Airbus is preparing to relaunch flight-testing of winglets on the A320, following an agreement with US specialist Aviation Partners (API) to carry out trials.

After an abortive evaluation two years ago of an in-house design and one developed by Winglet Technology of the USA, Airbus revealed in May that it intended to re-examine the concept in conjunction with Boeing’s long-established supplier API. These tests were originally due to start in July, but will now get under way imminently, says the airframer.