Well, during 1928 there will be the usual maneouvers involving the dutch fleet based in the Far East, this time with the intervention of the experimental carrier Hund. The carrier will prove as an excellent asset for reconnaissance and a decent one for strike roles. This will get the thinking heads of the Dutch Navy very interested in getting this kind of ships operative within the fleet.
So...CT says there is a top limit of 60000 tons for dutch CVs available. At the same time a CV smaller than 16000 tons is thought by the design bureaus as not worth the expense. This gives Netherlands two possible paths to follow:
a)
-3x20000 ton carriers of this type:
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Karel Doorman, Dutch Aircraft Carrier laid down 1930
Displacement:
19.748 t light; 20.474 t standard; 23.646 t normal; 26.184 t full load
Dimensions: Length overall / water x beam x draught
694,96 ft / 688,98 ft x 88,58 ft x 27,07 ft (normal load)
211,82 m / 210,00 m x 27,00 m x 8,25 m
Armament:
8 - 4,92" / 125 mm guns (4x2 guns), 59,59lbs / 27,03kg shells, 1930 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
10 - 4,92" / 125 mm guns (8 mounts), 59,59lbs / 27,03kg shells, 1930 Model
Dual purpose guns in deck mounts
on side, evenly spread
32 - 1,57" / 40,0 mm guns (8x4 guns), 1,95lbs / 0,88kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0,79" / 20,0 mm guns (8x2 guns), 0,24lbs / 0,11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1.139 lbs / 517 kg
Shells per gun, main battery: 350
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5,12" / 130 mm 459,65 ft / 140,10 m 11,48 ft / 3,50 m
Ends: Unarmoured
Main Belt covers 103 % of normal length
- Torpedo Bulkhead:
1,57" / 40 mm 459,65 ft / 140,10 m 23,79 ft / 7,25 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,57" / 40 mm 0,79" / 20 mm -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -
4th: 0,79" / 20 mm - -
- Armour deck: 3,94" / 100 mm, Conning tower: 5,12" / 130 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 135.558 shp / 101.126 Kw = 31,75 kts
Range 15.000nm at 15,00 kts
Bunker at max displacement = 5.709 tons
Complement:
953 - 1.239
Cost:
£5,795 million / $23,182 million
Distribution of weights at normal displacement:
Armament: 142 tons, 0,6 %
Armour: 4.892 tons, 20,7 %
- Belts: 1.145 tons, 4,8 %
- Torpedo bulkhead: 637 tons, 2,7 %
- Armament: 55 tons, 0,2 %
- Armour Deck: 2.964 tons, 12,5 %
- Conning Tower: 91 tons, 0,4 %
Machinery: 4.108 tons, 17,4 %
Hull, fittings & equipment: 6.905 tons, 29,2 %
Fuel, ammunition & stores: 3.898 tons, 16,5 %
Miscellaneous weights: 3.700 tons, 15,6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
33.806 lbs / 15.334 Kg = 567,3 x 4,9 " / 125 mm shells or 4,9 torpedoes
Stability (Unstable if below 1.00): 1,20
Metacentric height 5,8 ft / 1,8 m
Roll period: 15,4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,04
Seaboat quality (Average = 1.00): 1,21
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,501
Length to Beam Ratio: 7,78 : 1
'Natural speed' for length: 26,25 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 7,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,98 ft / 6,70 m
- Forecastle (20 %): 21,98 ft / 6,70 m
- Mid (50 %): 21,98 ft / 6,70 m
- Quarterdeck (15 %): 21,98 ft / 6,70 m
- Stern: 21,98 ft / 6,70 m
- Average freeboard: 21,98 ft / 6,70 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102,6 %
- Above water (accommodation/working, high = better): 178,8 %
Waterplane Area: 40.701 Square feet or 3.781 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 116 lbs/sq ft or 567 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,97
- Longitudinal: 1,26
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Air wing: 60 planes in five squadrons of 12 planes each. Two squadrons of fighters, three of torpedo-bombers, plus capacity for 12 further planes, dissambled in parts.
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The other path is...
b)
2x22000 ton carriers of this type:
-----------------------------------------------------------------------
Karel Doorman, Dutch Aircraft Carrier laid down 1930
Displacement:
21.590 t light; 22.363 t standard; 25.939 t normal; 28.799 t full load
Dimensions: Length overall / water x beam x draught
711,28 ft / 705,38 ft x 88,58 ft x 27,89 ft (normal load)
216,80 m / 215,00 m x 27,00 m x 8,50 m
Armament:
8 - 4,92" / 125 mm guns (4x2 guns), 59,59lbs / 27,03kg shells, 1930 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
10 - 4,92" / 125 mm guns (8 mounts), 59,59lbs / 27,03kg shells, 1930 Model
Dual purpose guns in deck mounts
on side, evenly spread
32 - 1,57" / 40,0 mm guns (8x4 guns), 1,95lbs / 0,88kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0,79" / 20,0 mm guns (8x2 guns), 0,24lbs / 0,11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1.139 lbs / 517 kg
Shells per gun, main battery: 350
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5,12" / 130 mm 459,32 ft / 140,00 m 11,48 ft / 3,50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Torpedo Bulkhead:
1,57" / 40 mm 459,32 ft / 140,00 m 23,79 ft / 7,25 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,57" / 40 mm 0,79" / 20 mm -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -
4th: 0,79" / 20 mm - -
- Armour deck: 3,94" / 100 mm, Conning tower: 5,12" / 130 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 129.903 shp / 96.908 Kw = 31,00 kts
Range 16.000nm at 15,00 kts
Bunker at max displacement = 6.436 tons
Complement:
1.021 - 1.328
Cost:
£5,965 million / $23,859 million
Distribution of weights at normal displacement:
Armament: 142 tons, 0,5 %
Armour: 5.028 tons, 19,4 %
- Belts: 1.148 tons, 4,4 %
- Torpedo bulkhead: 637 tons, 2,5 %
- Armament: 55 tons, 0,2 %
- Armour Deck: 3.091 tons, 11,9 %
- Conning Tower: 97 tons, 0,4 %
Machinery: 3.936 tons, 15,2 %
Hull, fittings & equipment: 7.184 tons, 27,7 %
Fuel, ammunition & stores: 4.348 tons, 16,8 %
Miscellaneous weights: 5.300 tons, 20,4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35.547 lbs / 16.124 Kg = 596,5 x 4,9 " / 125 mm shells or 5,2 torpedoes
Stability (Unstable if below 1.00): 1,13
Metacentric height 5,2 ft / 1,6 m
Roll period: 16,2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,04
Seaboat quality (Average = 1.00): 1,22
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,521
Length to Beam Ratio: 7,96 : 1
'Natural speed' for length: 26,56 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 7,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,33 ft / 6,50 m
- Forecastle (20 %): 21,33 ft / 6,50 m
- Mid (50 %): 21,33 ft / 6,50 m
- Quarterdeck (15 %): 21,33 ft / 6,50 m
- Stern: 21,33 ft / 6,50 m
- Average freeboard: 21,33 ft / 6,50 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99,6 %
- Above water (accommodation/working, high = better): 168,9 %
Waterplane Area: 42.443 Square feet or 3.943 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 116 lbs/sq ft or 567 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 1,14
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Air wing: 72 planes in six squadrons of 12 planes each. Two squadrons of fighters, four of torpedo-bombers, plus capacity for 12 further planes, dissambled in parts.
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and 1x16000 carrier of this type:
-----------------------------------------------------------------------------
Small Karel Doorman, Dutch Aircraft Carrier laid down 1931
Displacement:
15.665 t light; 16.301 t standard; 19.156 t normal; 21.440 t full load
Dimensions: Length overall / water x beam x draught
678,11 ft / 672,57 ft x 82,02 ft x 25,43 ft (normal load)
206,69 m / 205,00 m x 25,00 m x 7,75 m
Armament:
8 - 4,92" / 125 mm guns (4x2 guns), 59,59lbs / 27,03kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 2 raised mounts - superfiring
10 - 4,92" / 125 mm guns (8 mounts), 59,59lbs / 27,03kg shells, 1931 Model
Dual purpose guns in deck mounts
on side, evenly spread
32 - 1,57" / 40,0 mm guns (8x4 guns), 1,95lbs / 0,88kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0,79" / 20,0 mm guns (8x2 guns), 0,24lbs / 0,11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1.139 lbs / 517 kg
Shells per gun, main battery: 350
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5,12" / 130 mm 423,23 ft / 129,00 m 11,48 ft / 3,50 m
Ends: Unarmoured
Main Belt covers 97 % of normal length
- Torpedo Bulkhead:
1,57" / 40 mm 423,23 ft / 129,00 m 23,79 ft / 7,25 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,57" / 40 mm 0,79" / 20 mm -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -
4th: 0,79" / 20 mm - -
- Armour deck: 3,94" / 100 mm, Conning tower: 5,12" / 130 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 100.493 shp / 74.968 Kw = 30,50 kts
Range 15.500nm at 15,00 kts
Bunker at max displacement = 5.139 tons
Complement:
813 - 1.058
Cost:
£4,750 million / $19,001 million
Distribution of weights at normal displacement:
Armament: 142 tons, 0,7 %
Armour: 4.404 tons, 23,0 %
- Belts: 1.059 tons, 5,5 %
- Torpedo bulkhead: 587 tons, 3,1 %
- Armament: 55 tons, 0,3 %
- Armour Deck: 2.625 tons, 13,7 %
- Conning Tower: 79 tons, 0,4 %
Machinery: 3.005 tons, 15,7 %
Hull, fittings & equipment: 5.613 tons, 29,3 %
Fuel, ammunition & stores: 3.492 tons, 18,2 %
Miscellaneous weights: 2.500 tons, 13,1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29.230 lbs / 13.258 Kg = 490,5 x 4,9 " / 125 mm shells or 4,7 torpedoes
Stability (Unstable if below 1.00): 1,24
Metacentric height 5,5 ft / 1,7 m
Roll period: 14,7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,05
Seaboat quality (Average = 1.00): 1,20
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,478
Length to Beam Ratio: 8,20 : 1
'Natural speed' for length: 25,93 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 7,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18,37 ft / 5,60 m
- Forecastle (20 %): 18,37 ft / 5,60 m
- Mid (50 %): 18,37 ft / 5,60 m
- Quarterdeck (15 %): 18,37 ft / 5,60 m
- Stern: 18,37 ft / 5,60 m
- Average freeboard: 18,37 ft / 5,60 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95,9 %
- Above water (accommodation/working, high = better): 155,1 %
Waterplane Area: 36.037 Square feet or 3.348 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 108 lbs/sq ft or 528 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,00
- Longitudinal: 1,05
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Air wing: 48 planes in four squadrons of 12 planes each. One squadron of fighters, three of torpedo-bombers, plus capacity for 12 further planes, dissambled in parts.
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Option a) gives the naval air corps capability to take 180 planes to the sea, plus 36 dissambled and ready to make any losses good.
Option b) gives the naval air corps capability to take 192 planes to the sea, plus 36 dissambled and ready to make any losses good, but at the cost of one lesser-capable ship.
I'm stuck and can't decide between those two options so I would like to hear thoughts for and against each option...