Oerlikon GAI-BO1

The Oerlikon GAI-BO1 is a Swiss designed and built light anti-aircraft gun which is mounted on a two-wheeled carriage with three folding outriggers. Due to its light weight and ability to be broken down into small loads it can also be mounted on ships and vehicles.

Oerlikon GAI-BO1
Oerlikon GAI-BO1 mounted on a M113
TypeAnti-aircraft gun
Autocannon
Place of originSwitzerland
Service history
Used byArgentina
Austria
Nigeria
South Africa
Spain
Switzerland
Afganistan
WarsCold War
Production history
DesignerOerlikon
Designed1950s
ManufacturerOerlikon[1]
Specifications
Mass405 kg (893 lb)
Length3.8 m (12 ft 6 in)
Barrel length2.4 m (7 ft 10 in)
Width1.5 m (4 ft 11 in)
Height2.5 m (8 ft 2 in)
Crew2[1]
ShellFixed QF 20 x 128 mm[2]
Shell weight.125 kg (4.4 oz)
Caliber20 mm (0.79 in)
ActionGas
CarriageTwo wheeled carriage with three folding outriggers
Elevation-5° to +85°
Traverse360°[1]
Rate of fire1000 rpm (cyclic)
Muzzle velocity1,100 m/s (3,600 ft/s)
Effective firing rangeAA: 2 km (6,600 ft) (effective)
AA: 4.5 km (15,000 ft) (maximum)
Maximum firing rangeGround: 1.5 km (0.93 mi) (effective)
Ground: 5.7 km (3.5 mi) (maximum)
Feed system8-round magazine
20-round magazine
50-round magazine
Sights1x aerial targets
3.5x ground targets[1]

Description

The GAI-BO1 consists of a KAB 20 × 128 mm auto-cannon mounted on a folding platform. The gun has no power assistance with elevation of the counter-balanced barrel controlled by a hand-wheel and traverse is by foot. Due to its lack of power assistance it is unable to engage fast moving aerial targets, although it is still useful for engaging light observation aircraft and helicopters. Three different sized magazines 8-round, 20-round and 50-rounds are available. There is a simple mechanical computing sight with 1x magnification for aerial targets and a 3.5x scope for engaging ground targets. In its ground role it can fire armor-piercing rounds capable of piercing 15 mm (0.59 in) of rolled homogeneous armor at 600 m (2,000 ft).[3]

gollark: In its black heart, it contains mechanisms for stuff like that which are *not* monadic.
gollark: Uuumuuutuuubuuuluuu?
gollark: Ommotobol.
gollark: `(Comonad q, Whoknows f, Applicative t, Monoid x) => q a (t x f (b)) -> t x (q a (x b)) f f`
gollark: But are they monoids in the category of endofunctors?

References
  1. Foss, Christopher (1977). Jane's pocket book of towed artillery. New York: Collier. p. 209. ISBN 0020806000. OCLC 911907988.
  2. "ANTI-TANK AND HEAVY MACHINE GUN CARTRIDGES UP TO 19 MM CALIBRE". www.quarryhs.co.uk. Retrieved 2017-09-26.
  3. Hogg, Ian (2000). Twentieth-century artillery. New York: Barnes & Noble Books. p. 98. ISBN 0760719942. OCLC 44779672.
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