Royal Aircraft Factory F.E.9
1917
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Royal Aircraft Factory F.E.9

Conceived as a replacement for the F.E.2b in the fighter-reconnaissance role, the F.E.9 was of similar pusher configuration and therefore already obsolescent by the time it appeared in 1917. Emphasis was placed in the design upon providing the gunner with a good field of fire and the pilot a good all-round view. To this end, the nacelle was located close beneath the upper wing and was carried on struts above the shorter-span lower wing. The large overhang of the upper wing brought the F.E.9 almost into the sesquiplane category, and called for bracing wires from triangular kingposts above the interplane struts of the single-bay cellule. A cruciform tail unit was carried on four slender booms, as on the F.E.2, and the Vee-strutted undercarriage incorporated oleo legs. Construction was largely of wood, but pairs of steel tube N-struts linked the nacelle to the upper and lower wings. Power was provided by a 200hp Hispano-Suiza eight-cylinder V-type water-cooled engine and the planned armament comprised two 7.7mm Lewis guns on pillar mounts, ahead of and behind the front cockpit, and both fired by the observer - the latter rearwards over the pilot's head and the top wing. Installation of a third gun, on the side of the fuselage for use by the pilot, was planned. Authority was given by the War Office for construction of three prototypes and a production batch of 24 in October 1916, and testing began in April 1917. Handling and performance of the prototypes were disappointing, however, and production was cancelled, to allow the Hispano engines to be used in more worthwhile types. Testing of the prototypes continued, in the course of which two-bay wings were tried on the second aircraft, which was also flown for a time by No 78 Home Defence Squadron, RFC.

3-View 
Royal Aircraft Factory F.E.9A three-view drawing (1280 x 828)


Specification 
 WEIGHTS
    Take-off weight1125 kg2480 lb
 DIMENSIONS
    Wingspan12.22 m40 ft 1 in
    Length8.61 m28 ft 3 in
    Height2.97 m10 ft 9 in
    Wing area33.91 m2365.00 sq ft
 PERFORMANCE
    Max. speed169 km/h105 mph
    Ceiling4725 m15500 ft

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