The Felixstowe F.4 Fury[2] (serial N123), also known as the Porte Super-Baby, was a large British, five-engined triplane flying-boat designed by John Cyril Porte at the Seaplane Experimental Station, Felixstowe, inspired by the Wanamaker Triplane/Curtiss Model T. At the time the Fury was the largest seaplane in the world, the largest British aircraft,[3][2] and the first aircraft controlled successfully by servo-assisted means.

[4] Started in early 1917, the Porte Super-baby was a huge aircraft by the standards of the time, with a wingspan comparable to the monoplane flying-boat designs of the 1930s.

The hull, claimed to have been the best of all Porte's designs, was planked diagonally with cedar wood forming a very wide, slightly concave v-bottom with large fuselage chines.

[2] Conceived for military purposes and armed with Lewis guns[8] the Fury did not see active duties,[6] its first flight on Armistice Day meant focus was paid to the aircraft's civilian capabilities.

These were mounted on the middle wing and supported by additional struts, configured as two outboard tandem tractor/pusher (push-pull) pairs and one central pusher.

With the intense competition in early 1919 to achieve the first transatlantic flight, it was planned to join other teams in the race by shipping the Fury to Cape Broyle, Newfoundland.

[1] The Air Ministry's preference to leave the non-stop achievement to a commercial venture, led to the abandonment of the attempt[3] about the third week of May 1919, when flight tests resumed.

[3] Final preparations were being made on 11 August at Felixstowe when the aircraft side-slipped at low altitude and crashed at 90 mph shortly after take-off, breaking up on impact.

[3][4] The crash was a surprise as the Fury was subject to exhaustive tests in the 12 weeks prior to the flight, surpassing the crews expectations who had every confidence in the aircraft.