WesWorld

Riga Class
-Riga

The main mission of this ship is to guard the entrance to the Gulf of Riga, in conjunction with land-based air, coast artillery, and mines. It is based on a upscaled version of the Russian Navy's Varyag class cruisers, with improved armour, better turret firing arcs, dual purpose guns, and more speed.

Riga, Latvian Armored Ship laid down 1934

Displacement:
7,517 t light; 7,977 t standard; 8,560 t normal; 9,026 t full load

Dimensions: Length overall / water x beam x draught
522.36 ft / 515.42 ft x 55.77 ft (Bulges 65.62 ft) x 17.72 ft (normal load)
159.22 m / 157.10 m x 17.00 m (Bulges 20.00 m) x 5.40 m

Armament:
6 - 9.21" / 234 mm guns (3x2 guns), 440.92lbs / 200.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 5.12" / 130 mm guns (4x2 guns), 79.37lbs / 36.00kg shells, 1934 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
8 - 1.46" / 37.0 mm guns (2x4 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on centreline, evenly spread, all raised mounts - superfiring
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1934 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 3,318 lbs / 1,505 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.87" / 200 mm 262.47 ft / 80.00 m 9.19 ft / 2.80 m
Ends: 2.76" / 70 mm 252.62 ft / 77.00 m 9.19 ft / 2.80 m
Upper: 2.76" / 70 mm 262.47 ft / 80.00 m 8.20 ft / 2.50 m
Main Belt covers 78 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.66" / 220 mm 3.35" / 85 mm 5.91" / 150 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -

- Armour deck: 2.76" / 70 mm, Conning tower: 6.69" / 170 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 22,747 shp / 16,969 Kw = 23.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 1,049 tons

Complement:
444 - 578

Cost:
£3.246 million / $12.984 million

Distribution of weights at normal displacement:
Armament: 365 tons, 4.3 %
Armour: 2,852 tons, 33.3 %
- Belts: 1,327 tons, 15.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 489 tons, 5.7 %
- Armour Deck: 977 tons, 11.4 %
- Conning Tower: 60 tons, 0.7 %
Machinery: 654 tons, 7.6 %
Hull, fittings & equipment: 3,576 tons, 41.8 %
Fuel, ammunition & stores: 1,043 tons, 12.2 %
Miscellaneous weights: 70 tons, 0.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,399 lbs / 6,531 Kg = 36.8 x 9.2 " / 234 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 2.7 ft / 0.8 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.56
Seaboat quality (Average = 1.00): 1.34

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 7.86 : 1
'Natural speed' for length: 22.70 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.92 ft / 7.90 m
- Forecastle (25 %): 16.40 ft / 5.00 m
- Mid (50 %): 13.45 ft / 4.10 m
- Quarterdeck (20 %): 13.12 ft / 4.00 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 15.56 ft / 4.74 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.0 %
- Above water (accommodation/working, high = better): 115.3 %
Waterplane Area: 19,154 Square feet or 1,779 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 118 lbs/sq ft or 578 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily