Home > Space & Aero > PHASA-35 Completes First Successful Stratospheric Flight

PHASA-35 Completes First Successful Stratospheric Flight

PHASA-35 [BAE Systems press release image]

British engineers have successfully completed a stratospheric flight trial of BAE Systems’ PHASA-35 HAPS Uncrewed Aerial System.

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Press Release, London, 14 July 2023: British engineers have successfully completed a stratospheric flight trial of BAE Systems’ High Altitude Pseudo Satellite (HAPS) Uncrewed Aerial System (UAS) – PHASA-35.

Over a 24-hour period, PHASA-35 soared to more than 66,000 feet, reaching the stratosphere, before landing successfully. The trial, completed last month in New Mexico in the USA, allowed engineers to assess the performance of the experimental solar-electric drone within the outer-reaches of the planet’s atmosphere.

The flight marks a significant milestone in PHASA-35’s development which began in 2018. Designed by BAE Systems’ subsidiary Prismatic Ltd to operate above the weather and conventional air traffic, it has the potential to provide a persistent and stable platform for various uses including ultra-long endurance intelligence, surveillance and reconnaissance, as well as security. It also has the potential to be used in the delivery of communications networks including 4G and 5G and could be used in a wide range of applications, such as disaster relief and border protection, as an alternative to traditional airborne and satellite systems.

PHASA-35 [BAE Systems press release image]

The PHASA-35 programme sits within FalconWorks, a new centre for advanced and agile research and development within BAE Systems’ Air sector, designed to deliver a range of cutting-edge combat air capabilities to the UK and its allies.

PHASA-35, which has a 35-metre wingspan and carries a 15kg payload, uses a range of world-leading technologies including advanced composites, energy management, solar electric cells and photo-voltaic arrays to provide energy during the day which is stored in rechargeable cells to maintain flight overnight.

The successful trial assessed the performance of the experimental system across a range of areas. It is the first in a series of trials planned to confirm system performance, support development activities and validate test points to enable PHASA-35 to be made available in defence and commercial markets internationally.

“This is a fantastic achievement for everyone involved and shows the commitment of BAE Systems to invest in new technologies and markets. PHASA-35’s first stratospheric flight demonstrates that this vehicle is on track to become the go-to system for long endurance, high altitude and communications applications in the future. The successful trials are a testament to the hard work of the fantastic team that we have built over the last couple of years within Prismatic and across our partner companies including Piran, Amprius, Microlink, Honeywell, PMW Dynamics and the Met Office. I look forward to the next steps as we develop this unique system.” Dave Corfield, CEO of Prismatic Ltd

“PHASA-35 is breaking new ground – opening up the stratosphere to new possibilities. The team, which brings together BAE Systems’ know-how from across the globe with innovative solar and power management technologies, demonstrated tremendous commitment and ambition as they tackled the challenges associated with novel technologies and approaches. This partnership approach is key to our ability to enhance our defence expertise with new thinking and technologies.” Cliff Robson, Group Managing Director for BAE Systems’ Air Sector

The latest trials took place from Spaceport America in New Mexico, flying in the White Sands Missile Range, and are sponsored by the US Army Space and Missile Defense Command Technical Center. This test flight at White Sands Missile Range was coordinated and directly supported by personnel attached to Naval Surface Warfare Center, Port Hueneme Division, Detachment White Sands.

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