Otobreda 76 mm

Otobreda 76 mm
Otobreda 76 mm
76/62 Super Rapid
The Otobreda 76mm Super Rapid as mounted in a stealth cupola (to reduce Radar cross-section) onboard the Norwegian Fridtjof Nansen.
Type Naval gun
Place of origin  Italy
Service history
In service 1964 - present
Used by See users
Production history
Designer Oto Melara
Designed Compact: 1963
Super Rapid: 1985
Manufacturer Oto Melara (1963–2001)
OtoBreda (2001 onwards)
Produced Compact: 1964
Super Rapid: 1988
Variants See variants
Specifications
Weight Empty: 7.5 tonnes (17,000 lb)
Barrel length 62 caliber: 4,724.4 mm (186.00 in)

Shell 76×900mmR (complete round)
12.34 kilograms (27.2 lb)
Caliber 76.2 mm (3.00 in)
Elevation -15°/+85°
speed:35°/s (acceleration: 72°/s²)
Traverse 360°
speed: 60°/s (acceleration: 72°/s²)
Rate of fire Compact: 85 round/min
Super Rapid: 120 round/min
Muzzle velocity 925 m/s (3,030 ft/s)
Maximum range HE round fired at 45°:
Compact: 20,000 m (22,000 yd)
Super Rapid: 30,000 m (33,000 yd)
Feed system Magazine capacity:
80 ready rounds on Compact gun mount
85 ready rounds on Super Rapid gun mount

The Otobreda 76 mm gun is a naval artillery piece built by the Italian defence conglomerate Otobreda. It is based on the Oto Melara 76mm/L62 Allargato, which was bigger and heavier. A vehicle-mounted version known as the Otomatic was built for the self-propelled anti-aircraft gun role but was not put into production.

The unlike the older Allargato the Otobreda 76mm Compacto cannon system is compact enough to be installed on relatively small warships, like corvettes, avisos (a vessel somewhere between a corvette and a patrol boat), or patrol boats. The gun's high rate of fire makes it suitable for short-range anti-missile point defence, and its calibre also allows it to function in anti-aircraft, anti-surface, and ground support roles. Specialised ammunition is available for armour piercing, incendiary, and directed fragmentation, and a new stealth cupola has been designed in recent years.

The Otobreda 76mm has been widely exported and is in use with 53 navies. It has recently been favoured over the French 100 mm naval gun for the joint French/Italian Horizon CNGF frigate project. On 27 September 2006 Iran announced it has started mass production of a marine artillery gun, named the Fajr-27, which is a reverse-engineered Oto Melara 76 mm gun.[1]

Contents

Other specifications

  • Cooling: sea water—fresh water for flushing
  • Electrical Power supply
    • 440 V, 3-phase, 60 Hz, main circuit;
    • 115 V, 1-phase, 400 Hz, servo and synchro network

Variants

  • 76/62 Super Rapid - Also called the "Super Rapido" this is the most up to date development of the Italian 76mm naval cannons, with an increased rate of fire of 120 rounds per minute and increased range of 30 km. To achieve the higher rate of fire the Super Rapido requires a specially developed round that can be uploaded and chambered at higher speeds. While the older 76mm Allargato and 76mm Compacto can fire the new special round, it does not increase their rate of fire. Only the Super Rapido can fire at 120 rounds per minute. And that rate is only done in short bursts. The Super Rapido also improved on the serious vibration problems that the older Oto Malera and Otobreda 76mm mounts had that effected accuracy against smaller high speed air targets, for example anti-shipping missiles and guided bombs.

Users

Platforms using the Oto-Melara 76 mm include:

Asia

 Bangladesh
  • Ulsan class frigate
 Indonesia
 India
 Iran
  • Kaman class missile boat
 Israel
  • Saar 3 class missile boat
  • Saar 4 class missile boat
  • Saar 4.5 class missile boat
The OTO-Melara 76mm mounting is seen in this photograph of the Japanese Asagiri class destroyer Asagiri, formerly DD 156, renumbered TV 3516, seen here on 28 July 2008 departing from Portsmouth Naval Base, UK
Shells of the Otobreda 76 mm gun in Japanese service.
 Japan
 South Korea
 Myanmar
  • Aung Zay Ya class frigate
  • Anawyatha class corvette
 Malaysia
 Philippines
The OTO Melara 76mm Super Rapid gun mounted on the Victory class corvette - RSS Valour (89)
 Singapore 
Republic of Singapore Navy
 Sri Lanka
  • Nandimithra Class Saar 4 class fast missile vessel
 Thailand
  • Pattani class offshore patrol vessel
  • Ratanakosin class corvette
  • Ratcharit missile boat
  • Chuburi patrol boats
  • Tapi class large patrol corvette
  • Khamronsin class corvette
 Republic of China (Taiwan)
 United Arab Emirates
  • Baynunah class corvette

Africa

 Egypt
 Morocco
 South Africa
 Tunisia

Europe

 Belgium
 Denmark
 France
OTO-Melara 76 mm gun onboard the Sachsen class frigate - F221 Hessen
 Germany
 Greece
76 mm OTO Melara cannon on the Irish Naval Service patrol vessel LÉ Niamh
 Ireland
Twin 76 mm guns of the Italo-Franco Horizon class frigate, Andrea Doria
 Italy
 Netherlands
 Norway
 Poland
 Portugal
 Romania
  • Regele Ferdinand frigate
  • Regina Maria frigate
 Spain
 Turkey

North America

 Canada
The Mk 75 in use aboard USCGC Gallatin, 2005.
Loading of the 76 mm shells
Underdeck of a Mark 75 gun
Various aspect of the Otobreda 76 mm Mark 75 gun in US service
 United States
 Mexico
  • Oaxaca class Offshore Patrol Vessel(Mexican Navy)

Oceania

 Australia

South America

 Argentina
 Chile
 Colombia
 Ecuador
  • Quito class missile boat (Ecuador)
 Peru

See also

  • 76mm/L62 Allargato

References

Notes

External links


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