Engineers from Airbus' Broughton plant are working on a project aiming to cut carbon dioxide emissions from aircraft.
They are part of the BLADE project which is trying to improve the airflow over wings. It involves replacing the outer part of an Airbus A340's wings with a 'laminar flow' section.
The smoothed passage of air creates less drag than the airflow on traditional wings, potentially reducing fuel burn.
The test aircraft, dubbed Flight Lab, took off for the first time yesterday from the Tarbes aerodrome in southern France and after a series of tests landed at Airbus’ facilities in Toulouse Blagnac.