Endeavour is a 130-foot (40 m) J-class yacht built for the 1934 America's Cup by Camper and Nicholson in Gosport, England. She was built for Thomas Sopwith who used his aviation design expertise to ensure the yacht was the most advanced of its day with a steel hull and mast. She was launched in 1934 and won many races in her first season including against the J's Velsheda and Shamrock V. She failed in her America's Cup challenge against the American defender Rainbow but came closer to lifting the cup than any other until Australia II succeeded in 1983.