Posting for Stuart again, who is doing fairly well in Iraq! Designs are posted with some of Stuarts comments.
1937 Izmails
Izmail class, Russian Battlecruisers laid down 1913 (Engine 1937)
Displacement:
33,602 t light; 35,658 t standard; 39,685 t normal; 42,906 t full load
Dimensions: Length overall / water x beam x draught
808.12 ft / 790.68 ft x 100.07 ft (Bulges 111.55 ft) x 31.50 ft (normal load)
246.32 m / 241.00 m x 30.50 m (Bulges 34.00 m) x 9.60 m
Armament:
8 - 16.54" / 420 mm guns (4x2 guns), 2,645.55lbs / 1,200.00kg shells, 1913 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread
Aft Main mounts separated by engine room
18 - 5.12" / 130 mm guns (6x3 guns), 67.03lbs / 30.40kg shells, 1936 Model
Breech loading guns in deck mounts with hoists
on centreline, all amidships, 2 raised mounts - superfiring
48 - 1.46" / 37.0 mm guns (12x4 guns), 1.55lbs / 0.70kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 4 raised mounts
Weight of broadside 22,445 lbs / 10,181 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.84" / 250 mm 508.53 ft / 155.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 99 % of normal length
- Torpedo Bulkhead and Bulges:
1.18" / 30 mm 508.53 ft / 155.00 m 30.51 ft / 9.30 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 7.87" / 200 mm 9.84" / 250 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -
- Armour deck: 4.72" / 120 mm, Conning tower: 13.78" / 350 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 143,115 shp / 106,764 Kw = 30.00 kts
Range 9,700nm at 18.00 kts
Bunker at max displacement = 7,248 tons
Complement:
1,405 - 1,827
Cost:
£4.107 million / $16.428 million
Distribution of weights at normal displacement:
Armament: 2,421 tons, 6.1 %
Armour: 10,932 tons, 27.5 %
- Belts: 2,799 tons, 7.1 %
- Torpedo bulkhead: 678 tons, 1.7 %
- Armament: 2,503 tons, 6.3 %
- Armour Deck: 4,607 tons, 11.6 %
- Conning Tower: 345 tons, 0.9 %
Machinery: 3,967 tons, 10.0 %
Hull, fittings & equipment: 16,232 tons, 40.9 %
Fuel, ammunition & stores: 6,083 tons, 15.3 %
Miscellaneous weights: 50 tons, 0.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
45,891 lbs / 20,816 Kg = 20.3 x 16.5 " / 420 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 6.4 ft / 2.0 m
Roll period: 18.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.12
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 7.09 : 1
'Natural speed' for length: 28.12 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 37.40 ft / 11.40 m
- Forecastle (21 %): 26.25 ft / 8.00 m
- Mid (28 %): 26.25 ft / 8.00 m (18.04 ft / 5.50 m aft of break)
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 21.28 ft / 6.49 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.8 %
- Above water (accommodation/working, high = better): 135.4 %
Waterplane Area: 52,716 Square feet or 4,897 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 210 lbs/sq ft or 1,027 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.24
- 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
Izmail class refit includes: New lengthened bow, replacement of triple 356mm turrets with twin 420mm
turrets, removal of casemate mounts, addition of secondary and antiaircraft batteries in deck mounts
with hoists, new engines, addition of air and surface search radar, removal of upper belt armor,
increased main belt and deck armor, and anti-torpedo bulges.