Friedrichshafen FF.31

infobox Aircraft
name = FF.31
type = Two-seat coastal patrol floatplane
manufacturer = Flugzeugbau Friedrichshafen


caption =
designer =
first flight = 1910s
introduced = 1915
retired =
status =
primary user = German Navy
more users =
produced =
number built =
unit cost =
developed from =
variants with their own articles = The Friedrichshafen FF.31 was a German lightweight two-seat floatplane of the 1910s produced by Flugzeugbau Friedrichshafen.

Development and design

The FF.31 was a biplane floatplane with a central nacelle and two open cockpits. The engine was mounted at the rear of the nacelle, driving with a pusher propeller. The twin open-frame tail booms extended aft from the wings to carry the tail unit. A version of the FF.31 with a fixed tailskid landing gear was designated the FF.37.

Operational history

The FF.31 entered service with the German Navy in May 1915.

Variants

;FF.31:Production floatplane;FF.37:FF.31 with fixed tailskid landing gear.

Operators

;flag|German Empire
*German Navy

pecifications (variant)

aerospecs
met or eng?= met

crew=Two, pilot and observer
capacity=
length m=10.15
length ft=33
length in=4
span m=16.85
span ft=55
span in=3
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=
height ft=
height in=
wing area sqm=60.0
wing area sqft=646
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=1,063
empty weight lb=2,344
gross weight kg=1,400
gross weight lb=3,086
lift kg=
lift lb=

eng1 number=1
eng1 type=Maybach IR
eng1 kw= 120
eng1 hp= 160
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=98
max speed mph=61
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=500
range miles=312
endurance h=
endurance min=
ceiling m=
ceiling ft=
glide ratio=
climb rate ms=0.9
climb rate ftmin=177
sink rate ms=
sink rate ftmin=

armament1=1 × 7.9 mm Parabellum MG14 machine gun for observer
armament2=
armament3=
armament4=
armament5=
armament6=

References

*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=
*

External links

ee also

aircontent

related=

similar aircraft=

sequence=
* ← FF.21 - FF.29 - FF.30 - FF.31 - FF.33 - FF.34 - FF.35 →

lists=
* List of military aircraft of Germany
* List of seaplanes and flying boats

see also=