America's Cup World Series

In 2015, the class was modified to AC45F which incorporated hydrofoiling capability for improved performance, with boats achieving peak speeds of 37kt.

Oracle Racing released photographs of an AC45 hydrofoiling with L-type appendages on June 18, 2012, a premonition of Team New Zealand's larger foiling AC72 Aotearoa test boat first spotted in Auckland on August 29, 2012.

[2] In February 2015 Oracle Racing and Artemis Racing tested two AC45s modified by Core Builders; They featured L-type hydrofoils, horizontal rudder stabilizers, lengthened crossbeams (herego wide beam), a shortened jib-only bowsprit extending into a centerline pod under the wing, flaring topsides, closed transoms, opened hulls with deep cockpits for binnacles and wheels, replacing the tiller.

In August 2013, the competition jury received a report from Oracle Team USA that their boat and others they had loaned had unauthorized modifications.

[6] The series was revived as heats of nine two-day events in eight venues in the run up to the 2017 America's Cup.