And here's a revised design, with all of the beam 105mm's on the main deck level (after looking at the drawing and seeing there was room for them there).
Blucher, German Large Cruiser laid down 1931
Displacement:
20,038 t light; 20,982 t standard; 22,598 t normal; 23,890 t full load
Dimensions: Length overall / water x beam x draught
711.67 ft / 688.98 ft x 82.84 ft x 25.43 ft (normal load)
216.92 m / 210.00 m x 25.25 m x 7.75 m
Armament:
9 - 11.14" / 283 mm guns (3x3 guns), 727.53lbs / 330.00kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 4.13" / 105 mm guns (8x2 guns), 35.32lbs / 16.02kg shells, 1931 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread
2 - 4.13" / 105 mm guns (1x2 guns), 35.32lbs / 16.02kg shells, 1931 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1931 Model
Dual purpose guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 7,208 lbs / 3,270 kg
Shells per gun, main battery: 120
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.27" / 210 mm 444.39 ft / 135.45 m 10.93 ft / 3.33 m
Ends: Unarmoured
Main Belt covers 99 % of normal length
- Torpedo Bulkhead:
1.18" / 30 mm 444.39 ft / 135.45 m 23.26 ft / 7.09 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.45" / 240 mm 5.51" / 140 mm 8.27" / 210 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
4th: 0.79" / 20 mm 0.39" / 10 mm -
- Armour deck: 3.54" / 90 mm, Conning tower: 6.69" / 170 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 4 shafts, 104,837 shp / 78,208 Kw = 31.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 2,908 tons
Complement:
921 - 1,198
Cost:
£8.130 million / $32.520 million
Distribution of weights at normal displacement:
Armament: 861 tons, 3.8 %
Armour: 6,430 tons, 28.5 %
- Belts: 1,705 tons, 7.5 %
- Torpedo bulkhead: 452 tons, 2.0 %
- Armament: 1,452 tons, 6.4 %
- Armour Deck: 2,705 tons, 12.0 %
- Conning Tower: 115 tons, 0.5 %
Machinery: 3,135 tons, 13.9 %
Hull, fittings & equipment: 9,493 tons, 42.0 %
Fuel, ammunition & stores: 2,559 tons, 11.3 %
Miscellaneous weights: 120 tons, 0.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35,373 lbs / 16,045 Kg = 51.2 x 11.1 " / 283 mm shells or 4.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 4.5 ft / 1.4 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.72
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.545
Length to Beam Ratio: 8.32 : 1
'Natural speed' for length: 30.24 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.63 ft / 10.25 m
- Forecastle (21 %): 24.61 ft / 7.50 m
- Mid (50 %): 23.79 ft / 7.25 m
- Quarterdeck (15 %): 23.79 ft / 7.25 m
- Stern: 23.79 ft / 7.25 m
- Average freeboard: 24.82 ft / 7.56 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 204.6 %
Waterplane Area: 41,271 Square feet or 3,834 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 156 lbs/sq ft or 761 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- 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
120 tons reserved for aircraft and growth.