Pyka's crop dusters are in operation in the US and Brazil. In California's San Joaquin Valley, a pilot-free crop-spraying plane is flying at low altitudes. According to Russ Marotzke, a flight test engineer at Pyka, the aircraft can operate lower than a human pilot, resulting in reduced spray drift and lower chemical usage compared to traditional crop-dusting methods.
Pyka, based in a converted World War II hangar near San Francisco Bay, manufactures self-flying aircraft designed for crop spraying and cargo delivery. The company is part of a small group working to bring autonomous fixed-wing aircraft into commercial service. While urban air taxis, known as electric vertical take-off and landing (eVTOL) aircraft, have garnered significant attention, there is also a push to deploy self-flying planes for tasks like crop spraying and cargo delivery, with aspirations to eventually transport passengers.
Michael Norcia, co-founder and CEO of Pyka, envisions a future where a fleet of their planes could operate along the US east and west coasts. He believes that a fully scaled passenger operation could be achieved before the eVTOL industry.
At a Pyka test site located about 80 kilometers east of the factory, Marotzke and a colleague are testing a software update on a demonstration aircraft. Currently, around a dozen Pyka aircraft are in Brazil, where they are used for spraying crops such as cotton and soybeans, tasks previously performed by human pilots. The fully electric crop-spraying plane can fly for approximately 35 minutes and carry up to 300 liters of spray.
The aircraft, which has an 11.5-meter wingspan, is controlled via software that maps the area to be sprayed and plans the route while avoiding obstacles. The aircraft takes off smoothly and can land itself for refills and battery swaps.
Autonomous flight differs from autopilot, as it aims to manage the entire flight process with minimal human intervention. Despite operating in a more structured environment, the development of self-flying planes has been slower than that of self-driving cars, partly due to the significant investments made by tech companies in automotive technology and the stricter safety standards governing aviation.
Military interest has accelerated the development of autonomous flight technology, with many companies securing defense contracts to demonstrate their systems. In the US, Pyka's crop sprayer is the largest autonomous fixed-wing aircraft approved for commercial civilian use, having received authorization last year. Operations are currently limited to agricultural settings and require a ground operator and visual observer. Similar approval has been granted in Brazil, where regulations are more lenient.
Pyka aims to increase production from around two dozen planes annually to 1,000 by 2030, with each aircraft priced at $550,000. In the UK, Windracers is seeking permission to launch an autonomous cargo service in Shetland and Orkney, which would be the first heavy-lift air cargo service by drone in the UK.
Proponents of autonomous aircraft argue that they could alleviate pilot shortages, reduce risks in hazardous tasks like crop spraying, enhance efficiency, and lower costs by allowing one operator to manage multiple planes. They also suggest that automation may improve safety, as evidenced by the decline in accidents with the introduction of more automated systems.
However, the US Air Line Pilots Association (ALPA) has expressed concerns about the safety implications of removing pilots. The National Agricultural Aviation Association has noted that small uncrewed aircraft can be difficult for pilots to see and that piloted planes can cover larger areas more quickly.
Pyka and Windracers are developing new aircraft specifically designed for autonomy, while others, like Reliable Robotics, are retrofitting existing planes. Reliable Robotics is testing its autonomous system on the Cessna 208B Grand Caravan, focusing on safety certification. Merlin Labs is applying its technology to larger military aircraft and plans to adapt it for commercial cargo planes.
The companies differ in their approaches to artificial intelligence (AI). Reliable Robotics is avoiding AI to simplify certification, while Merlin is integrating AI to enhance detection and classification of objects. The challenge of replicating a pilot's ability to navigate around other aircraft and obstacles remains significant, with companies employing various sensor systems for backup.
Reliable has added air-to-air radar for early detection of other aircraft, while Merlin uses AI-powered cameras. Pyka has utilized lidar for obstacle detection and plans to incorporate AI-powered cameras for improved object recognition.
Communication with air traffic control is another challenge, with Reliable opting for a remote pilot to manage communications, while Merlin aims to use generative AI for autonomous responses.
While fully autonomous passenger flights may still be a distant goal, the advancements in technology are expected to eventually enhance safety in piloted aviation, a development that ALPA welcomes.