Remotely Piloted Aircraft Help FAA Test ACAS X

Testing found that the technology’s “behavior and output” change between en route and terminal airspace.

Jack Daleo

Tuesday, April 07, 2026 at 02:45 PM ET

Verified

Edited By:

Zach Vasile

Reliable Robotics’ automated Cessna Caravan and Cessna 182 “intruder” aircraft sit on the tarmac at San Martin Airport (E16) in California. [Credit: Reliable Robotics]

Key Takeaways:

The FAA is actively developing certification standards for large uncrewed aircraft systems (UAS) over 55 pounds, using data from recent flight tests conducted with Reliable Robotics.
Reliable Robotics successfully completed a contract for the FAA, demonstrating its Detect and Avoid (DAA) system, which uses advanced radar and ACAS Xu technology to prevent collisions with both cooperative and non-cooperative aircraft in various airspace scenarios.
These real-world data collection efforts are crucial for establishing comprehensive FAA standards for safe UAS integration and are part of Reliable Robotics' broader goal of achieving full "takeoff to touchdown" flight autonomy for cargo and eventually passenger aircraft.

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Remotely piloted aircraft are flying in and around airports to help the FAA develop certification standards for large uncrewed aircraft systems (UAS).

The data collection flights in and around the terminal area of Hollister Municipal Airport (KCVH) in California are intended to guide the FAA and standardization bodies in their quest to safely integrate larger UAS models. The FAA has regulations for small UAS, such as delivery drones, but they do not cover models weighing over 55 pounds.