Urban Designs

[Urban]

Ok, second attempt at a destroyer- now with hoists! Compared to it's predecessor it has a big increase in tonnage and has lost the turret amidships- the 4 remaining guns should however have a quicker and more sustainable rate of fire over long periods. Bit swifter overall & slightly longer ranged, increased torpedo and AA armament and has extra utility in the form of hydrophones and depth charges, making a more well rounded fleet escort destroyer I think? Downsides include no longer fitting neatly into a 100m dock and just generally being a much bigger and expensive beast, and probably some others I haven't noticed!


DD20-1,  Destroyer laid down 1920

Displacement:
   1,437 t light; 1,511 t standard; 1,700 t normal; 1,852 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (380.00 ft / 377.00 ft) x 31.00 ft x (12.50 / 13.23 ft)
   (115.82 m / 114.91 m) x 9.45 m  x (3.81 / 4.03 m)

Armament:
      4 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 220 per gun
     Quick firing guns in deck and hoist mounts, 1920 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      3 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 400 per gun
     Breech loading guns in deck mounts, 1920 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount - superfiring
     2 x Single mounts on sides, forward deck centre
      Weight of broadside 293 lbs / 133 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.45" / 11 mm         -               -
   2nd:   0.39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 32,277 shp / 24,079 Kw = 32.10 kts
   Range 4,400nm at 14.00 kts
   Bunker at max displacement = 341 tons

Complement:
   132 - 172

Cost:
   £0.463 million / $1.851 million

Distribution of weights at normal displacement:
   Armament: 75 tons, 4.4 %
      - Guns: 75 tons, 4.4 %
   Armour: 7 tons, 0.4 %
      - Armament: 7 tons, 0.4 %
   Machinery: 853 tons, 50.2 %
   Hull, fittings & equipment: 416 tons, 24.5 %
   Fuel, ammunition & stores: 263 tons, 15.5 %
   Miscellaneous weights: 86 tons, 5.1 %
      - Hull below water: 15 tons
      - On freeboard deck: 38 tons
      - Above deck: 33 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     350 lbs / 159 Kg = 5.6 x 5.0 " / 127 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 13.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.78
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.407 / 0.419
   Length to Beam Ratio: 12.16 : 1
   'Natural speed' for length: 19.42 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 3.00 ft / 0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  18.00 ft / 5.49 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Aft deck:   25.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Quarter deck:   15.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Average freeboard:      12.92 ft / 3.94 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 178.1 %
      - Above water (accommodation/working, high = better): 114.7 %
   Waterplane Area: 7,225 Square feet or 671 Square metres
   Displacement factor (Displacement / loading): 65 %
   Structure weight / hull surface area: 32 lbs/sq ft or 156 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.18
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc weights:
-- Above deck
---- 8t Fire control system (1918)
---- 0t Short range wireless set (100m)
---- 25t Long range wireless set (250+)
-- On deck
---- 32t - 8 (2x4) 21" torpedoes mounted on the centreline (no reloads, 4t torps)
---- 6t - 30 x 195kg depth charges
-- Hull below water
---- 15t Enhanced hydrophone package, hull mounted blister array

Trial speed: 33kts

[Jefgte]

Length to Beam Ratio: 12.16 : 1

12:1 max

Ship has slow, easy roll, a good, steady gun platform

Excellent

;)

[The Rock Doctor]

Pretty sturdy.  Are the 3" guns intended to be anti-surface or AA?

[TacCovert4]

Yeah, not bad.   

The hoist vs no hoist debate is basically never ending for the 4in through 5in guns prior to the 30s.   I've mostly gone without on destroyers and cruiser secondary guns, favoring more mounts instead.   But then I don't necessarily expect destroyers in the sort of knife fighting that defines the Caribbean to survive much longer than their ready racks without a break in the action to refill them.   And my cruisers I expect to be set upon in a close and fast action,  again where it's likely over in minutes and having those extra guns to pour out fire Short term is vital to surviving. 

[The Rock Doctor]

I've gone with hoists for anything over 100mm in this iteration of the sim.   

[TacCovert4]

Really makes sense for you, the Union is a top shelf technology and industrial power. 

I've sort of aimed 'cheap and cheerful' in a lot of ways because the Sultanate is supposed to be a struggling up-and-coming power.

Hence 5in singles and everything below them (except the new 30mm AA guns ironically) are plain deck mounts.  And the 180mm twin mount is a mount and hoist rather than a turret, sort of the ragged edge of what can be done with that arrangement.

[Urban]

Yeah, I have it easier currently in that I can spit out designs that don't have to really fit into any exacting operational requirements or what have you, it's interesting to see the different thought processes that come about from each nation's unique situation though!

Amended the DD design, fixed the length to beam ratio and made the secondary guns into AA guns (as was originally intended, but missed by me!) - I've reduced the calibre of the AA guns down to 40mm but made the centreline AA mount into a twin instead of a single.


DD20-1,  Destroyer laid down 1920

Displacement:
   1,433 t light; 1,503 t standard; 1,700 t normal; 1,858 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (375.00 ft / 372.00 ft) x 31.00 ft x (12.50 / 13.27 ft)
   (114.30 m / 113.39 m) x 9.45 m  x (3.81 / 4.05 m)

Armament:
      4 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 220 per gun
     Quick firing guns in deck and hoist mounts, 1920 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 1.57" / 40.0 mm 65.0 cal guns - 2.17lbs / 0.98kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1920 Model
     1 x Twin mount on centreline, aft deck forward
      1 raised mount - superfiring
     2 x Single mounts on sides, forward deck centre
      Weight of broadside 261 lbs / 118 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.45" / 11 mm         -               -
   2nd:   0.39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 32,656 shp / 24,361 Kw = 32.10 kts
   Range 4,600nm at 14.00 kts
   Bunker at max displacement = 355 tons

Complement:
   132 - 172

Cost:
   £0.462 million / $1.847 million

Distribution of weights at normal displacement:
   Armament: 71 tons, 4.2 %
      - Guns: 71 tons, 4.2 %
   Armour: 6 tons, 0.3 %
      - Armament: 6 tons, 0.3 %
   Machinery: 860 tons, 50.6 %
   Hull, fittings & equipment: 410 tons, 24.1 %
   Fuel, ammunition & stores: 267 tons, 15.7 %
   Miscellaneous weights: 86 tons, 5.1 %
      - Hull below water: 15 tons
      - On freeboard deck: 38 tons
      - Above deck: 33 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     348 lbs / 158 Kg = 5.6 x 5.0 " / 127 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.413 / 0.425
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 19.29 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 3.00 ft / 0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  18.00 ft / 5.49 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Aft deck:   25.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Quarter deck:   15.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Average freeboard:      12.92 ft / 3.94 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 178.6 %
      - Above water (accommodation/working, high = better): 113.6 %
   Waterplane Area: 7,154 Square feet or 665 Square metres
   Displacement factor (Displacement / loading): 65 %
   Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.20
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc weights:
-- Above deck
---- 8t Fire control system (1918)
---- 0t Short range wireless set (100m)
---- 25t Long range wireless set (250+)
-- On deck
---- 32t - 8 (2x4) 21" torpedoes mounted on the centreline (no reloads, 4t torps)
---- 6t - 30 x 195kg depth charges
-- Hull below water
---- 15t Enhanced hydrophone package, hull mounted blister array

Trial speed: 33kts

[Urban]

Relatively quick and easy one today, working my way up through cruisers. A minelaying cruiser- big enough guns to deter or destroy lighter craft, and enough speed to hopefully avoid heavier contact... Possibly has some utility as a raider too.


MLC01-15,  Minelayer Cruiser laid down 1915

Displacement:
   3,878 t light; 4,001 t standard; 4,500 t normal; 4,900 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (450.00 ft / 450.00 ft) x 42.00 ft x (20.00 / 21.19 ft)
   (137.16 m / 137.16 m) x 12.80 m  x (6.10 / 6.46 m)

Armament:
      4 - 5.50" / 140 mm 45.0 cal guns - 83.90lbs / 38.05kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1915 Model
     3 x Single mounts on centreline ends, majority aft
      1 raised mount aft - superfiring
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      2 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 300 per gun
     Anti-air guns in deck mounts, 1915 Model
     2 x Single mounts on centreline, aft evenly spread
      2 raised mounts
      Weight of broadside 363 lbs / 165 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.45" / 37 mm   362.00 ft / 110.34 m   12.00 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 124 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.39" / 61 mm   0.78" / 20 mm      2.00" / 51 mm
   2nd:   0.45" / 11 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.45" / 11 mm  Quarter deck: 0.45" / 11 mm

   - Conning towers: Forward 3.50" / 89 mm, Aft 1.00" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 37,223 shp / 27,769 Kw = 29.00 kts
   Range 5,400nm at 14.00 kts
   Bunker at max displacement = 899 tons

Complement:
   274 - 357

Cost:
   £0.533 million / $2.131 million

Distribution of weights at normal displacement:
   Armament: 95 tons, 2.1 %
      - Guns: 95 tons, 2.1 %
   Armour: 423 tons, 9.4 %
      - Belts: 248 tons, 5.5 %
      - Armament: 31 tons, 0.7 %
      - Armour Deck: 119 tons, 2.6 %
      - Conning Towers: 26 tons, 0.6 %
   Machinery: 1,410 tons, 31.3 %
   Hull, fittings & equipment: 1,595 tons, 35.4 %
   Fuel, ammunition & stores: 622 tons, 13.8 %
   Miscellaneous weights: 355 tons, 7.9 %
      - Hull below water: 20 tons
      - On freeboard deck: 300 tons
      - Above deck: 35 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,207 lbs / 1,908 Kg = 50.6 x 5.5 " / 140 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.04
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.43

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.417 / 0.428
   Length to Beam Ratio: 10.71 : 1
   'Natural speed' for length: 21.21 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 0.00 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 %,  21.00 ft / 6.40 m,  19.00 ft / 5.79 m
      - Forward deck:   20.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
      - Aft deck:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Quarter deck:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Average freeboard:      16.16 ft / 4.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109.3 %
      - Above water (accommodation/working, high = better): 130.8 %
   Waterplane Area: 11,756 Square feet or 1,092 Square metres
   Displacement factor (Displacement / loading): 115 %
   Structure weight / hull surface area: 71 lbs/sq ft or 349 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.19
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc weights:
-- Above deck
---- 10t Fire control system (1915)
---- 0t Short range wireless (100m)
---- 25t Long range wireless (250+)
-- On deck
---- 300t - 300 x mines & associated handling equipment
-- Hull below water
---- 20t additional pumps & damage control equipment