accelerated to high supersonic speeds before their engines can operate, making access to a suitable booster and launch architecture a critical part of flight testing.
Both companies are portfolio companies of Australia’s National Reconstruction Fund Corporation. Their agreement was announced during an NRF Connect event at Parliament House in Canberra.
The partners said they will now explore test solutions for Australian, allied and commercial programs while seeking to retain critical intellectual property, engineering skills, infrastructure and advanced manufacturing capacity in Australia. The next material milestones will be the identification of customers, selection of a flight architecture and range, and scheduling of an initial demonstration campaign.
