J.Davilla Italian Aviation in the First World War. Vol.3: Aircraft M-W (A Centennial Perspective on Great War Airplanes 75)

Pateras-Guidoni

  A twin-engine monoplane seaplane, the first torpedo flying boat built in the world, was designed in 1912 by the lawyer Pescara-Pateras. He showed his designs to the Regia Marina, which accepted it and instructed the capitano del Genio Navale (captain of the Naval Engineers) ing. Alessandro Guidoni for its construction.
  The Pateras-Guidoni torpedo seaplane was a monoplane, the largest that had yet been built, with wings made of wood and aluminum attached to the fuselage. At the base of the wing there was an opening of about one meter for the two propellers which faced each other. The fuselage was divided such that the forward propeller was fitted as a pusher and the forward one as a tractor. The engines were 18-cylinder Gnome rotary engines each generating 200 hp. The connection between the two parts of the fuselage was entrusted to two long floats by means of a lower frame; an upper pylon held the steel cables that supported the wings. The fuselage was completely metal. The rudders were balanced to reduce the effort required to maneuver the aircraft; a small compressed air servomotor was considered instead, but was not used. The floats were of the Guidoni type with hydroplane fins, had an elliptical section with two straight ends and were made of wood with steel fins. There were rudders at the stern of each float for maneuvering in the water.
  Construction began at the Venice arsenal, but it was only at the beginning of 1914, due to the delay in the delivery of the engines from Gnome, that test flights began. On 26 February Guidoni launched a simulated torpedo weighing 375 kg. Although the test proved the success of the project, the aircraft was abandoned after only a few more flights.


Pateras-Guidoni Torpedo Seaplane with Twin Gnome Rotary Engines of 100-hp
  Wingspan 19 m; length 15 m; length of floats 9 m; height 5 m; wing area 70 sq m
  Empty weight 1,600 kg; loaded weight 2,800 kg; payload 1,200 kg.
  Maximum speed 120km/h; endurance 3 hours