The Wright brothers’ first powered airplane to fly in 1904 was called Flyer II.
Flyer II was an improved version of the 1903 Wright Flyer. The brothers operated it at Huffman Prairie near Dayton, Ohio, where they could conduct repeated experiments away from the crowded conditions of their first publicized flights.
The aircraft incorporated structural and aerodynamic changes, including modifications intended to make it more durable and practical for repeated testing. The brothers learned to launch and turn more reliably during the 1904 season.
Flyer II is sometimes confused with Flyer III, the substantially improved 1905 aircraft that achieved sustained, controlled flights and remained airborne for much longer periods. Flyer I belongs to the breakthrough year of 1903; Flyer II belongs to the experimental 1904 season.