Photo voltaic drone with wingspan wider than jumbo jet may fly for months

A solar-powered surveillance drone with a wingspan bigger than a Boeing 747 jumbo jet may fly for weeks or months at a time, in response to its operator, whereas looking ahead to drug-smuggling vessels, pirates or naval warships. It has been performing check flights off the US Gulf Coast this month.

The Skydweller drone, operated by US-Spanish agency Skydweller Aero, has a wingspan of 72 metres – exceeding the width of most business passenger jets. However it weighs solely about 2500 kilograms – as a lot as a Ford F-150 truck. It’s based mostly on the Photo voltaic Impulse 2 plane, which carried out the primary solar-powered flight around the globe in 2016. Skydweller Aero bought and transformed the pioneering plane with the objective of constructing a fleet of comparable solar-powered, carbon-fibre drones able to “perpetual flight” at altitudes exceeding 13 kilometres in daytime hours.

The Skydweller drone made the world’s first uncrewed and autonomous flight of a solar-powered plane in April 2024. It additionally carried out further check flights all through that 12 months, with the longest enduring greater than 22 hours, supported by US army funding to guage its suitability for maritime drone patrols.

Most lately, the solar-powered drone made its longest flight but after taking off from Stennis Worldwide Airport in Mississippi on 20 July. It remained airborne over the Gulf Coast for greater than three days earlier than touchdown on 23 July, in response to the Flightradar24 flight monitoring service. The service exhibits the drone additionally flew earlier this month on 14 July for greater than 18 hours.

The Skydweller drone’s wingspan is sort of twice that of the most important surveillance drones, such because the Northrop Grumman RQ-4 International Hawk utilized by the US Air Pressure, and its payload of 400 kilograms far exceeds the load most solar-powered drones can carry. And lately, the French aerospace firm Thales helped equip the Skydweller drone with an airborne surveillance radar.

However the decades-long quest to commercialise solar-powered drones “has been a narrative of excessive hopes and spectacular failures”, says Arthur Holland Michel, a analysis accomplice on the Peace Analysis Institute Oslo in Norway. Each Google and Fb tried creating solar-powered drones to ship web service earlier than abandoning their efforts. The aerospace producer Airbus has additionally invested closely in its smaller Zephyr solar-electric drone, however “has but to see any important returns”, says Michel.

“Militaries have been sponsoring photo voltaic drone demo flights for over a decade, however none has acquired the expertise for a program of document,” says Michel. “Photo voltaic drones are spectacular, and so they make a number of sense in idea, nevertheless it’s not instantly clear whether or not there’s a sustainable enterprise case for them in follow.”