Perkunas-class Armoured Cruiser (1906)

Perkunas-class, Liotainian Armoured Cruiser laid down 1906

Displacement:
 13,094 t light; 13,776 t standard; 15,129 t normal; 16,211 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (577.43 ft / 574.15 ft) x 68.90 ft x (26.25 / 27.67 ft)
 (176.00 m / 175.00 m) x 21.00 m x (8.00 / 8.43 m)

Armament:

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     8 - 9.84" / 250 mm 45.0 cal guns - 480.81lbs / 218.09kg shells, 130 per gun

```

 Breech loading guns in turret on barbette mounts, 1906 Model
 2 x 2-gun mounts on centreline ends, evenly spread
 2 x 2-gun mounts on sides, forward deck aft

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     16 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 150 per gun

```

 Quick firing guns in casemate mounts, 1894 Model
 16 x Single mounts on sides, evenly spread
 4 hull mounts in casemates- Limited use in heavy seas

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     10 - 2.36" / 60.0 mm 50.0 cal guns - 6.99lbs / 3.17kg shells, 300 per gun

```

 Quick firing guns in deck mounts, 1906 Model
 10 x Single mounts on sides, evenly spread

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     Weight of broadside 4,998 lbs / 2,267 kg

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Armour:

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  - Belts:		Width (max)	Length (avg)		Height (avg)

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 Main: 5.91" / 150 mm 465.88 ft / 142.00 m 9.84 ft / 3.00 m
 Ends: 2.36" / 60 mm 98.43 ft / 30.00 m 9.84 ft / 3.00 m
 9.84 ft / 3.00 m Unarmoured ends
 Upper: 2.36" / 60 mm 465.88 ft / 142.00 m 4.27 ft / 1.30 m
 Main Belt covers 125 % of normal length

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  - Torpedo Bulkhead - Additional damage containing bulkheads:

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 1.57" / 40 mm 465.88 ft / 142.00 m 23.33 ft / 7.11 m
 Beam between torpedo bulkheads 59.71 ft / 18.20 m

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

```

 Main: 5.91" / 150 mm 3.94" / 100 mm 3.94" / 100 mm
 2nd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
 3rd: 1.18" / 30 mm - -

```
  - Armoured deck - multiple decks:

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 For and Aft decks: 2.56" / 65 mm
 Forecastle: 0.79" / 20 mm Quarter deck: 0.79" / 20 mm

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  - Conning towers: Forward 5.12" / 130 mm, Aft 2.36" / 60 mm

```

Machinery:
 Oil fired boilers, steam turbines,
 Direct drive, 3 shafts, 53,350 shp / 39,799 Kw = 26.50 kts
 Range 6,500nm at 12.00 kts
 Bunker at max displacement = 2,435 tons

Complement:
 681 - 886

Cost:
 £1.359 million / $5.434 million

Distribution of weights at normal displacement:
 Armament: 1,271 tons, 8.4 %
 - Guns: 1,271 tons, 8.4 %
 Armour: 3,802 tons, 25.1 %
 - Belts: 1,357 tons, 9.0 %
 - Torpedo bulkhead: 633 tons, 4.2 %
 - Armament: 607 tons, 4.0 %
 - Armour Deck: 1,106 tons, 7.3 %
 - Conning Towers: 99 tons, 0.7 %
 Machinery: 3,464 tons, 22.9 %
 Hull, fittings & equipment: 4,307 tons, 28.5 %
 Fuel, ammunition & stores: 2,035 tons, 13.5 %
 Miscellaneous weights: 250 tons, 1.7 %
 - Hull below water: 60 tons
 - Hull above water: 100 tons
 - On freeboard deck: 60 tons
 - Above deck: 30 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
 15,378 lbs / 6,975 Kg = 32.3 x 9.8 " / 250 mm shells or 2.3 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 4.2 ft / 1.3 m
 Roll period: 14.1 seconds
 Steadiness - As gun platform (Average = 50 %): 63 %
 - Recoil effect (Restricted arc if above 1.00): 0.55
 Seaboat quality (Average = 1.00): 1.26

Hull form characteristics:
 Hull has rise forward of midbreak,
 a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.510 / 0.518
 Length to Beam Ratio: 8.33 : 1
 'Natural speed' for length: 23.96 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -10.00 degrees
 Stern overhang: -1.64 ft / -0.50 m
 Freeboard (% = length of deck as a percentage of waterline length):
 Fore end, Aft end
 - Forecastle: 20.00 %, 26.57 ft / 8.10 m, 21.65 ft / 6.60 m
 - Forward deck: 40.00 %, 21.65 ft / 6.60 m, 21.33 ft / 6.50 m
 - Aft deck: 25.00 %, 10.83 ft / 3.30 m, 10.83 ft / 3.30 m
 - Quarter deck: 15.00 %, 10.83 ft / 3.30 m, 11.15 ft / 3.40 m
 - Average freeboard: 17.68 ft / 5.39 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 116.8 %
 - Above water (accommodation/working, high = better): 129.4 %
 Waterplane Area: 26,598 Square feet or 2,471 Square metres
 Displacement factor (Displacement / loading): 101 %
 Structure weight / hull surface area: 123 lbs/sq ft or 600 Kg/sq metre
 Hull strength (Relative):
 - Cross-sectional: 0.96
 - Longitudinal: 1.44
 - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Good seaboat, rides out heavy weather easily

Ships in Class:
- Perkunas
- Pergalingas