Reliable Robotics and the race to certify autonomous cargo planes

Reliable Robotics, a Mountain View, California company founded in 2017 by former SpaceX engineer Robert Rose and cofounder Juris Pugejs, is working to certify remotely operated cargo planes for the U.S. national airspace. Their approach — retrofitting the proven Cessna 208 Caravan with automation systems while keeping a human pilot on the ground — represents one of the most pragmatic paths toward unmanned commercial flight.

What Is Reliable Robotics Actually Building?

The system is a remotely operated aircraft system, not a fully autonomous one. That distinction matters. A human pilot remains in the loop at all times, making decisions and monitoring the flight from a ground station rather than the cockpit.

This is a deliberate engineering and regulatory strategy. By keeping a human operator in active control, Reliable Robotics simplifies the certification conversation with the FAA considerably. The technology to make an airplane fly itself has existed for decades — autoland systems date back to the 1960s. The real challenge has always been convincing regulators, insurers, and the public that removing the pilot from the cockpit is safe.

Why the Cessna Caravan?

Reliable Robotics pursued a supplemental type certificate (STC) for the Caravan rather than designing a new airframe. The Caravan is a workhorse — it flies FedEx packages, serves bush communities in Alaska, and hauls cargo worldwide. It’s simple, reliable, and well understood.

By modifying an existing certified aircraft, the company sidesteps years of airframe certification work and focuses entirely on the automation system itself. FedEx alone operates roughly 300 Caravans through its feeder network, making the Caravan the ideal platform for proving the concept.

How Does the Technology Work?

The system’s core is a triple-redundant flight control computer. Three independent processors run simultaneously, comparing outputs in real time. If one disagrees with the other two, it gets voted out. If two disagree, the system operates on the third while flagging the discrepancy. This redundancy architecture comes directly from spaceflight engineering.

The aircraft also carries a detect-and-avoid system combining radar, ADS-B In, and additional sensors for traffic and terrain awareness. The ground operator sees a synthetic vision display similar to a modern glass cockpit, rendered at a desk in a control room.

In late 2023, Reliable Robotics flew a Caravan with no one on board — the aircraft taxied, took off, flew a pattern, and landed, all controlled from a ground station at an airport with air traffic control coordination.

Why Cargo Operations Need This

The U.S. pilot shortage hits the cargo feeder world harder than the airlines. Small operators fly single-engine turboprops and light twins into small airports, often at night, often in weather, for modest pay. Staffing these operations is increasingly difficult.

Removing the pilot from the cockpit doesn’t just save salary costs. It eliminates crew rest requirements, eliminates positioning flights, allows more flight hours per aircraft per day, and makes routes economically viable that can’t justify a crewed flight today.

That last point matters most. Communities across rural America have lost air cargo service because the economics didn’t work. A remotely operated Caravan flying a nightly package run could restore those routes.

What Are the Major Challenges?

Certification remains the tallest hurdle. The FAA has never certified a remotely piloted aircraft of this size for operations in the national airspace outside restricted areas. The agency has been more forward-leaning than expected, but regulatory timelines measured in years, not months, are realistic. Reliable Robotics has targeted mid-decade for first commercial operations, though that could slip to 2027 or 2028.

Communications link integrity is another concern. When the pilot is on the ground, everything passes through a data link. Reliable Robotics says the system handles communication losses by following pre-programmed contingency procedures, flying to a predetermined safe outcome. How the FAA evaluates those contingency plans is still being worked out.

Weather presents challenges that sensors alone can’t fully address. A human pilot’s judgment calls about icing, turbulence, and visibility are difficult to replicate remotely. For daytime visual conditions, this is manageable. For night IMC flights into uncontrolled fields — exactly the kind of flying FedEx feeders do — the bar is much higher.

Airport infrastructure may be the most underappreciated challenge. An uncrewed airplane at a major airport must integrate into surface movement systems, communicate with ground control, and avoid ground vehicles. Reliable Robotics has demonstrated autonomous taxi capability, but scaling to busy airports with mixed crewed and uncrewed traffic is a systems integration problem that extends well beyond the airplane.

How Does Reliable Robotics Compare to Competitors?

Xwing, also California-based, has developed autonomous cargo conversion for the Caravan with a greater emphasis on full autonomy and less on remote piloting. Merlin Labs, based in Boston, focuses on autonomous flight systems for military and defense applications with eventual commercial ambitions.

What distinguishes Reliable Robotics is their discipline about keeping a human in the loop and their background in high-reliability systems engineering. Their approach is less flashy than full autonomy but more certifiable — and in aviation, certifiable is what matters.

What Does This Mean for Pilots?

In the near term, the impact on the pilot profession is minimal. This technology targets single-pilot cargo operations, not passenger flights. The psychological and regulatory barriers to pilotless passenger flight are orders of magnitude higher than for cargo.

Over a 20- to 30-year horizon, if remote cargo operations prove safe and reliable, the conversation will shift around what a pilot does and where they need to sit while doing it. Remote piloting could serve as a bridge technology — starting with one ground pilot per aircraft, eventually shifting to one pilot supervising multiple aircraft, and ultimately evolving the human role from active pilot to supervisor and exception handler.

Potential Benefits for General Aviation

The detect-and-avoid sensors, precision approach and landing systems, and enhanced situational awareness tools being developed for unmanned operations could eventually reach crewed aircraft as advanced safety systems. An autonomous recovery mode that activates if a pilot becomes incapacitated — using building blocks being flight-tested today — is a realistic near-future application.

The Business Model Behind It All

Reliable Robotics has raised over $100 million in venture funding from investors including Eclipse Ventures and Coatue Management. Rather than selling airplanes, the company is positioning to sell aviation as a service — regional cargo operators would contract with Reliable Robotics for automated flights, with the company providing the automation system, ground pilots, and operational infrastructure.

Whether that model works within aviation’s razor-thin margins and regulatory overhead remains to be seen. But the technical demonstrations are real, the FAA engagement is substantive, and market demand for more efficient cargo operations is undeniable.

Key Takeaways

• Reliable Robotics is retrofitting Cessna Caravans for remotely piloted cargo flights, keeping a human operator on the ground rather than pursuing full autonomy
• Triple-redundant flight computers and detect-and-avoid sensors provide the technical foundation, with a successful uncrewed flight demonstrated in late 2023
• FAA certification is the primary bottleneck, with first commercial operations possible by mid-decade but potentially slipping to 2027–2028
• The cargo feeder market is the target, where pilot shortages and thin economics make unmanned operations most compelling
• Technology developed for unmanned cargo flights could eventually enhance safety in crewed general aviation aircraft