Airbus has started fitting the sweeping winglets to the first flying prototype of its A350 twinjet, ahead of its maiden flight later this year.
The winglets will give this variant of the A350 a total span of 64.8m (212ft).
Airbus's latest aircraft specification document for the A350-900, released in December 2012, indicates that the winglet sweeps 5.2m from its leading-edge attachment to its rear tip.
Airbus is aiming to fly MSN1 in mid-2013. Both of the aircraft's Rolls-Royce Trent XWB engines have been delivered to the assembly line in Toulouse for podding and installation.