Vickers F.B.5

infobox Aircraft
name = Vickers F.B 5 "Gun Bus"
type = fighter
manufacturer = Vickers Limited

---

caption = Gunbus of the RFC
designer =
first flight = 17 July 1914
introduced = 5 February 1915
retired = 1916
status =
primary user = Royal Flying Corps
more users = "Aéronautique Militaire"
produced =
number built = 224
unit cost =
variants with their own articles =

The Vickers F.B.5 (Fighting Biplane 5) (known as the "Gunbus") was a British two-seat pusher military biplane of the First World War. Armed with a single Lewis gun operated by the observer in the front of the nacelle, it was the first aircraft purpose-built for air-to-air combat to see service, making it the world's first operational fighter aircraft.

Design and development

Vickers began experimenting with the concept of an armed warplane designed to destroy other aircraft in 1912. The first resulting aircraft was the Type 18 "Destroyer" (Vickers E.F.B.1) which had been demonstrated in 1913. This aircraft was of the "Farman" pusher layout, to avoid the problem of firing through a tractor propeller, and was armed with a single belt-fed Maxim machine gun. The belt feed proved problematic for a flexible machine gun, and the weapon installed was changed to the lighter, handier, drum-fed Lewis gun. The E.F.B.1 was the first in a line of Vickers' "Experimental Fighting Biplanes", of which the F.B.5 was the most famous - and the first to be built in quantity.

The F.B.5 first flew 17 July 1914. It was powered by a single 100-hp Gnome Monosoupape 9-cylinder rotary engine driving a two-bladed propeller, and was of simple, clean, and conventional design compared with its predecessors. In total 224 F.B.5s were produced, 119 in Britain by Vickers, 99 in France and 6 in Denmark.

F.B.6

The Vickers F.B.6 was a development of the F.B.5 with an increased span on the upper wing. It was not put into production.

F.B.9

A further development of the F.B.5 the Vickers F.B.9 had a more streamlined nacelle and an improved ring mounting (either Vickers or Scarrf) for the Lewis gun. 50 were delivered to Royal Flying Corps training units.

Operational history

The first F.B.5 was delivered to No. 6 Squadron of the Royal Flying Corps (RFC) at Netheravon in November 1914. Andrews and Morgan, p.49.] On 25 December 1914, the first use of the F.B.5 in action took place, when a F.B.5 took off from Joyce Green airfield to engage a German Taube monoplane, hitting the Taube (and possibly causing its loss) with incendiary bullets from a carbine after the Lewis gun jammed. Bruce 1980, p.61]

The F.B.5 began to be seen on the Western Front when the first examples reached No.2 Squadron RFC on 5 February 1915. Bruce 1980 p.62.] The type served in ones and twos with several other units before No. 11 Squadron RFC became the world's first fighter squadron when, fully equipped with the F.B.5, it deployed to Villers-Bretonneux, France on 25 July 1915. Bruce 1980, p.63.] Second Lieutenant G.S.M. Insall of 11 Squadron won the Victoria Cross for an action on 7 November 1915 in which he destroyed a German aircraft while flying a Gunbus. Andrews and Morgan, p.51.] No. 18 Squadron RFC, which deployed to France in November 1915, also operated the F.B.5 exclusively.

The F.B.5's performance proved to be inadequate for its intended role; although its forward firing machine gun was a great advantage, the fighter did not have the speed or rate of climb to pursue its quarry. By the end of 1915 it was outclassed by the Fokker Eindecker. Some examples of the improved Vickers F.B.9 were sent to France, pending sufficient supplies of the Royal Aircraft Factory F.E.2b, but the active career of the "Gunbus" was soon over. The remaining examples were mostly used as trainers.

Legacy

The Vickers company persisted with an active experimental program during the First World War period, including a line of single seat pusher fighters, but the F.B.5 remained their only significant production aircraft until the Vickers Vimy bomber, which entered service too late to have an impact.

Despite its moderate effectiveness, the Vickers F.B.5 did have a lasting legacy as German pilots continued to refer to British pusher aircraft as "Vickers-types". Many victories over D.H.2 or F.E.2b pushers were reported as destruction of a "Vickers".

Operators

; FRA
* "Aeronautique Militaire" ; DEN; UK
* Royal Flying Corps
**No. 2 Squadron RFC
**No. 5 Squadron RFC
**No. 7 Squadron RFC
**No. 11 Squadron RFC
**No. 16 Squadron RFC
**No. 18 Squadron RFC
**No. 24 Squadron RFC
**No. 25 Squadron RFC
**No. 32 Squadron RFC
**No. 35 Squadron RFC
**No. 41 Squadron RFC

pecifications (Vickers F.B.5)

aircraft specifications

plane or copter?=plane
jet or prop?=prop
ref=Vickers Aircraft since 1908 Andrews and Morgan 1988, p.59.]

crew=Two, pilot & observer/gunner
length main=27 ft 2 in
length alt=8.28 m
span main=36 ft 6 in
span alt=11.13 m
height main=11 ft 0 in
height alt=3.35 m
area main=382 ft²
area alt=35.5 m²
empty weight main=1,220 lb
empty weight alt=555 kg
loaded weight main=2,050 lb
loaded weight alt=930 kg
max takeoff weight main=
max takeoff weight alt=
engine (prop)=Gnome Monosoupape
type of prop=9-cylinder rotary engine
number of props=1
power main=100 hp
power alt=75 kW

max speed main=70 mph
max speed alt=61 knots, 113 km/h
max speed more= at 5,000 ft (1,520 m)
range main=250 mi
range alt=217 NM, 403 km
ceiling main=9,000 ft
ceiling alt=2,743 m
climb rate main=
climb rate alt=
loading main=5.4 lb/ft²
loading alt=26 kg/m²
power/mass main=0.05 hp/lb
power/mass alt=0.08 kW/kg
more performance=
*Endurance 4 hours 30 minutes Bruce 1980, p.69.]
*Climb to 5,000 ft (1,520 m): 16 min
armament=
* 1x 0.303 in (7.7 mm) drum-fed Lewis gun in observer's cockpit

ee also

aircontent
related=
*Vickers E.F.B.1
*Vickers F.B.9

similar aircraft=
*Royal Aircraft Factory F.E.2

sequence=

lists=
*List of aircraft of the Royal Flying Corps

see also=

References

Notes

Bibliography

* Andrews, C.F. and Morgan, E.B. "Vickers Aircraft since 1908". London:Putnam, 1988. ISBN 0 85177 815 1.
* Bruce, J.M. "Vickers' First Fighters". "Air Enthusiast" No 12, April - July 1980. Pages pp.54-70. ISSN 0143-5450.

External links

* [http://www.britishaircraft.co.uk/aircraftpage.php?ID=605 British Aircraft Directory: Vickers F.B.5]