Caproni Ca. 60
The Caproni Ca.60 Transaereo also known as the Noviplano or Capronissimo. It was a prototype of a large 9-wing flying boat. It was originally intended to be a 100 passenger transatlantic airliner. It had featured 8 engines and 3 sets of ripple wings. Its first flight was in 1921, and it was destroyed on its second flight.