Here's a new DD (though she counts as a CL under the Treaty) for the Kriegsmarine. Apparently France and Germany are thinking along similar, though not identical, lines right now.....
(Picture by Wes, with minor turret modifications to look more like the fore turret on Z-31 by me)
KM Lebrecht Maas, German Heavy Destroyer laid down 1933
Displacement:
2,852 t light; 2,979 t standard; 3,288 t normal; 3,536 t full load
Dimensions: Length overall / water x beam x draught
483.15 ft / 465.88 ft x 44.29 ft x 13.94 ft (normal load)
147.26 m / 142.00 m x 13.50 m x 4.25 m
Armament:
6 - 5.91" / 150 mm guns (3x2 guns), 100.31lbs / 45.50kg shells, 1933 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 3.46" / 88.0 mm guns (2x2 guns), 20.79lbs / 9.43kg shells, 1933 Model
Dual purpose guns in deck mounts
on centreline, all aft, all raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 699 lbs / 317 kg
Shells per gun, main battery: 150
8 - 23.6" / 600 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.76" / 70 mm 1.57" / 40 mm 2.76" / 70 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm -
3rd: 0.79" / 20 mm 0.79" / 20 mm -
4th: 0.39" / 10 mm 0.39" / 10 mm -
- Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 57,418 shp / 42,834 Kw = 35.50 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 557 tons
Complement:
216 - 282
Cost:
£1.846 million / $7.384 million
Distribution of weights at normal displacement:
Armament: 89 tons, 2.7 %
Armour: 80 tons, 2.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 67 tons, 2.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 13 tons, 0.4 %
Machinery: 1,540 tons, 46.8 %
Hull, fittings & equipment: 1,093 tons, 33.2 %
Fuel, ammunition & stores: 436 tons, 13.3 %
Miscellaneous weights: 50 tons, 1.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,018 lbs / 462 Kg = 9.9 x 5.9 " / 150 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.52 : 1
'Natural speed' for length: 24.86 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.07 ft / 8.25 m
- Forecastle (20 %): 22.15 ft / 6.75 m
- Mid (40 %): 22.15 ft / 6.75 m (15.58 ft / 4.75 m aft of break)
- Quarterdeck (15 %): 15.58 ft / 4.75 m
- Stern: 15.58 ft / 4.75 m
- Average freeboard: 18.60 ft / 5.67 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 173.7 %
- Above water (accommodation/working, high = better): 135.5 %
Waterplane Area: 13,182 Square feet or 1,225 Square metres
Displacement factor (Displacement / loading): 78 %
Structure weight / hull surface area: 45 lbs/sq ft or 220 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.55
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
10 tons reserved for depth charges and rails
40 tons reserved for mines and growth