Spanish
6"/50 (15.2 cm) Vickers-Carraca
Updated 05 September 2006
Based upon a Vickers design, these guns were manufactured in Spain by Carraca.  They were used on most Spanish cruisers built in the 1920s and 1930s in various mountings.  Built to Vickers Patterns Mark T and Mark U and were of built-up construction.
WNSpain_6-50_vc_Miguel_de_Cervantes_pic.jpg

Light Cruiser Miguel de Cervantes in 1953
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Images at The Vickers Photographic Archive

See Mark XXI

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Gun Characteristics
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Designation 6"/50 (15.2 cm) Vickers-Carraca
Ship Class Used On Navarra, Mendez Nuñez and Principe Alfonso Classes
Date Of Design about 1915
Date In Service 1923
Gun Weight 8.6 tons (8.74 mt)
Gun Length oa 309.7 in. (7.867 m)
Bore Length 300 in (7.620 m)
Rifling Length 261.7 in (6.648 m)
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume 1,550 in3 (25.4 dm3)
Rate Of Fire about 5 - 7 rounds per minute
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Ammunition
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Type Bag
Projectile Types and Weights AP - 100 lbs. (45.4 kg)
HE - 99.2 lbs. (45 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge 33 lbs. (15 kg)
Muzzle Velocity 2,953 fps (900 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A
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Range
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Elevation With 99.2 lbs. (45 kg) HE Shell
Range @15 Degrees about 20,000 yards (18,290 m)
Range @ 35 Degrees about 22,300 yards (20,400 m)
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Mount / Turret Data
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Designation Single Splinter Shielded Mount
   Navarra (9), Mendez Nuñez (6) and Principe Alfonso (2)

Twin Splinter Shielded Mounts
   Principe Alfonso (3)
Weight  N/A
Elevation Navarra and Mendez Nunez:  -5 / +15 degrees 

Principe Alfonso:  -10 / +35 degrees
Elevation Rate N/A
Train about +150 / -150 degrees
Train Rate N/A
Gun recoil N/A
Loading Angle N/A
Notes:

1) When first commissioned, Navarra had only her aftermost gun on the centerline.  When she was rebuilt in 1936 three guns were removed, but the remainder were all relocated on the centerline.

2) Mendez Nuñez was rearmed with eight 12 cm/45 (4.7") Vickers-Armstrong guns in 1944.
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Data from
"Naval Weapons of World War Two" by John Campbell
"Cruisers of World War Two" by M.J. Whitley
and
Tony DiGiulian's personal files