Spain
12 cm/45 (4.7") Mark F
Updated 18 February 2012
A Vickers-Armstrong design used as anti-aircraft guns on the Canaris and rebuilt Mendez Nunez cruisers.  Of built-up construction and used a semi-automatic breech-block.
WNSpain_8-50_m1924_Canaris_pic.jpg

Heavy Cruiser Canaris
Armada Española Photograph
WNSpain_47-45_mkf_Mendez_Nunez_pic.jpg

Mendez Nunez as AA cruiser
Armada Española Photograph
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Gun Characteristics
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Designation 12 cm/45 (4.7") Mark F
Ship Class Used On Canaris and Mendez Nunez Classes
Date Of Design About 1933
Date In Service 1935
Gun Weight 2.95 tons (3.0 mt)
Gun Length oa 224 in. (5.692 m)
Bore Length 212.6 in (5.400 m)
Rifling Length 212.6 in. (5.400 m)
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume 630 in3 (10.32 dm3)
Rate Of Fire 15 - 20 rounds per minute
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Ammunition
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Type Separate
Weight of Complete Round 79.4 lbs. (36 kg)
Projectile Types and Weights HE - 48.5 lbs. (22 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge 14.33 lbs. (6.5 kg)
Cartridge - 30.9 lbs. (14 kg)
Muzzle Velocity HE - 2,800 fps (853 mps)
Working Pressure 20 tons/in2 (3,150 kg/cm2)
Approximate Barrel Life N/A
Ammunition stowage per gun N/A
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Range
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Elevation With 48.5 lbs. (22 kg) HE Shell
Range @ 45 Degrees about 22,000 yards (20,000 m)
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Mount / Turret Data
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Designation Single half-shield Mountings
  Canaris (8) and Mendez Nunez (8)
Weight  N/A
Elevation -5 / +80 degrees
Elevation Rate N/A
Train about +120 / -120 degrees
Train Rate N/A
Gun recoil N/A
Notes:

1) The loading gear was powered by compressed air.

2) Mendez Nunez was originally equipped with six 6"/45 (15.2 cm) guns.  She was rebuilt and rearmed as an AA-cruiser during 1944.
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Data from
"Naval Weapons of World War Two" by John Campbell
"Cruisers of World War Two:  An International Encyclopedia" by M.J. Whitley
and
Tony DiGiulian's personal files
Page History

10 August 2003 - Benchmark
18 February 2012 - Updated to latest template, added mounting note, picture of Mendez Nunez