Farman F.31

The Farman F.31 was a French fighter prototype of the 1910s, the second foray into fighter design by Farman, a firm more usually associated with bombers. The project was short-lived, lasting only 3 months.

Development

The F.31 was a two-seat fighter, designed around the Liberty 12 engine. It was exceptionally angular, and equi-span with the fuselage mounted between its two bays.

Operational history

The sole prototype was completed and first flown in summer 1918. Testing was still ongoing in November 1918, when the Armistice put an end to the project and no further development continued.

pecifications

aerospecs
ref=Green & Swanborough, page 202
met or eng?=met

crew=2
capacity=
length m=7.35
length ft=24
length in=1
span m=11.76
span ft=38
span in=6
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=2.58
height ft=8
height in=9
wing area sqm=
wing area sqft=
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
wing profile=
empty weight kg=869
empty weight lb=1916
gross weight kg=1469
gross weight lb=3239
lift kg=
lift lb=

eng1 number=1
eng1 type=Liberty 12 12-cylinder water-cooled engine
eng1 kw=298
eng1 hp=400
eng1 kn=
eng1 lbf=
eng1 kn-ab=
eng1 lbf-ab=
eng2 number=
eng2 type=
eng2 kw=
eng2 hp=
eng2 kn=
eng2 lbf=
eng2 kn-ab=
eng2 lbf-ab=

max speed kmh=215
max speed mph=134
max speed mach=
cruise speed kmh=
cruise speed mph=
stall speed kmh=
stall speed mph=
range km=
range miles=
endurance h=
endurance min=
ceiling m=
ceiling ft=
g limits=
roll rate=
glide ratio=
climb rate ms=
climb rate ftmin=
sink rate ms=
sink rate ftmin=

armament1=2 x fixed forward-firing .303 Vickers gun
armament2=1 x rear-mounted swivelling .303 Lewis gun
armament3=
armament4=
armament5=
armament6=

References

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