Originally posted by Red Admiral
The turrets weigh the same on the ship its just that SS accounts for the weights differently with portions being in armament, armour and equipment sections.
Well, the French have been building single turrets for their 42cm Russian guns for years (starting Q4/1929) at 400 tons per turret. A quick run through SS shows this as a possible base for that number:
42cm coastal, France shore battery laid down 1929
Displacement:
-314 t light; 0 t standard; 0 t normal; 0 t full load
Dimensions: Length overall / water x beam x draught
0.00 ft / 0.00 ft x 0.00 ft x 0.00 ft (normal load)
0.00 m / 0.00 m x 0.00 m x 0.00 m
Armament:
1 - 16.54" / 420 mm guns in single mounts, 2,260.56lbs / 1,025.37kg shells, 1929 Model
Breech loading gun in a turret (on a barbette)
on centreline forward
Weight of broadside 2,261 lbs / 1,025 kg
Shells per gun, main battery: 250
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 4.72" / 120 mm 9.45" / 240 mm
Machinery:
Immobile floating battery
Complement:
0 - 0
Cost:
£0.905 million / $3.622 million
Distribution of weights at normal displacement:
Armament: 283 tons, 0.0 %
Armour: 117 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 117 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 0 tons, 0.0 %
Hull, fittings & equipment: -713 tons, 0.0 %
Fuel, ammunition & stores: 314 tons, 0.0 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
0 lbs / 0 Kg = 0.0 x 16.5 " / 420 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): NaN
Metacentric height NaN ft / NaN m
Roll period: NaN seconds
Steadiness - As gun platform (Average = 50 %): NaN %
- Recoil effect (Restricted arc if above 1.00): NaN
Seaboat quality (Average = 1.00): NaN
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 0.00 : 1
'Natural speed' for length: 0.00 kts
Power going to wave formation at top speed: 0 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): Infinity
- Above water (accommodation/working, high = better): NaN
Waterplane Area: 0 Square feet or 0 Square metres
Displacement factor (Displacement / loading): 0 %
Structure weight / hull surface area: -Infinity lbs/sq ft or -Infinity Kg/sq metre
Hull strength (Relative):
- Cross-sectional: NaN
- Longitudinal: NaN
- Overall: NaN
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is extremely poor
Now, one thing that doesn't fit is that the French were also paying for the guns separately to the Russians, at 135t per gun. Hmmmm. So, perhaps the SS number for turret weight should be added to the gun weight?