WesWorld

Project 8400, generic CDS laid down 1924 (Engine 1936)

Displacement:
8,350 t light; 8,929 t standard; 10,000 t normal; 10,857 t full load

Dimensions: Length overall / water x beam x draught
413.88 ft / 393.70 ft x 70.87 ft (Bulges 79.07 ft) x 21.65 ft (normal load)
126.15 m / 120.00 m x 21.60 m (Bulges 24.10 m) x 6.60 m

Armament:
6 - 11.02" / 280 mm guns (2x3 guns), 669.80lbs / 303.81kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 3.94" / 100 mm guns (2x2 guns), 30.51lbs / 13.84kg shells, 1924 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 3.94" / 100 mm guns (4x2 guns), 30.51lbs / 13.84kg shells, 1924 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
24 - 1.46" / 37.0 mm guns (6x4 guns), 1.55lbs / 0.70kg shells, 1924 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.91" / 23.0 mm guns (4x2 guns), 0.37lbs / 0.17kg shells, 1924 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 4,425 lbs / 2,007 kg
Shells per gun, main battery: 150
4 - 0.0" / 0 mm above water torpedoes, 21 - 0.0" / 0 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.09" / 180 mm 255.91 ft / 78.00 m 10.10 ft / 3.08 m
Ends: 1.18" / 30 mm 137.78 ft / 42.00 m 10.10 ft / 3.08 m
Upper: 118.0" / 2,997 mm 255.91 ft / 78.00 m 0.00 ft / 0.00 m
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.27" / 210 mm 3.94" / 100 mm 6.50" / 165 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 1.00" / 25 mm
3rd: 1.18" / 30 mm 0.79" / 20 mm 1.00" / 25 mm
4th: 0.39" / 10 mm 0.10" / 3 mm -
5th: 0.39" / 10 mm 0.10" / 3 mm -

- Armour deck: 3.35" / 85 mm, Conning tower: 7.09" / 180 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 13,664 shp / 10,193 Kw = 19.00 kts
Range 8,500nm at 15.00 kts
Bunker at max displacement = 1,927 tons

Complement:
499 - 650

Cost:
£2.505 million / $10.022 million

Distribution of weights at normal displacement:
Armament: 553 tons, 5.5 %
Armour: 2,630 tons, 26.3 %
- Belts: 869 tons, 8.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 517 tons, 5.2 %
- Armour Deck: 1,173 tons, 11.7 %
- Conning Tower: 71 tons, 0.7 %
Machinery: 383 tons, 3.8 %
Hull, fittings & equipment: 4,384 tons, 43.8 %
Fuel, ammunition & stores: 1,650 tons, 16.5 %
Miscellaneous weights: 400 tons, 4.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,015 lbs / 7,264 Kg = 23.9 x 11.0 " / 280 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 4.3 ft / 1.3 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.40

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.519
Length to Beam Ratio: 4.98 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 10.00 ft / 3.05 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.83 ft / 6.65 m
- Forecastle (20 %): 13.89 ft / 4.23 m
- Mid (50 %): 13.89 ft / 4.23 m
- Quarterdeck (15 %): 13.89 ft / 4.23 m
- Stern: 13.89 ft / 4.23 m
- Average freeboard: 14.53 ft / 4.43 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.3 %
- Above water (accommodation/working, high = better): 100.3 %
Waterplane Area: 18,923 Square feet or 1,758 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 161 lbs/sq ft or 786 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.09
- Longitudinal: 2.74
- Overall: 1.20
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

400 tons miscellaneous for future improvements.

Quoted

Originally posted by Vukovlad
The drawing and SIM arent very alike and the quadruppel 100mm DP guns might be a problem

Thanks for pointing that secondary gaff out, will be edited.

H.

This is Project 8400-to be discussed with Holland well after Siam gets the Narden into service.

The Narden should be as you originally discussed, and as you originally optimized.

H.