The aircraft which can fly for a year without landing

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Warton is best known for some of the fastest jet planes on the planet – but one revolutionary aircraft being readied for flight there in the coming months is one of the slowest.

Despite its low speed and gawky looks, the Phasa-35 being built by Prismatic of Bristol and BAE Systems together, has the ability to be a game changer when it comes to international disaster response operations, long term border surveillance and fishery protection.

The Phasa-35  high altitude pilotless aircraft being readied for flight trials in 2020 by staff from Prismatic of Bristol and BAE Systems of Warton

The Phasa-35 high altitude pilotless aircraft being readied for flight trials in 2020 by staff from Prismatic of Bristol and BAE Systems of Warton

It is a solar powered, propeller driven, pilotless aircraft which flies at high altitude for months on end with its 35m wingspan, acting as an eye in the sky and a much cheaper and more manoeuvrable asset than a satellite.

With high definition cameras and the ability to carry other digital equipment, it can even act as an overhead mobile phone link, providing 5G cover over remote areas or in a disaster relief emergency such as famine, bush fires or floods.

It stays in position 60,000 ft up, higher than the clouds and jet stream, thus avoiding high winds and bad weather and enjoying the full glare of the sun to power its batteries.

Since the initial collaboration between the two companies was announced in May 2018, engineers have been developing two of the solar-powered unmanned prototypes, with various sensor payloads and operational concepts.

Staff looking at the ultra light carbon fibre airframe

Staff looking at the ultra light carbon fibre airframe

They are now undergoing integration testing at BAE Systems’ Warton facility in Lancashire in preparation for flight trials planned for early next year.

David Tyler, head of project for Prismatic at Warton said: “It sits above the jet stream and has a low forward speed. In fact, Usain Bolt can run faster than this aircraft flies, but up there it can circumnavigate the world in around eight days.

Drew Steel, BAE Systems’ operational requirements executive, said: “It can stay airborne for over a year. It has real persistence, so for something where you need to have monitoring every day, like monitoring an oil pipeline for leaks or observing the rainforest for fires for example, it will be perfect.

“It can only carry a 15kg payload but as you see with mobile phones everything technology-wise is getting smaller. It won’t take the place of something else such as a satellite, but it will be part of a layered surveillance system.”

The Phasa-35 will fly above the jetstream to avoid turbulence and gather solar power from the sun

The Phasa-35 will fly above the jetstream to avoid turbulence and gather solar power from the sun

The Phasa-35 (standing for Persistent High Altitude Solar Aircraft) is made from ultra-thin carbon fibre composite material and weighs just 150kg, including its 15kg payload.