Swego czasu pojawiły się na blogu dwa warianty pancernika zaprojektowanego przez Yuzuru Hiragę – pełnoskalowy dla Japonii (http://springsharp.blogspot.com/2020/07/pancernik-hiragi.html) oraz mniejszy dla Mandżukuo (http://springsharp.blogspot.com/2020/09/may-pancernik-dla-mandzukuo.html). Kolejny z „małych” pancerników Hiragi jaki postanowiłem zaprezentować, to wariant 20.000-tonowy z 6 działami 360 mm. Ten okręt trafia do floty Peru, która nigdy nie dorobiła się pancernika a miała za sąsiada np. Chile z drednotem Almirante Latorre uzbrojonym w 14-calówki. Więc przeciwwaga w postaci okrętu dość małego, ale jednak dużo nowocześniejszego, lepiej opancerzonego i uzbrojonego w działa podobnego kalibru, wydaje się być jak najbardziej na miejscu:)
Atahualpa, peruvian battleship laid down 1935 (Engine 1936)
Displacement:
19 762 t light; 20 859 t standard; 22 298 t normal; 23 449 t full load
Dimensions: Length overall / water x beam x draught
616,98 ft / 607,02 ft x 88,71 ft x 26,64 ft (normal load)
188,06 m / 185,02 m x 27,04 m x 8,12 m
Armament:
6 - 14,17" / 360 mm guns (2x3 guns), 1 423,56lbs / 645,72kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 5,51" / 140 mm guns in single mounts, 83,72lbs / 37,97kg shells, 1933 Model
Quick firing guns in casemate mounts
on side, all amidships
12 guns in hull casemates - Limited use in heavy seas
4 - 5,51" / 140 mm guns (2x2 guns), 83,72lbs / 37,97kg shells, 1933 Model
Quick firing guns in turrets (on barbettes)
on side, all amidships
8 - 4,72" / 120 mm guns (4x2 guns), 52,72lbs / 23,91kg shells, 1921 Model
Anti-aircraft guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 10 310 lbs / 4 677 kg
Shells per gun, main battery: 110
2 - 21,0" / 533 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12,5" / 318 mm 276,44 ft / 84,26 m 13,32 ft / 4,06 m
Ends: Unarmoured
Upper: 11,0" / 279 mm 258,99 ft / 78,94 m 4,99 ft / 1,52 m
Main Belt covers 70% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
2,24" / 57 mm 276,44 ft / 84,26 m 24,74 ft / 7,54 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13,5" / 343 mm 11,0" / 279 mm 13,5" / 343 mm
2nd: 5,98" / 152 mm - -
3rd: 5,00" / 127 mm 2,99" / 76 mm 5,00" / 127 mm
4th: 1,85" / 47 mm 0,98" / 25 mm -
- Armour deck: 2,68" / 68 mm (6,00" / 152 mm over citadel), Conning tower: 14,02" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 64 118 shp / 47 832 Kw = 26,00 kts
Range 8 400nm at 14,00 kts
Bunker at max displacement = 2 590 tons
Complement:
912 - 1 186
Cost:
£10,315 million / $41,260 million
Distribution of weights at normal displacement:
Armament: 1 289 tons, 5,8%
Armour: 7 612 tons, 34,1%
- Belts: 2 850 tons, 12,8%
- Torpedo bulkhead: 568 tons, 2,5%
- Armament: 2 104 tons, 9,4%
- Armour Deck: 1 851 tons, 8,3%
- Conning Tower: 239 tons, 1,1%
Machinery: 1 799 tons, 8,1%
Hull, fittings & equipment: 9 012 tons, 40,4%
Fuel, ammunition & stores: 2 536 tons, 11,4%
Miscellaneous weights: 50 tons, 0,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
32 006 lbs / 14 518 Kg = 22,5 x 14,2 " / 360 mm shells or 5,3 torpedoes
Stability (Unstable if below 1.00): 1,14
Metacentric height 5,3 ft / 1,6 m
Roll period: 16,1 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0,58
Seaboat quality (Average = 1.00): 1,27
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,544
Length to Beam Ratio: 6,84 : 1
'Natural speed' for length: 24,64 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 19,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28,94 ft / 8,82 m
- Forecastle (30%): 20,93 ft / 6,38 m
- Mid (50%): 19,95 ft / 6,08 m
- Quarterdeck (28%): 17,45 ft / 5,32 m
- Stern: 17,95 ft / 5,47 m
- Average freeboard: 20,38 ft / 6,21 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92,6%
- Above water (accommodation/working, high = better): 152,5%
Waterplane Area: 37 372 Square feet or 3 472 Square metres
Displacement factor (Displacement / loading): 103%
Structure weight / hull surface area: 170 lbs/sq ft or 829 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,94
- Longitudinal: 1,66
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
1 catapult, 1 seaplane