Curtiss JN "Jenny" Airplane, circa 1915

The Curtiss JN-4, first produced in 1915, was among the best-known aircraft of its day. It was the U.S. Army's primary training airplane during World War I, and military crews affectionately nicknamed it "Jenny." After the war, barnstorming pilots bought surplus Jennys and flew them in stunt shows, introducing many Americans to aviation's wonders and possibilities.