Well this has raised some interesting questions.
First- to what extent am I obliged to follow my predecessor's announced plans and general approach? I was trying to implement what had been announced to date, while looking for ideas of alternate variations -like the 36cm guns. This is further complicated in that all this occurs in what is now 'backstory' of 1928-1930 as I try to bring the Netherlands up to date. RAM set the next elections for 1931, so the govenment and policies should be the same.
So to date I've built the Z53s, O-1, K17s, started carriers (admittedly modified) and rebuilt the Z25s mostly as previously announced.
From my reading of RAM's threads, he announced a reconstruction of the Zeven Provincen, only to run afoul of the no caliber upgrade issue. He then fought for, and won that point in the revised Clieto treaty of Q4/29 (don't have everything memorized yet
? As indicated, he had planned to call the Zeven Provincen home in mid1929 for the rebuild. They come home Q2, the govt argues for and wins the gun clause in Q4, and then in Q1 1930 the very same govt decides to scrap the idea? I know they are politicians, but....
So.. my presumption is I am bound to do something regarding rebuilding the Zeven Provincen. Am I off base?.
Second: The viability of the design- after folks brought this up, I went and looked at the Indian, Philippine and Japanese designs for comparison. The public IJN designs are formidable, with top speed of 28kts. The Indian vessels also are in that range. Only IJN Okayama sports more than 36cm, with the Indian at 35cm. RAM’s proposed rebuild results in a ship lighter armed, comparably armored and 2.4 knots faster than the esteemed vessels of the SATSUMA alliance.
Third : I liked the suggestion of 36cm guns. I tried two versions. First is a simple reconstruction, the second is with bulges fitted.
===============36cm/29.5kt RAM===============
Zeven Provincien, Dutch Battlecruiser laid down 1915 (Engine 1930)
Displacement:
26,443 t light; 27,620 t standard; 29,394 t normal; 30,813 t full load
Dimensions: Length overall / water x beam x draught
704.26 ft / 688.98 ft x 90.22 ft x 29.04 ft (normal load)
214.66 m / 210.00 m x 27.50 m x 8.85 m
Armament:
6 - 14.17" / 360 mm guns (3x2 guns), 1,565.28lbs / 710.00kg shells, 1919 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 3.94" / 100 mm guns (8x2 guns), 30.51lbs / 13.84kg shells, 1926 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 4 raised mounts - superfiring
24 - 1.57" / 40.0 mm guns (4x6 guns), 1.95lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1915 Model
Quick firing guns in deck mounts
on side, evenly spread, 5 raised mounts
Weight of broadside 9,931 lbs / 4,505 kg
Shells per gun, main battery: 105
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: Unarmoured
Main Belt covers 95 % of normal length
- Torpedo Bulkhead:
1.57" / 40 mm 447.83 ft / 136.50 m 27.13 ft / 8.27 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.6" / 395 mm 7.87" / 200 mm 9.84" / 250 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
3rd: 0.47" / 12 mm - -
4th: 0.04" / 1 mm - -
- Armour deck: 5.31" / 135 mm, Conning tower: 3.35" / 85 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 119,256 shp / 88,965 Kw = 29.50 kts
Range 11,500nm at 12.00 kts
Bunker at max displacement = 3,194 tons
Complement:
1,122 - 1,459
Cost:
£3.469 million / $13.876 million
Distribution of weights at normal displacement:
Armament: 1,135 tons, 3.9 %
Armour: 11,074 tons, 37.7 %
- Belts: 4,291 tons, 14.6 %
- Torpedo bulkhead: 708 tons, 2.4 %
- Armament: 1,660 tons, 5.6 %
- Armour Deck: 4,346 tons, 14.8 %
- Conning Tower: 69 tons, 0.2 %
Machinery: 3,614 tons, 12.3 %
Hull, fittings & equipment: 10,495 tons, 35.7 %
Fuel, ammunition & stores: 2,951 tons, 10.0 %
Miscellaneous weights: 125 tons, 0.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
40,266 lbs / 18,265 Kg = 28.3 x 14.2 " / 360 mm shells or 6.2 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 5.7 ft / 1.7 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.00
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.570
Length to Beam Ratio: 7.64 : 1
'Natural speed' for length: 26.25 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 5.91 ft / 1.80 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.87 ft / 8.80 m
- Forecastle (20 %): 24.28 ft / 7.40 m (18.18 ft / 5.54 m aft of break)
- Mid (50 %): 18.18 ft / 5.54 m
- Quarterdeck (15 %): 18.18 ft / 5.54 m
- Stern: 18.18 ft / 5.54 m
- Average freeboard: 19.76 ft / 6.02 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.2 %
- Above water (accommodation/working, high = better): 136.4 %
Waterplane Area: 44,204 Square feet or 4,107 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 167 lbs/sq ft or 815 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.26
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
=======================+1.25m bulge, DeRutyer’s belt, 36cm, ================
Zeven Provincien, Dutch Battlecruiser laid down 1915 (Engine 1930)
Displacement:
27,326 t light; 28,684 t standard; 30,997 t normal; 32,848 t full load
Dimensions: Length overall / water x beam x draught
704.26 ft / 688.98 ft x 90.22 ft (Bulges 95.14 ft) x 29.04 ft (normal load)
214.66 m / 210.00 m x 27.50 m (Bulges 29.00 m) x 8.85 m
Armament:
6 - 14.17" / 360 mm guns (4 mounts), 1,565.28lbs / 710.00kg shells, 1930 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, 2 raised mounts
Aft Main mounts separated by engine room
16 - 4.92" / 125 mm guns (8x2 guns), 59.59lbs / 27.03kg shells, 1915 Model
Quick firing guns in deck mounts with hoists
on side ends, evenly spread, 4 raised mounts - superfiring
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.88kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 2 raised mounts
20 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 10 raised mounts
Weight of broadside 10,397 lbs / 4,716 kg
Shells per gun, main battery: 125
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.0" / 380 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: Unarmoured
Main Belt covers 95 % of normal length
- Torpedo Bulkhead and Bulges:
1.57" / 40 mm 447.83 ft / 136.50 m 27.13 ft / 8.27 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.7" / 425 mm 7.87" / 200 mm 11.8" / 300 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 0.98" / 25 mm
3rd: 0.47" / 12 mm - -
4th: 0.04" / 1 mm - -
- Armour deck: 5.31" / 135 mm, Conning tower: 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 116,065 shp / 86,584 Kw = 29.00 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 4,164 tons
Complement:
1,167 - 1,518
Cost:
£3.565 million / $14.261 million
Distribution of weights at normal displacement:
Armament: 1,193 tons, 3.8 %
Armour: 11,811 tons, 38.1 %
- Belts: 4,529 tons, 14.6 %
- Torpedo bulkhead: 708 tons, 2.3 %
- Armament: 2,186 tons, 7.1 %
- Armour Deck: 4,346 tons, 14.0 %
- Conning Tower: 42 tons, 0.1 %
Machinery: 3,517 tons, 11.3 %
Hull, fittings & equipment: 10,729 tons, 34.6 %
Fuel, ammunition & stores: 3,671 tons, 11.8 %
Miscellaneous weights: 75 tons, 0.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,465 lbs / 19,716 Kg = 30.5 x 14.2 " / 360 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 5.8 ft / 1.8 m
Roll period: 16.6 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.570
Length to Beam Ratio: 7.24 : 1
'Natural speed' for length: 26.25 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 5.91 ft / 1.80 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.87 ft / 8.80 m
- Forecastle (20 %): 26.18 ft / 7.98 m (18.18 ft / 5.54 m aft of break)
- Mid (50 %): 18.18 ft / 5.54 m
- Quarterdeck (15 %): 18.18 ft / 5.54 m
- Stern: 18.18 ft / 5.54 m
- Average freeboard: 19.99 ft / 6.09 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.5 %
- Above water (accommodation/working, high = better): 131.1 %
Waterplane Area: 44,204 Square feet or 4,107 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 168 lbs/sq ft or 820 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.23
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent