UAV & Drones
Reliable Robotics Advances ACAS Xu Flight Testing for FAA Certification
Reliable Robotics conducts extensive flight tests of ACAS Xu Detect and Avoid system near Hollister, California, supporting FAA certification efforts.

This article is based on an official press release from Reliable Robotics.
Introduction to ACAS X Flight Testing
As the aviation industry pushes toward the integration of uncrewed aircraft systems (UAS) into the National Airspace System (NAS), advanced collision avoidance technologies are becoming critical. Reliable Robotics recently announced significant progress in this area, detailing a comprehensive flight test campaign for its Detect and Avoid (DAA) system. According to a company press release, this initiative is part of an ongoing contract with the Federal Aviation Administration (FAA) to provide validation data for certifying DAA systems based on the Airborne Collision Avoidance System X (ACAS X).
The testing focuses on ACAS Xu, a variant specifically designed for autonomous fixed-wing aircraft. By integrating this algorithm with air-to-air radar and other sensors, Reliable Robotics aims to create an FAA-certifiable DAA solution capable of operating under Instrument Flight Rules (IFR) across all airspace classes. This development marks a crucial step in ensuring that uncrewed aircraft can safely share the skies with traditional, piloted traffic.
Advancing ACAS X for Uncrewed Systems
The FAA has been developing the ACAS X family of algorithms to modernize and improve upon the legacy Traffic Alert and Collision Avoidance System II (TCAS II). The new suite includes several versions tailored to different aircraft types: ACAS Xu for fixed-wing UAS, ACAS Xr for rotorcraft, and ACAS Xa as a direct replacement for TCAS II in transport-category aircraft. The primary advantage of ACAS X is its ability to reduce unnecessary alerts, particularly in terminal areas, while enhancing overall safety and separation.
Reliable Robotics is leveraging the ACAS Xu variant as it works toward a Supplemental Type Certificate (STC) to convert the Cessna 208B Caravan into a fully uncrewed aircraft system. In their official statement, the company noted that their DAA solution will provide surveillance against both cooperative and non-cooperative traffic, a vital requirement for safe airspace integration.
Flight Test Campaign Details
Simulating Real-World Encounters
To validate the system, Reliable Robotics has transitioned from Hardware In The Loop (HITL) testing to a rigorous, month-long flight test campaign. The company reports that the campaign involves over 50 scripted encounters in and around the terminal area of the Hollister public airport (KCVH) in California.
During these tests, Reliable’s Cessna 208B (registration N927FE) flies RNAV approaches under the control of an advanced automation system, commanded by a remote pilot located 50 miles away. Simultaneously, an instrumented Cessna 182 acts as an “intruder” aircraft, flying converging paths to create specific encounter geometries. The encounters are meticulously planned to simulate a loss of safe separation while maintaining strict safety margins, particularly near the closest point of approach (CPA).
“Successful completion of each encounter requires meticulous planning, close communication between the remote pilot and intruder pilot, and precise execution,” Reliable Robotics stated in their release.
Testing Minimum Equipage Scenarios
A key component of the flight test campaign is evaluating the DAA system’s performance against aircraft with minimal cooperative equipment. The Cessna 182 intruder is outfitted with the minimum viable equipment set required for compliance with current FAA ADS-B OUT mandates, a configuration common among smaller, older general aviation aircraft.
Because ADS-B OUT relies on GPS data, its integrity must be independently validated. Reliable Robotics explains that Mode C omnidirectional interrogation is insufficient for this task. Instead, their system uses an integrated non-cooperative track source, such as radar, to validate the ADS-B tracks and provide complete positional data. This ensures that accurate collision avoidance alerts can be issued even when encountering minimally equipped traffic.
Regulatory and Financial Backing
The push for advanced collision avoidance technology has strong backing at the federal level. The FAA has been funding research and development for ACAS X since 2008. Furthermore, Reliable Robotics highlighted that the Senate Transportation, Housing and Urban Development, and Related Agencies’ draft appropriations bill for Fiscal Year 2026 allocates $16 million specifically for continued ACAS X development.
This sustained financial support underscores the growing focus on modernizing airspace safety technologies to accommodate new entrants without compromising the safety of existing NAS stakeholders.
AirPro News analysis
We view the successful validation of ACAS Xu through real-world flight testing as a major milestone for the UAS industry. By proving that uncrewed systems can reliably detect and avoid both cooperative and non-cooperative traffic, even those with minimal ADS-B equipage, companies like Reliable Robotics are dismantling one of the most significant technical barriers to routine beyond visual line of sight (BVLOS) operations. We note that the $16 million allocation in the FY 2026 draft appropriations bill further signals that lawmakers view ACAS X not just as an experimental project, but as foundational infrastructure for the future of the National Airspace System.
Frequently Asked Questions
What is ACAS X?
ACAS X (Airborne Collision Avoidance System X) is a family of collision avoidance algorithms developed by the FAA to replace and improve upon legacy TCAS II systems. It includes variants for transport aircraft, rotorcraft, and uncrewed systems.
What aircraft is Reliable Robotics using for these tests?
Reliable Robotics is using a Cessna 208B Caravan (N927FE) equipped with their DAA system, and a Cessna 182 acting as the intruder aircraft.
Where are the flight tests taking place?
The flight tests are being conducted in and around the terminal area of the Hollister public airport (KCVH) in California.
Sources
Photo Credit: Reliable Robotics
UAV & Drones
French Navy Orders Airbus U010 Aliaca VTOL Drone Variant
France’s DGA converts 7 Aliaca systems to VTOL configuration, enabling French Navy ops on smaller vessels from late 2026.

The French Defence Procurement Agency (DGA) has ordered the vertical take-off and landing (VTOL) variant of the Airbus U010 Aliaca drone, converting the final seven systems of an existing 34-system contract to the new configuration.
Announced by Airbus on October 29, 2026, the shift to a VTOL platform eliminates the need for catapult launches and net recoveries. This capability allows the French Navy to deploy the intelligence, surveillance, and reconnaissance (ISR) drones on smaller secondary vessels and operate them in rougher sea conditions.
Operational expansion and technical specifications
The French Navy first operated the fixed-wing Aliaca on an offshore patrol vessel in 2019. The original system required a catapult for launch and an automated net for recovery. While effective, this infrastructure limited the types of vessels that could host the drone and restricted operations in heavy seas.
According to French Navy officials, the VTOL capability significantly expands deployment options. Pre-flight preparation takes only a few minutes, and the drone can launch in sea conditions that would have previously prevented a safe net recovery.
Maxime Caille, Director of the U010 Aliaca programme at Airbus Helicopters, noted that adding vertical lift to the existing drone required a new wing design and modified fuselage. The VTOL variant retains the same core autopilot and data link components as the fixed-wing model.
The U010 Aliaca VTOL has a maximum take-off weight of 25 kilograms, a wingspan of 3.6 meters, and a length of 2.2 meters. The 100% electric version offers up to three hours of endurance and a 50-kilometer data link range. A hybrid variant extends endurance to six hours and the operational radius to 100 kilometers. Both versions carry a gyro-stabilized electro-optical/infrared (EO/IR) sensor turret with a 30x optical zoom and an Automatic Identification System (AIS) for tracking maritime vessels.
Deployment timeline and fleet integration
Following a trial period conducted between 2024 and 2025, the DGA requested that the final seven systems of the original 34-system order be delivered in the VTOL configuration. Airbus has already delivered 27 fixed-wing systems to the DGA.
Deployment of the VTOL variant will begin on French Navy Metropolitan Support and Assistance Vessels (BSAMs) in late 2026. In 2027, the systems will roll out to Overseas Support and Assistance Vessels (BSAOMs).
The French Navy utilizes the U010 Aliaca, designated as the SMDM in military service, for gathering real-time intelligence during maritime security missions, combating illegal fishing, and monitoring trafficking. Real-time video feeds allow operations rooms to vector interception craft and evaluate target threats.
Airbus UAS consolidation and programme background
The Aliaca drone was originally designed by Survey Copter, a French light tactical drone manufacturer that Airbus acquired in 2011. In October 2025, Airbus Helicopters formally took over the management of Survey Copter’s uncrewed aircraft systems (UAS) programs, including the Aliaca and Capa-X lines, to streamline the company’s aerospace offerings.
The U010 Aliaca is a Category 2 tactical UAS certified to SAIL III standards under the European Union Aviation Safety Agency (EASA) Specific Operations Risk Assessment (SORA) methodology.
In early October 2026, Airbus demonstrated the platform’s interoperability during the MDays event. The company executed a collaborative crewed-uncrewed teaming scenario featuring the U010 Aliaca, the U030 Flexrotor, and an Airbus H130 helicopter operating in real-world conditions.
AirPro News analysis
The DGA’s decision to convert the remainder of its Aliaca order to the VTOL configuration highlights a broader naval shift away from catapult-and-net recovery systems. While fixed-wing drones offer superior endurance and range, the deck space and structural requirements for launch and recovery equipment restrict them to larger surface combatants. By integrating vertical lift capabilities into a fixed-wing airframe, Airbus provides the French Navy with the endurance necessary for extended maritime patrol while enabling operations from secondary support vessels. We expect this hybrid aerodynamic approach to become the baseline requirement for future shipborne tactical UAS procurements.
Photo Credit: Airbus
UAV & Drones
GA-ASI Opens MQ-9A Remote Split Operation Facility in North Dakota
GA-ASI opens a North Dakota RSO facility for AFRICOM MQ-9A missions, projecting over $10M in annual DoD savings.

General Atomics Aeronautical Systems, Inc. (GA-ASI) has opened a new Remote Split Operation (RSO) facility near Grand Forks, North Dakota, relocating MQ-9A Remotely Piloted Aircraft (RPA) flight crews from Africa to the continental United States.
The facility, officially opened during an October 30, 2026, ribbon-cutting ceremony, will support U.S. Africa Command (AFRICOM) missions under a Contractor-Owned, Contractor-Operated (COCO) lease. According to a company press release, the transition to stateside operations is projected to save the U.S. Department of Defense more than $10 million annually while reducing the overseas footprint of contractor personnel.
Transitioning to domestic remote operations
The RSO model allows the physical aircraft to remain deployed in foreign theaters while the flight crews operate the platforms from domestic control stations. This operational shift minimizes the risk to personnel deployed overseas and significantly lowers the logistical costs associated with maintaining forward-deployed crews.
GA-ASI Chief Executive Officer Linden Blue highlighted the dual benefits of the new North Dakota facility during the opening event.
“We’re excited to establish this new facility in North Dakota. Setting up our remote flight operations here in North Dakota will allow us to decrease the number of personnel required overseas, significantly reducing the cost of the COCO to the U.S. government and, more importantly, significantly increase the safety for our personnel. It will also bring approximately 50 well-paying jobs to the Grand Forks community.”
The U.S. military utilizes COCO leases to augment its organic fleet capabilities. Under this arrangement, contractor pilots operate the aircraft on behalf of combatant commands, providing intelligence, surveillance, and reconnaissance data directly to military end-users.
U.S. Senator John Hoeven (R-ND), who worked through the Senate Defense Appropriations Committee to facilitate the project, emphasized the financial and strategic advantages of the relocation.
“General Atomics is moving pilots from Africa to Grand Forks to remotely fly their missions for AFRICOM. Doing so makes perfect sense, and that’s why we worked through the Senate Defense Appropriations Committee to make it happen. This new facility is not only a real cost savings for AFRICOM, which will save more than $10 million per year as pilots operate from Grand Forks rather than overseas, but it also brings a broader intelligence, surveillance and reconnaissance portfolio to our state.”
A decade of expansion at the Grand Forks flight center
The new RSO facility is located at GA-ASI’s Flight Test & Training Center (FTTC), situated within the GrandSky UAS Business Park adjacent to Grand Forks Air Force Base. The FTTC began operations on July 18, 2016, established to provide the manufacturer with dedicated airspace and facilities for flight testing, aircraft maintenance, and aircrew training.
The addition of active AFRICOM mission support builds on the company’s extensive history with uncrewed platforms. GA-ASI’s Predator line of Uncrewed Aircraft Systems (UAS) has been in operation for 30 years, accumulating more than 9 million total flight hours across various military and government operators.
The MQ-9A Reaper, the primary aircraft supported by the new RSO facility, is a medium-altitude, long-endurance (MALE) remotely piloted aircraft designed for persistent surveillance and strike capabilities. By operating the MQ-9A from the North Dakota facility, GA-ASI integrates active combatant command support into a site previously focused primarily on testing and training.
AirPro News analysis
The expansion of Remote Split Operations for COCO leases represents a maturation of how the U.S. Department of Defense procures and manages uncrewed intelligence gathering. By decoupling the aircrew from the physical aircraft deployment, combatant commands like AFRICOM can maintain persistent surveillance coverage over vast geographic areas without the political and logistical friction of expanding overseas troop or contractor footprints. This model effectively treats uncrewed aerial surveillance as a managed service, shifting the burden of personnel security and basing infrastructure back to the manufacturer’s domestic facilities.
Photo Credit: General Atomics
UAV & Drones
Saab LoyalEye AEW Radar Flight-Tested on GA-ASI MQ-9B
Saab and GA-ASI successfully flight-tested the LoyalEye radar on an MQ-9B, validating unmanned airborne early warning capability.

Saab AB and General Atomics Aeronautical Systems, Inc. (GA-ASI) have successfully flight-tested an unmanned airborne early warning capability by integrating the Saab LoyalEye radar onto an MQ-9B remotely piloted aircraft system. The October 28, 2026 announcement validates the system’s ability to detect, track, and classify airborne targets during a representative operational scenario.
The milestone, detailed in a joint press release, demonstrates the viability of conducting persistent surveillance missions without exposing human aircrews to high-risk environments. The integrated platform is designed to operate either independently or in coordination with manned Airborne Early Warning and Control (AEW&C) aircraft.
Validating unmanned early warning capabilities
The flight test took place at GA-ASI’s Desert Horizon Flight Operations Facility in Southern California. During the flight, the MQ-9B utilized the LoyalEye radar to perform airborne early warning (AEW) tasks traditionally reserved for manned aircraft. The system successfully demonstrated its capacity to manage airborne targets in a realistic operational environment, proving the concept of unmanned persistent surveillance.
“This flight test marks an important milestone in the development of unmanned airborne early warning capabilities,” said Carl-Johan Bergholm, Head of Saab’s business area Surveillance. “LoyalEye is designed to complement existing AEW&C solutions by providing additional flexibility and persistence, and today’s flight validates the capability in a representative operational scenario.”
David R. Alexander, President of GA-ASI, noted the strong market demand for the integrated system among global operators.
“This has been one of the most highly anticipated flight tests we have performed,” Alexander said. “The level of customer interest in AEW capability on MQ-9B throughout the world is extremely high. It just makes sense.”
The path to the LoyalEye and MQ-9B integration
The successful demonstration follows a multi-year development timeline. Saab and GA-ASI initially announced their partnership to develop an Unmanned Airborne Early Warning (UAEW) solution in 2025. The program advanced to the flight testing stage on May 19, 2026, when the LoyalEye radar sensor completed its first flight on an unmanned aircraft at the Desert Horizon facility. That initial flight marked the beginning of a multi-month evaluation phase that culminated in the October 28, 2026 validation flight.
Saab AB, a Swedish aerospace and defense company employing approximately 31,000 people, designs and manufactures advanced systems across aeronautics, weapons, command and control, sensors, and underwater systems. GA-ASI specializes in the manufacture of remotely piloted aircraft systems, radars, and electro-optic mission systems.
Unmanned AEW capabilities are engineered to surveil large geographic areas, providing persistent coverage in operating environments where endurance and geographic reach are critical. The LoyalEye system is specifically intended to complement existing manned AEW&C solutions, such as the Saab GlobalEye, by adding operational flexibility and persistence to a military’s sensor network.
AirPro News analysis
The integration of AEW capabilities onto a Medium-Altitude Long-Endurance (MALE) unmanned platform like the MQ-9B represents a structural shift in how Air Forces can deploy surveillance assets. Manned AEW&C platforms are high-value, low-density assets that are expensive to operate and vulnerable in contested airspace. By offloading routine or highly persistent radar coverage to an unmanned system, operators can preserve manned assets for complex battle management tasks. We expect this capability to generate significant interest among nations that already operate the MQ-9B or are looking to expand their maritime and border surveillance networks without the procurement costs of a dedicated manned AEW fleet.
Photo Credit: Saab AB
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