Back to business again: Walter inspired me to work on my design again using bulges. RA raised a valid point too, as the CT in fact does not allow me to lay down any replacements before 1931. The two ships allowed because I retained vessels build before 1911 are OPHION and HYPERION. Anyway, below is the result of what I have now.
Modifications are
- change of date (1931)
- using adequate shell weights
- use of bulges
- increase in stability and of seakeeping
- increase in range (higher average speed)
- increase of barbet armor (now 380mm)
- deeper and thicker torpedo bulkhead (incresed underwater protection)
- increase of misc weight
Personally I think the design reached a point where it probably doesn´t make much sense to spend more time on it, trying to find another 10mm of armor somewhere or squeeze even more misc weight into her hull.
Thanks for your input.
HoOmAn
Design 29N, South African Battleship laid down 1931
Displacement:
37.596 t light; 39.685 t standard; 43.780 t normal; 47.056 t full load
Dimensions: Length overall / water x beam x draught
817,03 ft / 797,24 ft x 91,86 ft (Bulges 104,99 ft) x 30,51 ft (normal load)
249,03 m / 243,00 m x 28,00 m (Bulges 32,00 m) x 9,30 m
Armament:
9 - 14,96" / 380 mm guns (3x3 guns), 1.818,81lbs / 825,00kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
9 - 5,91" / 150 mm guns (3x3 guns), 101,41lbs / 46,00kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, all raised mounts - superfiring
16 - 4,13" / 105 mm guns (8x2 guns), 35,27lbs / 16,00kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
16 - 1,57" / 40,0 mm guns (6 mounts), 1,95lbs / 0,89kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0,79" / 20,0 mm guns (4x6 guns), 0,24lbs / 0,11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 17.884 lbs / 8.112 kg
Shells per gun, main battery: 120
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15,7" / 400 mm 452,43 ft / 137,90 m 14,44 ft / 4,40 m
Ends: Unarmoured
Main Belt covers 87% of normal length
- Torpedo Bulkhead and Bulges:
1,77" / 45 mm 452,43 ft / 137,90 m 29,53 ft / 9,00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15,7" / 400 mm 12,6" / 320 mm 15,0" / 380 mm
2nd: 3,94" / 100 mm 2,36" / 60 mm 3,15" / 80 mm
3rd: 0,79" / 20 mm 0,39" / 10 mm -
4th: 0,59" / 15 mm - -
5th: 0,39" / 10 mm - -
- Armour deck: 5,91" / 150 mm, Conning tower: 14,96" / 380 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 140.750 shp / 105.000 Kw = 29,18 kts
Range 8.600nm at 18,00 kts
Bunker at max displacement = 7.371 tons
Complement:
1.513 - 1.967
Cost:
£15,918 million / $63,671 million
Distribution of weights at normal displacement:
Armament: 2.075 tons, 4,7%
Armour: 15.157 tons, 34,6%
- Belts: 4.463 tons, 10,2%
- Torpedo bulkhead: 876 tons, 2,0%
- Armament: 3.566 tons, 8,1%
- Armour Deck: 5.852 tons, 13,4%
- Conning Tower: 400 tons, 0,9%
Machinery: 4.209 tons, 9,6%
Hull, fittings & equipment: 16.055 tons, 36,7%
Fuel, ammunition & stores: 6.184 tons, 14,1%
Miscellaneous weights: 100 tons, 0,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
54.994 lbs / 24.945 Kg = 32,8 x 15,0 " / 380 mm shells or 8,7 torpedoes
Stability (Unstable if below 1.00): 1,03
Metacentric height 4,7 ft / 1,4 m
Roll period: 20,4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,68
Seaboat quality (Average = 1.00): 1,05
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,600
Length to Beam Ratio: 7,59 : 1
'Natural speed' for length: 28,24 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 4,92 ft / 1,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25,75 ft / 7,85 m
- Forecastle (22%): 20,01 ft / 6,10 m
- Mid (50%): 20,01 ft / 6,10 m
- Quarterdeck (15%): 20,01 ft / 6,10 m
- Stern: 20,01 ft / 6,10 m
- Average freeboard: 20,52 ft / 6,25 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87,3%
- Above water (accommodation/working, high = better): 135,0%
Waterplane Area: 53.565 Square feet or 4.976 Square metres
Displacement factor (Displacement / loading): 109%
Structure weight / hull surface area: 202 lbs/sq ft or 987 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,99
- Longitudinal: 1,00
- 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