|Primary users|| U.K. (RNAS)|
|Developed from||Felixstowe F.3|
|Wingspan||31.6 m (103 ft 8 in)|
|Engine||2×325-350hp Rolls-Royce Eagle or|
2×400hp Liberty 12
|Armament||flexible nose Lewis|
flexible rear Lewis
1 Lewis each waist
|Max Speed||142 km/h (88 mph) |
|Climb||610 m (2,000 ft) in 4:00-6:30|
2,000 m (6,500 ft) in 16:30-30:00
3,000 m (10,000 ft) in 38:00
|Service Ceiling||2,100 m (6,800 ft)-3,000 m (10,000 ft)|
The Felixstowe F.5 was a refinement if the F.3 with a strengthened hull and balanced control surfaces. It arrived too late to see operational service in World War One.
In a strange twist, the F.5 was taken up and produced after the war in America, so the line of flying boats that started with the Curtiss H-12 "Large America" had passed from the F.2, F.3, and finally returned to the USA in the F.5. The American version used twin 400hp Liberty engines and was designed the F-5L. Fifteen F.5s were purchased by Japan in 1921. 
Large numbers of F.5Ls were ordered by the U.S. Navy: fifty from Canadian Aeroplanes; 480 from the National Aircraft Factory; and Sixty from Curtiss, but most were cancelled as the war concluded. The F.5 remained in service with the British through 1925 and even longer with the Americans. 
For more information, see Wikipedia:Felixstowe F.5.
- Bruce'69, p.253.
- Nowarra, pp.200-201.
- Nowarra, p.105.