Main changes:
- Main belt thickness increased from 6in to 9in
- Upper belt thickness increased from 1,5in to 6in
- Deck armour increased from 3in to 3,5in
- 2 76mm AA guns replaced by 4 4in AA guns
- 3 new 40mm quadruple mounts added
- 5 new 20mm mounts added
- Miscellaneous weight and shells per main gun reduced in order to balance the ship.
As the engines are not upgraded the ships are 1,5 knots slower and the light displacement is increased from 29299 tons to 30215 tons.
HMS Repulse / HMS Renown, British Battlecruisers laid down 1915
Displacement:
30.215 t light; 31.573 t standard; 34.281 t normal; 36.309 t full load
Dimensions: Length overall / water x beam x draught
787,70 ft / 787,70 ft x 90,00 ft x 29,18 ft (normal load)
240,09 m / 240,09 m x 27,43 m x 8,89 m
Armament:
6 - 15,00" / 381 mm guns (3x2 guns), 1.687,50lbs / 765,44kg shells, 1915 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
Main guns limited to end-on fire
17 - 4,00" / 102 mm guns (7 mounts), 31,99lbs / 14,51kg shells, 1915 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1921 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
12 - 1,57" / 40,0 mm guns (3x4 guns), 1,95lbs / 0,88kg shells, 1921 Model
Breech loading guns in deck mounts
on side, evenly spread
10 - 0,79" / 20,0 mm guns (5x2 guns), 0,24lbs / 0,11kg shells, 1921 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 10.823 lbs / 4.909 kg
Shells per gun, main battery: 110
2 - 21,0" / 533,4 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9,00" / 229 mm 620,00 ft / 188,98 m 12,00 ft / 3,66 m
Ends: 3,00" / 76 mm 160,00 ft / 48,77 m 12,00 ft / 3,66 m
7,70 ft / 2,35 m Unarmoured ends
Upper: 6,00" / 152 mm 480,00 ft / 146,30 m 8,00 ft / 2,44 m
Main Belt covers 121 % of normal length
- Torpedo Bulkhead:
1,50" / 38 mm 480,00 ft / 146,30 m 26,00 ft / 7,92 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10,0" / 254 mm 9,00" / 229 mm 7,50" / 191 mm
2nd: 2,00" / 51 mm - -
- Armour deck: 3,50" / 89 mm, Conning tower: 10,00" / 254 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 131.894 shp / 98.393 Kw = 30,00 kts
Range 7.400nm at 15,00 kts (Bunkerage = 4.873 tons)
Complement:
1.259 - 1.637
Cost:
£4,209 million / $16,834 million
Distribution of weights at normal displacement:
Armament: 1.353 tons, 3,9 %
Armour: 10.053 tons, 29,3 %
- Belts: 3.941 tons, 11,5 %
- Torpedo bulkhead: 693 tons, 2,0 %
- Armament: 1.979 tons, 5,8 %
- Armour Deck: 3.212 tons, 9,4 %
- Conning Tower: 228 tons, 0,7 %
Machinery: 4.996 tons, 14,6 %
Hull, fittings & equipment: 13.713 tons, 40,0 %
Fuel, ammunition & stores: 4.066 tons, 11,9 %
Miscellaneous weights: 100 tons, 0,3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38.858 lbs / 17.626 Kg = 23,0 x 15,0 " / 381 mm shells or 4,2 torpedoes
Stability (Unstable if below 1.00): 1,09
Metacentric height 5,0 ft / 1,5 m
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 1,00
Seaboat quality (Average = 1.00): 1,44
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0,580
Length to Beam Ratio: 8,75 : 1
'Natural speed' for length: 28,07 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32,00 ft / 9,75 m
- Forecastle (20 %): 30,00 ft / 9,14 m
- Mid (50 %): 30,00 ft / 9,14 m
- Quarterdeck (25 %): 20,00 ft / 6,10 m (30,00 ft / 9,14 m before break)
- Stern: 20,00 ft / 6,10 m
- Average freeboard: 27,66 ft / 8,43 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101,4 %
- Above water (accommodation/working, high = better): 225,2 %
Waterplane Area: 49.610 Square feet or 4.609 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 177 lbs/sq ft or 865 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,42
- Overall: 1,00
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