SAN DIEGO - America's Cup challenger BMW Oracle Racing has unveiled what is believed to be the world's largest wing, which it will test as a replacement for a traditional soft-sail rig on its giant trimaran.

Complete with flaps, the wing will tower nearly 58 metres above the deck when it's installed this week. It is longer than the wing of an Airbus 380, the world's largest passenger airliner.

The wing was unveiled five days after the trimaran's 61-metre carbon-fibre mast fell and broke in two during a sail on the Pacific Ocean.

BMW Oracle Racing will face defending champion Alinghi of Switzerland in a best-of-three showdown beginning February 8 for the oldest trophy in international sports.

- AP