Junkers F13

An all-metal monoplane passenger aircraft, Dr Hugo .Junkers’ F13 was an astonishingly advanced design for its day. Like Junkers’ World War I military aeroplanes, it had a metal cantilever wing and
a corrugated skin of duralumin, a strong lightweight aluminium alloy. The wing was based on a girder of nine tubular spars braced
together, and its centre-section formed an integral part of the fuselage, which was built up on a series of metal frames. This structure made the aircraft exceptionally strong and rugged.
The two-man crew sat in an open cockpit, but passengers were offered the unexpected comfort of an enclosed cabin not – a luxury
universally enjoyed by air travellers back in 1919. Junkers also showed an unprecedented and forward-looking concern for passengers’ safety: the F13 was the first aircraft to provide seat belts.
Sales were slow to take off at first, thanks to the large number of surplus military aircraft that were flooding the commercial market after the war, but 322 F13s had been built by the time production ceased in 1932.
Junkers’ own transport company, Junkers-Luftverkehr, operated 60 F13s and Deutsche Lufthansa had a fleet of 55, but the aircraft also sold extremely well in export markets. Indeed, throughout the 1920s F13s pioneered air transport in many parts of the world.