Orbaizeta-class Cruiser (1883)

Orbaizeta-class, Syrellian Protected Cruisers laid down 1883
Barbette ship

Displacement:
 2,717 t light; 2,866 t standard; 3,226 t normal; 3,514 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (295.28 ft / 285.43 ft) x 42.16 ft x (17.06 / 18.30 ft)
 (90.00 m / 87.00 m) x 12.85 m x (5.20 / 5.58 m)

Armament:

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     2 - 7.48" / 190 mm 30.0 cal guns - 182.50lbs / 82.78kg shells, 110 per gun

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 Breech loading guns in open barbette mounts, 1883 Model
 2 x Single mounts on centreline ends, evenly spread

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     6 - 5.91" / 150 mm 32.0 cal guns - 90.39lbs / 41.00kg shells, 200 per gun

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 Breech loading guns in casemate mounts, 1883 Model
 6 x Single mounts on sides, evenly spread

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     2 - 2.95" / 75.0 mm 45.0 cal guns - 12.50lbs / 5.67kg shells, 150 per gun

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 Quick firing guns in deck mounts, 1885 Model
 2 x Single mounts on sides, forward deck aft
 2 raised mounts

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     Weight of broadside 932 lbs / 423 kg

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Armour:

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  - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)

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 Main: - - 1.97" / 50 mm
 2nd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
 3rd: 0.79" / 20 mm - -

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  - Protected deck - single deck:

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 For and Aft decks: 1.77" / 45 mm

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  - Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

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Machinery:
 Coal fired boilers, simple reciprocating steam engines,
 Direct drive, 1 shaft, 4,562 ihp / 3,403 Kw = 16.50 kts
 Range 3,500nm at 10.00 kts
 Bunker at max displacement = 648 tons (100% coal)

Complement:
 213 - 278

Cost:
 £0.258 million / $1.030 million

Distribution of weights at normal displacement:
 Armament: 128 tons, 4.0 %
 - Guns: 128 tons, 4.0 %
 Armour: 285 tons, 8.8 %
 - Armament: 73 tons, 2.3 %
 - Armour Deck: 202 tons, 6.3 %
 - Conning Tower: 9 tons, 0.3 %
 Machinery: 907 tons, 28.1 %
 Hull, fittings & equipment: 1,086 tons, 33.7 %
 Fuel, ammunition & stores: 509 tons, 15.8 %
 Miscellaneous weights: 310 tons, 9.6 %
 - Hull below water: 30 tons
 - Hull above water: 50 tons
 - On freeboard deck: 20 tons
 - Above deck: 210 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
 3,259 lbs / 1,478 Kg = 17.4 x 7.5 " / 190 mm shells or 0.8 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 2.0 ft / 0.6 m
 Roll period: 12.5 seconds
 Steadiness - As gun platform (Average = 50 %): 100 %
 - Recoil effect (Restricted arc if above 1.00): 0.72
 Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
 Hull has low forecastle, low quarterdeck ,
 a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.550 / 0.559
 Length to Beam Ratio: 6.77 : 1
 'Natural speed' for length: 16.89 kts
 Power going to wave formation at top speed: 47 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -15.00 degrees
 Stern overhang: -3.28 ft / -1.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
 Fore end, Aft end
 - Forecastle: 15.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
 - Forward deck: 30.00 %, 18.04 ft / 5.50 m, 18.04 ft / 5.50 m
 - Aft deck: 30.00 %, 18.04 ft / 5.50 m, 18.04 ft / 5.50 m
 - Quarter deck: 25.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
 - Average freeboard: 14.76 ft / 4.50 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 106.2 %
 - Above water (accommodation/working, high = better): 131.4 %
 Waterplane Area: 8,145 Square feet or 757 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 82 lbs/sq ft or 402 Kg/sq metre
 Hull strength (Relative):
 - Cross-sectional: 0.87
 - Longitudinal: 3.28
 - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather