Employs a pendulum loader and a flick rammer to obtain a high rate of fire. After ramming, the shell separates from the cartridge. Bofors claims that this unusual process decreases barrel wear and also retains the cartridge case firmly in place until the breechblock has closed.
This mount was considered to be extremely advanced when it first appeared in 1950 and the Swedish Navy was quite happy with this weapon system on their ships. The Netherlands Navy found them to be very reliable once some early training problems were overcome. However, when inspected by the British in 1953, it was rejected as being too heavy, too noisy and not gas- or flash-tight.
|Designation||Sweden: 12 cm/50 (4.7") Model 1950
Netherlands: 120 mm Mark 10
|Ship Class Used On||Netherlands Tromp Class
Swedish Halland Class
Colombian Siete de Julio Class
|Date Of Design||1944 - 1950|
|Date In Service||1950|
|Bore Length||about 236.2 in (6.000 m)|
|Rate Of Fire||42 - 45 rounds per minute
(42 gives the optimum dispersion)
|Designation||Twin Turrets: Tromp (2) and Halland (2)|
|Weight||114,600 lbs. (52,000 kg) 1|
|Elevation||-10 / +85 degrees|
|Elevation Rate||40 degrees per second|
|Train||about +150 / -150 degrees|
|Train Rate||25 degrees per second|
- ^The mountings originally weighed about 143,300 lbs. (65,000 kg). This was reduced to the above figure by removing the emergency diesel engine, the fuze setting mechanisms and the local fire control equipment.