G13,5" B, Great Britain light battlecruiser laid down 1925

Displacement:

21.553 t light; 22.461 t standard; 23.302 t normal; 23.975 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

(792,33 ft / 786,25 ft) x 82,00 ft x (23,00 / 23,51 ft)

(241,50 m / 239,65 m) x 24,99 m x (7,01 / 7,17 m)

Armament:

6 - 13,50" / 343 mm 45,0 cal guns - 1.240,68lbs / 562,76kg shells, 100 per gun

Breech loading guns in turret on barbette mounts, 1925 Model

1 x 3-gun mount on centreline, forward deck forward

1 x 3-gun mount on centreline, aft deck aft

10 - 4,00" / 102 mm 45,0 cal guns - 32,27lbs / 14,64kg shells, 150 per gun

Dual purpose guns in turret on barbette mounts, 1925 Model

5 x Twin mounts on sides, forward evenly spread

Weight of broadside 7.767 lbs / 3.523 kg

3 - 21,0" / 533 mm, 1,00 ft / 0,30 m torpedoes - 0,199 t each, 0,597 t total

In 3 sets of deck mounted carriage/fixed tubes

3 - 21,0" / 533 mm, 1,00 ft / 0,30 m torpedoes - 0,199 t each, 0,597 t total

In 3 sets of deck mounted carriage/fixed tubes

Armour:

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

Main: 9,00" / 229 mm 505,00 ft / 153,92 m 10,80 ft / 3,29 m

Ends: Unarmoured

Upper: 9,00" / 229 mm 505,00 ft / 153,92 m 8,00 ft / 2,44 m

Main Belt covers 99 % of normal length

- Torpedo Bulkhead:

1,00" / 25 mm 505,00 ft / 153,92 m 20,19 ft / 6,15 m

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

Main: 10,0" / 254 mm 5,00" / 127 mm 10,0" / 254 mm

2nd: 4,00" / 102 mm 4,00" / 102 mm 4,00" / 102 mm

- Armoured deck - multiple decks: 2,00" / 51 mm For and Aft decks

Forecastle: 2,00" / 51 mm Quarter deck: 2,00" / 51 mm

- Conning towers: Forward 2,00" / 51 mm, Aft 0,00" / 0 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 101.347 shp / 75.605 Kw = 30,40 kts

Range 7.600nm at 10,00 kts

Bunker at max displacement = 1.514 tons

Complement:

942 - 1.225

Cost:

£6,351 million / $25,404 million

Distribution of weights at normal displacement:

Armament: 1.650 tons, 7,1 %

- Guns: 1.648 tons, 7,1 %

- Torpedoes: 1 tons, 0,0 %

Armour: 7.074 tons, 30,4 %

- Belts: 3.545 tons, 15,2 %

- Torpedo bulkhead: 377 tons, 1,6 %

- Armament: 1.398 tons, 6,0 %

- Armour Deck: 1.719 tons, 7,4 %

- Conning Tower: 35 tons, 0,2 %

Machinery: 3.290 tons, 14,1 %

Hull, fittings & equipment: 9.439 tons, 40,5 %

Fuel, ammunition & stores: 1.749 tons, 7,5 %

Miscellaneous weights: 100 tons, 0,4 %

- On freeboard deck: 100 tons

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

37.719 lbs / 17.109 Kg = 30,7 x 13,5 " / 343 mm shells or 5,0 torpedoes

Stability (Unstable if below 1.00): 1,09

Metacentric height 4,4 ft / 1,3 m

Roll period: 16,5 seconds

Steadiness - As gun platform (Average = 50 %): 71 %

- Recoil effect (Restricted arc if above 1.00): 0,83

Seaboat quality (Average = 1.00): 1,41

Hull form characteristics:

Hull has rise forward of midbreak,

a ram bow and small transom stern

Block coefficient (normal/deep): 0,550 / 0,554

Length to Beam Ratio: 9,59 : 1

'Natural speed' for length: 30,05 kts

Power going to wave formation at top speed: 48 %

Trim (Max stability = 0, Max steadiness = 100): 50

Bow angle (Positive = bow angles forward): 8,00 degrees

Stern overhang: 2,00 ft / 0,61 m

Freeboard (% = length of deck as a percentage of waterline length):

Fore end, Aft end

- Forecastle: 20,00 %, 29,00 ft / 8,84 m, 28,00 ft / 8,53 m

- Forward deck: 45,00 %, 28,00 ft / 8,53 m, 28,00 ft / 8,53 m

- Aft deck: 17,00 %, 17,00 ft / 5,18 m, 17,00 ft / 5,18 m

- Quarter deck: 18,00 %, 17,00 ft / 5,18 m, 17,00 ft / 5,18 m

- Average freeboard: 24,23 ft / 7,39 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 98,5 %

- Above water (accommodation/working, high = better): 232,9 %

Waterplane Area: 46.104 Square feet or 4.283 Square metres

Displacement factor (Displacement / loading): 113 %

Structure weight / hull surface area: 152 lbs/sq ft or 743 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,94

- Longitudinal: 1,17

- Overall: 0,96

Caution: Hull subject to strain in open-sea

Hull space for machinery, storage, compartmentation is adequate

Room for accommodation and workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

Good seaboat, rides out heavy weather easily