Caproni Ca.60 experimental flying boat under construction in Sesto Calende, 1921. The Caproni Ca.60, or Transaereo, was a nine-wing flying boat intended to be a prototype for a 100 passenger trans-atlantic airliner. It featured eight engines and three sets of triple wings. In this photo, designer Gianni Caproni is seating on the left outrigger.