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HSwMS Riksnyckeln, 1938 Battleship
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Author:  Psilander [ April 5th, 2023, 9:43 pm ]
Post subject:  HSwMS Riksnyckeln, 1938 Battleship

A planned batch of four battleships to reinforce the swedish east asia squadron against japanese threat. Instead of the class of smaller coastal battleships.
Quote:
Riksnyckeln, Sweden Battleship laid down 1938

Displacement:
31 333 t light; 33 972 t standard; 35 491 t normal; 36 705 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(669.94 ft / 656.17 ft) x 104.99 ft x (26.25 / 27.01 ft)
(204.20 m / 200.00 m) x 32.00 m x (8.00 / 8.23 m)

Armament:
7 - 16.54" / 420 mm 45.0 cal guns - 2 279.83lbs / 1 034.12kg shells, 200 per gun
Breech loading guns in turret on barbette mounts, 1938 Model
1 x Triple mount on centreline, forward deck centre
2 x Twin mounts on centreline, aft evenly spread
1 raised mount aft
16 - 4.72" / 120 mm 45.0 cal guns - 53.17lbs / 24.12kg shells, 300 per gun
Dual purpose guns in turret on barbette mounts, 1938 Model
8 x Twin mounts on sides, evenly spread
4 raised mounts
24 - 1.57" / 40.0 mm 60.0 cal guns - 2.14lbs / 0.97kg shells, 500 per gun
Anti-air guns in deck mounts, 1936 Model
8 x Twin mounts on sides, evenly spread
8 raised mounts
4 x Twin mounts on centreline, evenly spread
4 double raised mounts
20 - 0.79" / 20.0 mm 45.0 cal guns - 0.25lbs / 0.11kg shells, 150 per gun
Machine guns in deck mounts, 1938 Model
6 x Twin mounts on sides, evenly spread
4 raised mounts
4 x Twin mounts on sides, evenly spread
4 double raised mounts
Weight of broadside 16 866 lbs / 7 650 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.0" / 380 mm 442.91 ft / 135.00 m 11.91 ft / 3.63 m
Ends: 0.98" / 25 mm 213.25 ft / 65.00 m 11.91 ft / 3.63 m
Upper: 0.98" / 25 mm 426.51 ft / 130.00 m 8.01 ft / 2.44 m
Main Belt covers 104 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
0.98" / 25 mm 426.51 ft / 130.00 m 23.69 ft / 7.22 m
Beam between torpedo bulkheads 65.62 ft / 20.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.87" / 200 mm 13.8" / 350 mm
2nd: 3.35" / 85 mm 0.98" / 25 mm 3.35" / 85 mm
3rd: 0.20" / 5 mm 0.20" / 5 mm -

- Armoured deck - multiple decks:
For and Aft decks: 4.92" / 125 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 15.75" / 400 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 82 954 shp / 61 884 Kw = 26.00 kts
Range 6 000nm at 14.00 kts
Bunker at max displacement = 2 733 tons

Complement:
1 292 - 1 680

Cost:
£16.842 million / $67.369 million

Distribution of weights at normal displacement:
Armament: 2 782 tons, 7.8 %
- Guns: 2 782 tons, 7.8 %
Armour: 12 145 tons, 34.2 %
- Belts: 3 723 tons, 10.5 %
- Torpedo bulkhead: 368 tons, 1.0 %
- Armament: 3 329 tons, 9.4 %
- Armour Deck: 4 359 tons, 12.3 %
- Conning Tower: 366 tons, 1.0 %
Machinery: 2 271 tons, 6.4 %
Hull, fittings & equipment: 13 885 tons, 39.1 %
Fuel, ammunition & stores: 4 158 tons, 11.7 %
Miscellaneous weights: 250 tons, 0.7 %
- Hull below water: 50 tons
- Hull above water: 100 tons
- On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
62 183 lbs / 28 206 Kg = 27.5 x 16.5 " / 420 mm shells or 8.9 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 8.0 ft / 2.5 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.58
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has a flush deck,
an extended bulbous bow and small transom stern
Block coefficient (normal/deep): 0.687 / 0.691
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 27.78 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.53 ft / 9.00 m, 26.25 ft / 8.00 m
- Forward deck: 30.00 %, 26.25 ft / 8.00 m, 22.97 ft / 7.00 m
- Aft deck: 35.00 %, 22.97 ft / 7.00 m, 19.69 ft / 6.00 m
- Quarter deck: 15.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Average freeboard: 23.31 ft / 7.11 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.6 %
- Above water (accommodation/working, high = better): 188.6 %
Waterplane Area: 56 018 Square feet or 5 204 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 203 lbs/sq ft or 991 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

4x ships planned Riksnyckeln, Kronan, Svärdet and Äpplet (Key to Relm, the Crown, the Sword, & the Orb)
2x floatplands SAAB S17BL

Author:  arcticman123 [ April 6th, 2023, 7:08 pm ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

Is it still under work? There is no picture.

Author:  Psilander [ April 6th, 2023, 9:15 pm ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

arcticman123 wrote: *
Is it still under work? There is no picture.
Yes. I wamt to discuss her characteristics before I start drawing.

Second calculation, with lower aft deck, gun layout like cruiser Tre Kronor.
Quote:
Riksnyckeln,
(Kronan. Äpplet, Svärdet)
Sweden Battleship laid down 1938

Displacement:
30 662 t light; 33 302 t standard; 35 491 t normal; 37 242 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(669.94 ft / 656.17 ft) x 104.99 ft x (26.25 / 27.34 ft)
(204.20 m / 200.00 m) x 32.00 m x (8.00 / 8.33 m)

Armament:
7 - 16.54" / 420 mm 45.0 cal guns - 2 279.83lbs / 1 034.12kg shells, 200 per gun
Breech loading guns in turret on barbette mounts, 1938 Model
1 x Triple mount on centreline, forward deck forward
2 x Twin mounts on centreline, aft evenly spread
1 raised mount aft
16 - 4.72" / 120 mm 45.0 cal guns - 53.17lbs / 24.12kg shells, 300 per gun
Dual purpose guns in turret on barbette mounts, 1938 Model
8 x Twin mounts on sides, evenly spread
4 raised mounts
24 - 1.57" / 40.0 mm 60.0 cal guns - 2.14lbs / 0.97kg shells, 500 per gun
Anti-air guns in deck mounts, 1936 Model
8 x Twin mounts on sides, evenly spread
8 raised mounts
4 x Twin mounts on centreline, evenly spread
4 double raised mounts
20 - 0.79" / 20.0 mm 45.0 cal guns - 0.25lbs / 0.11kg shells, 150 per gun
Machine guns in deck mounts, 1938 Model
6 x Twin mounts on sides, evenly spread
4 raised mounts
4 x Twin mounts on sides, evenly spread
4 double raised mounts
Weight of broadside 16 866 lbs / 7 650 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.0" / 380 mm 442.91 ft / 135.00 m 11.91 ft / 3.63 m
Ends: 0.98" / 25 mm 213.25 ft / 65.00 m 11.91 ft / 3.63 m
Upper: 0.98" / 25 mm 426.51 ft / 130.00 m 8.01 ft / 2.44 m
Main Belt covers 104 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
0.98" / 25 mm 426.51 ft / 130.00 m 23.69 ft / 7.22 m
Beam between torpedo bulkheads 65.62 ft / 20.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.87" / 200 mm 13.8" / 350 mm
2nd: 3.35" / 85 mm 0.98" / 25 mm 3.35" / 85 mm
3rd: 0.20" / 5 mm 0.20" / 5 mm -

- Armoured deck - multiple decks:
For and Aft decks: 4.92" / 125 mm
Forecastle: 0.98" / 25 mm Quarter deck: 0.98" / 25 mm

- Conning towers: Forward 15.75" / 400 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 82 954 shp / 61 884 Kw = 26.00 kts
Range 9 000nm at 14.00 kts
Bunker at max displacement = 3 940 tons

Complement:
1 292 - 1 680

Cost:
£16.710 million / $66.840 million

Distribution of weights at normal displacement:
Armament: 2 782 tons, 7.8 %
- Guns: 2 782 tons, 7.8 %
Armour: 11 790 tons, 33.2 %
- Belts: 3 723 tons, 10.5 %
- Torpedo bulkhead: 368 tons, 1.0 %
- Armament: 2 854 tons, 8.0 %
- Armour Deck: 4 478 tons, 12.6 %
- Conning Tower: 366 tons, 1.0 %
Machinery: 2 271 tons, 6.4 %
Hull, fittings & equipment: 13 569 tons, 38.2 %
Fuel, ammunition & stores: 4 828 tons, 13.6 %
Miscellaneous weights: 250 tons, 0.7 %
- Hull below water: 50 tons
- Hull above water: 100 tons
- On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
59 175 lbs / 26 842 Kg = 26.2 x 16.5 " / 420 mm shells or 8.6 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 7.7 ft / 2.3 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.60
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak,
an extended bulbous bow and small transom stern
Block coefficient (normal/deep): 0.687 / 0.692
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 27.78 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 29.53 ft / 9.00 m, 26.25 ft / 8.00 m
- Forward deck: 50.00 %, 26.25 ft / 8.00 m, 22.97 ft / 7.00 m
- Aft deck: 20.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 21.03 ft / 6.41 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.6 %
- Above water (accommodation/working, high = better): 176.1 %
Waterplane Area: 56 018 Square feet or 5 204 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 202 lbs/sq ft or 988 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

4x ships planned Riksnyckeln, Kronan, Svärdet and Äpplet (Key to Relm, the Crown, the Sword, & the Orb)
2x floatplanes SAAB S17BL

Author:  Psilander [ April 7th, 2023, 10:02 pm ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

First sketch

[ img ]

Author:  arcticman123 [ April 22nd, 2023, 10:50 am ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

200 rounds per every 42cm gun sound a lot. Hod does it all fit?

Author:  bugsier_060 [ April 23rd, 2023, 9:54 am ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

the turrets look similar to british design, to be more precise, they look a lot like Lion's/KGV's turrets. They are also too small/light for 42cm turrets, in my opinion. The guns itself should be widened by 1 pixel.

Author:  Psilander [ April 24th, 2023, 10:00 pm ]
Post subject:  Re: HSwMS Riksnyckeln, 1938 Battleship

Yes, they are RN guns. They are just for arrengenig the ships arnament

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