avia.wikisort.org - Weapon

The BK 27 (also BK27 or BK-27) (German abbreviation for Bordkanone, "on-board cannon") is a 27 mm (1.063 in) caliber revolver cannon manufactured by Mauser (now part of Rheinmetall) of Germany. It was developed in the late 1960s for the MRCA (Multi Role Combat Aircraft) program that ultimately became the Panavia Tornado.[2]

Mauser BK-27
The Mauser BK-27
Type	Revolver cannon
Place of origin	Germany
Service history
Used by	See users
Production history
Designer	Mauser (now Rheinmetall)
Designed	1976
Manufacturer	Mauser (now Rheinmetall)
Produced	1977–present
No. built	3,100~
Specifications
Mass	100 kg (220 lb 7 oz)
Length	2.31 m (7 ft 7 in)
Barrel length	1.73 m (5 ft 8 in)
Shell	27×145 mm
Caliber	27 mm (1.063 in) caliber
Barrels	Single barrel
Action	five-chamber revolver
Rate of fire	1,000–1,700 rpm (+/− 100 rpm), selectable
Muzzle velocity	1,100 m/s (3,600 ft/s)[1]
Maximum firing range	Air targets: 2,500 meters Surface targets: 4,000 meters High speed naval targets: 2,500 meters

The BK 27 is a gas-operated cannon firing a series of 27×145 mm cartridges with a typical projectile weight of 260 g (9.2 oz), and a total weight for the complete round of 516 g (1.14 lb).[1] Most models use a linked feed system for the ammunition; however, the Eurofighter Typhoon makes use of a specially developed variant of the BK 27 that uses a linkless feed system instead, which is intended to improve reliability.[2]

Design

The Mauser BK 27 is used in the Panavia Tornado, the Alpha Jet, the JAS 39 Gripen, and the Eurofighter Typhoon. At one time Lockheed Martin was considering a licensed-built version for the F-35 Lightning II.[3]

Rheinmetall has also developed remote controlled naval versions, the MN 27 GS and the MLG 27 fully automatic naval guns, which are installed on many ships of the German Navy. Ninety-nine MLG 27s have been ordered by the German Navy so far.[4] The cannon is a single-barrel, high performance, breech-cylinder gun operated by a fully automatic electrically fired gas-operated system at a selective rate of 1000 or 1700 rounds per minute(+/− 100 rpm).[2] The Mauser BK 27 utilizes pyrotechnic cocking charges to cycle the action.

The gun mainly fires mine shells as these have the best effect against aircraft, there are also several types of armor piercing shells like the frangible armour piercing shell named Fap 27 mm x 145 mm ammunition/peb327 (DM103).^{[citation needed]}

Operators

Current operators

 Algeria

• Algerian Navy[5]

 Austria

• Austrian Air Force: Eurofighter

 Brazil

• Brazilian Air Force: Gripen[6]

 Brunei

• Royal Brunei Navy

 Cameroon

• Cameroon Air Force: Alpha Jet

 Canada

• Discovery Air Defence Services: Alpha Jet

 Czech Republic

• Czech Air Force: Gripen

 Germany

• German Air Force: Panavia Tornado, Eurofighter
• German Navy: MLG 27

 Hungary

• Hungarian Air Force: Gripen

 Italy

• Italian Air Force: Panavia Tornado, Eurofighter

 Saudi Arabia

• Royal Saudi Air Force: Panavia Tornado, Eurofighter

 South Africa

• South African Air Force: Gripen

 Spain

• Spanish Air Force: Eurofighter

 Sweden

• Swedish Air Force (under the designation 27 mm automatkanon m/85, 27 mm akan m/85): Gripen

 Thailand

• Royal Thai Air Force: Alpha Jet, Gripen

 United Arab Emirates

• United Arab Emirates Navy

 United Kingdom

• Royal Air Force: Eurofighter

Former operators

 Portugal

• Portuguese Air Force: Alpha Jet

 United Kingdom

• Royal Air Force: Panavia Tornado
• QinetiQ: Alpha Jet

Specifications

Data from Jane's Information Group[2]

• Type: single-barrel, five chamber revolver cannon
• Caliber: 27 mm × 145 (1.063 in)
• Operation: revolver
• Length: 2.31 m (7 ft 7 in)
• Weight (complete): 100 kg (220 lb)
• Rate of fire: 1,000-1,700 rpm selectable (+/− 100 rpm)
• Muzzle velocity: 1,100 m/s (3,600 ft/s)
• Muzzle energy: ~157,300 Joules
• Projectile weight: 260 g (9.2 oz)

See also

• ADEN cannon – comparable British design
• DEFA cannon – comparable French design
• R-23 cannon – comparable Russian design
• M39 cannon – comparable US design
• Oerlikon KBA - comparable Swiss design

References

Notes

External links

• Website of Rheinmetall Defence
• Marineleichtgeschütz MLG 27 (Website from constructor)
• Mauser BK 27 on WaffenHQ
• Webseite of the EF2000
• RAF page on BK 27

На других языках

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- [en] Mauser BK-27

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[it] Mauser BK-27

Il cannone automatico BK-27 (in tedesco acronimo di "Bordkanone" o cannone imbarcato) è un sistema CIWS antiaereo-antimissile di produzione tedesca realizzato dalla Mauser, industria del gruppo Rheinmetall.

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