The Curtiss JN-4 Canuck was the Canadian-built version of the famous Curtiss Jenny trainer, produced during World War I. Unlike the U.S. version, the Canuck featured several modifications, including different control arrangements and structural changes suited to the Royal Flying Corps Canada training program. Built in large numbers beginning in 1917, the JN-4 Canuck became a cornerstone of pilot instruction under the British Commonwealth Air Training effort’s predecessor programs, helping train hundreds of aviators in Canada’s vast open spaces. After the war, many surplus Canucks entered civilian service, where they became popular barnstorming and mail aircraft, helping usher in the early age of North American civil aviation.