This is the navalized version of the 27 mm BK 27 aircraft gun used on the Tornado and Gripen fighter aircraft. Fire control is provided by a system from STN Atlas Elektronik with target tracking, fire control computation as well as gun control performed from a remote operator console. Sensors include a thermal imager, TV camera, laser range finder and automatic target tracking system with a video tracker.
This weapon was designed by Mauser-Werke Oberndorf Waffensysteme GmbH, a Rheinmetall DeTec subsidiary, to replace older 20 mm and 40 mm guns and the mounting does not require deck penetration. Can be operated remotely or locally with a joystick. 83 of these weapons have been ordered by the German Navy.
This weapon is a gas-operated automatic revolver cannon. Can be assembled for either left- or right-hand feed, and uses linkless ammunition with a case recovery system.
|Designation||27 mm MLG 27 Light Naval Gun System|
|Ship Class Used On||122, 123 and 124-class frigates, 332 and 333-class minehunters and minesweepers, 352-class mine countermeasures ships, 404-class tenders and 702-class supply ships
Planned for K 130 corvette class
|Date Of Design||about 1990 (Original aircraft design)|
|Date In Service||2003 (Navalized Version)|
|Gun Weight||37.5 lbs. (17kg)|
|Gun Length oa||91 in (2.310 m)|
|Number Of Grooves||N/A|
|Rate Of Fire||1,700 +/-100 rpm cyclic, lower training rates possible|
|Weight of Complete Round||FAPDS: 1.14 lbs. (0.516 kg)|
|Projectile Types and Weights||FAPDS: 0.57 lbs. (0.260 kg)|
|Bursting Charge||None (Frangible Bullet) 1|
|Projectile Length||FAPDS: 4.53 in (11.5 cm)
Complete Round: 9.6 in (24.3 cm)
|Cartridge||27 x 145 mm|
|Muzzle Velocity||3,600 fps (1,100 mps)|
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||90 rounds on mount|
Aircraft use HE and HE-SD ammunition.
- ^The Frangible Armor Piercing Discarding Sabot (FAPDS) round is used only with the Naval mount and consists of a brittle tungsten alloy penetrator ejection molded in a plastic sabot with a integral plastic band. The penetrator is designed to fragment even at low impact angles against thin plates. After the penetrator has punched through the outer shell of a hard or soft target (including those made of composite materials), the round disintegrates into fragments, which then progressively break up into a cascade of ever-smaller particles. The result is a high-energy cloud of fragments intended to cause severe damage to the interior of the target.
|Designation||Single Mount MLG 27|
|Weight||1,874 lbs. (850 kg)|
|Elevation||-15 / +60 degrees|
|Train||-170 / +170 degrees|
This mounting features a Gyro system which is LOS (Line of Sight) stabilized in two axes and powered by brushless servo-motors.
Although this weapon does not require deck penetration, it does require an 115 Vac @ 60 Hz electric supply.