Orbital Corporation Secures Follow-Up Orders After Successful 150HFE Propulsion System Flight with AATI's AiRanger UAV

7 min read | July 24, 2026 10:22 AM AEST | By Shwetambri Chauhan

Perth-based Orbital Corporation Limited (ASX:OEC), a leading designer and manufacturer of heavy fuel propulsion systems for unmanned aerial vehicles, has achieved a major milestone by completing the inaugural flight test of its 150HFE propulsion system installed on American Aerospace Technologies Inc.'s AiRanger UAV. In response to this successful validation, AATI has placed an additional order for three propulsion units, increasing total commitments to eight systems along with engineering integration services valued at over US$750,000. This accomplishment marks a pivotal advancement in Orbital's commercial partnership initiatives and paves the way for recurring revenue through its Power by the Hour service model.

Key Highlights

  • Orbital Corporation Limited (ASX:OEC) is a Western Australian company specializing in integrated heavy fuel propulsion systems for Group 2 and Group 3 UAVs, backed by more than 40 years of engineering expertise.
  • The 150HFE propulsion system successfully completed its first flight aboard AATI's AiRanger UAV, confirming effective integration and reliable performance in operational conditions.
  • AATI’s follow-on order for three additional 150HFE units raises total orders to eight, valued above US$750,000, with shipments of these systems commencing this week.
  • Orbital anticipates further propulsion system orders and recurring revenue via its Power by the Hour maintenance model as AATI expands its UAV fleet.

150HFE Propulsion System’s Maiden Flight Validates Integration with AiRanger UAV

Orbital Corporation’s 150HFE propulsion system achieved a critical validation milestone by completing its first flight on American Aerospace Technologies Inc.’s AiRanger unmanned aircraft. This successful test confirms the propulsion system’s seamless integration and dependable performance within real-world operational environments, addressing the complex engineering challenges of incorporating a heavy fuel engine into UAV platforms. The achievement underscores Orbital’s capability to meet the stringent performance standards demanded by modern UAV operators.

Following this milestone, AATI placed a follow-up order for three additional 150HFE propulsion systems, increasing total commitments to eight units and engineering integration services valued at over US$750,000. Orbital plans to ship these additional units this week to support AATI’s ongoing flight testing and fleet growth. The swift transition from initial flight success to repeat orders demonstrates AATI’s strong confidence in Orbital’s propulsion technology, validating the company’s engineering approach and product maturity.

AATI’s Commercial BVLOS Approvals Enhance Competitive Position for Fleet Growth

AATI operates its AiRanger UAV under commercial Beyond Visual Line of Sight (BVLOS) approvals in the U.S., providing a significant competitive edge in the long-endurance unmanned operations sector. BVLOS certification allows extended missions over vast distances without continuous visual aircraft monitoring, enabling AATI to pursue government and commercial contracts requiring sustained aerial operations such as intelligence, surveillance, and reconnaissance (ISR). This regulatory advantage aligns with Orbital’s propulsion systems’ proven reliability in demanding environments.

Orbital’s management views AATI’s BVLOS approvals and operational expertise as a meaningful market advantage, positioning the company to expand its fleet and capitalize on government UAS programs. This synergy creates opportunities for additional propulsion system sales and transitioning AATI’s UAVs into Orbital’s Power by the Hour service, generating long-term recurring revenue.

Orbital’s Proven Reliability in Naval and Maritime UAV Operations

Orbital’s propulsion systems have logged over one million in-service flight hours supporting U.S. Naval operations, demonstrating exceptional durability in harsh maritime environments characterized by high winds and corrosive salt spray. This extensive operational experience with Tier 1 defense clients including Boeing, Textron, and L3 Technologies validates Orbital’s engineering excellence and manufacturing quality, solidifying its status as a global leader in UAV heavy fuel engine technology.

This maritime operational pedigree aligns with AATI’s strategic goals to deploy AiRanger UAVs globally in similar challenging conditions, providing confidence in the propulsion system’s reliability and reinforcing the strong strategic partnership between the two companies.

Advanced 150HFE Technology Enables Multi-Fuel Use and Extended Flight Endurance

Orbital’s 150HFE propulsion system features patented Flex DI™ direct injection technology, offering up to 40% improved fuel efficiency over traditional injection systems. This efficiency enhances UAV operational range and endurance, allowing longer flight durations or reduced fuel loads. The 150HFE supports multiple fuels including JP-5, JP-8, Jet-A, and gasoline, providing operational flexibility for military and commercial operators in remote areas. It also boasts a 750-hour Time Between Overhaul rating, reducing maintenance frequency and operational costs.

Additional features include cold-start capability within two minutes for rapid mission readiness. Orbital’s engine lineup spans 50cc to 350cc HFE models, covering Group 2 and Group 3 UAV requirements. The 150HFE represents a mature, extensively tested design tailored to meet the demands of long-endurance UAV missions prioritized by operators like AATI.

Power by the Hour Model Drives Sustainable Recurring Revenue Streams

Orbital’s Power by the Hour (PBH) model generates recurring revenue through engine maintenance, overhaul, and support services based on actual flight hours. Customers pay per flight hour, transferring maintenance risk and logistics to Orbital while ensuring predictable revenue for the company. As AATI’s fleet grows and enters full operational service, Orbital anticipates transitioning this relationship into a PBH arrangement, complementing initial propulsion system sales with ongoing service income.

CEO Stephen Pearce emphasized the strategic value of combining upfront hardware sales with long-term service revenue, highlighting the importance of customers capable of building and operating substantial UAV fleets. This dual-revenue approach aligns with Orbital’s customer selection strategy and supports sustainable growth.

US Government ISR Contracts Offer Significant Expansion Potential for AATI

AATI is actively targeting government contracts focused on long-endurance Intelligence, Surveillance, and Reconnaissance (ISR) missions, which require reliable, extended flight capabilities. These government programs represent lucrative opportunities backed by sizeable defense budgets. AATI’s commercial BVLOS approvals and operational experience position it strongly to compete for such contracts, potentially expanding its fleet significantly.

Orbital recognizes AATI’s competitive advantage in pursuing U.S. government UAS programs, which typically involve multi-year contracts and sustained revenue streams. The successful 150HFE flight on AiRanger provides critical performance validation supporting contract bids. Should AATI secure major government ISR contracts, Orbital’s propulsion system orders and PBH revenue could grow substantially beyond the current eight-unit commitment.

Four Decades of Engineering Heritage and Tier 1 Defense Partnerships Strengthen Orbital’s Market Leadership

With over 40 years of expertise in heavy fuel propulsion systems, Orbital Corporation has established trusted relationships with Tier 1 defense contractors such as Boeing, Textron, and L3 Technologies. These partnerships validate Orbital’s technical prowess, manufacturing standards, and compliance with rigorous defense requirements, creating a competitive moat difficult for new entrants to match.

Orbital’s extensive operational history and defense industry connections position it as a global leader in UAV heavy fuel engines, providing customers like AATI with confidence in long-term reliability and supplier viability. This market stature facilitates customer acquisition and supports sustained business growth.

ASX Listing Enhances Capital Access for Growth and Manufacturing Scale-Up

Listed on the Australian Securities Exchange (ASX) under ticker OEC, Orbital Corporation benefits from capital market access to fund growth initiatives, expand manufacturing capacity, and pursue strategic projects. The ASX listing ensures corporate governance compliance and shareholder transparency while enabling equity financing to support demand from customers like AATI and new product development.

Headquartered in Perth, Western Australia, Orbital leverages its ASX presence to boost global market visibility and business development. The successful partnership with AATI and follow-on orders highlight Orbital’s commercial traction, offering ASX investors insight into the company’s growth potential and strategic execution.

Upcoming Milestones and Growth Outlook Post-AATI Flight Validation

Orbital’s immediate focus is the shipment of three additional 150HFE propulsion systems to AATI this week, facilitating continued flight testing and fleet expansion. These deliveries will maintain Orbital’s manufacturing momentum and support AATI’s transition from validation flights to operational deployment.

Future growth depends on AATI’s progress with government contracts, commercial customer acquisition, and fleet scaling. Investors should monitor AATI’s announcements as these developments will influence Orbital’s propulsion system order volume and Power by the Hour revenue potential. Orbital’s management regards the AATI partnership as a cornerstone of its long-term growth strategy in commercial and government UAV markets.


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