Middle Kingdom Design Studies for 1920

[snip]

As in made to engage enemy torpedo boats. My way of designating things might be a bit different. I guess my destroyers are sort of a hybrid of those roles, have the speed to hit capital units and (hopefuly) that will help there lack of gunpower if needed to engage TB's or MTB's. And besides,  a ultra-heavy (by my standards) torp loadout is sort of standard for the MK. Last batch of DD's had only 2 75mm guns and 9 21" torps.

[maddox]

The MK didn't have capital units to protect. So, why build ships to protect such units?

The heavy torpedo load-out was the fastest way the MK could build a fleet that was capable to destroy the NS heavy naval units and troop transports.

The MK developed ships the size of a destroyer still are torpedo boats.

[snip]

Point by point

The MK didn't have capital units to protect. So, why build ships to protect such units?

No reason. But now with capital units planed, protecting them needs to be look at. With escorts able to hit the water quicker, there is reason to debate the rolls they will fill.

The heavy torpedo load-out was the fastest way the MK could build a fleet that was capable to destroy the NS heavy naval units and troop transports.

Agreed. However, now is a completely different strategic scenario. Time is not as large a constraint, so a fleet-in-being concept is getting some looks (in case its not obvious, Im sort of a fan)

The MK developed ships the size of a destroyer still are torpedo boats.

(looks at the Javelin) 35.5 kts not quick (best im getting out of 1916 engines)? 8 torp tubes (arranged in 2 triple launchers amidships and 2 single tubes on the bow for head-on attacks) not a lot?

[snip]

A few more tweeks to some of the designs

Majestic

Xióngw?i (Majestic) Class, Middle Kingdom Cruiser laid down 1920 (Engine 1916)

Displacement:
   6,800 t light; 7,110 t standard; 8,554 t normal; 9,709 t full load

Dimensions: Length overall / water x beam x draught
   552.83 ft / 541.34 ft x 55.77 ft x 18.04 ft (normal load)
   168.50 m / 165.00 m x 17.00 m  x 5.50 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1920 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      6 - 2.95" / 75.0 mm guns (3x2 guns), 12.87lbs / 5.84kg shells, 1920 Model
     Quick firing guns in deck mounts
     on centreline, all aft, all raised mounts - superfiring
      2 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1920 Model
     Quick firing guns in deck mounts
     on side, all forward
      6 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1920 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      10 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1920 Model
     Machine guns in deck mounts
     on side, evenly spread, 4 raised mounts
   Weight of broadside 954 lbs / 433 kg
   Shells per gun, main battery: 250
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   377.30 ft / 115.00 m   8.96 ft / 2.73 m
   Ends:   Unarmoured
     Main Belt covers 107 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   2.95" / 75 mm      3.94" / 100 mm
   2nd:   0.59" / 15 mm   0.39" / 10 mm            -
   3rd:   0.59" / 15 mm   0.39" / 10 mm            -
   4th:   0.59" / 15 mm         -               -

   - Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 63,010 shp / 47,005 Kw = 30.00 kts
   Range 8,000nm at 16.00 kts
   Bunker at max displacement = 2,598 tons (15% coal)

Complement:
   444 - 578

Cost:
   £1.587 million / $6.348 million

Distribution of weights at normal displacement:
   Armament: 119 tons, 1.4 %
   Armour: 1,010 tons, 11.8 %
      - Belts: 550 tons, 6.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 124 tons, 1.4 %
      - Armour Deck: 307 tons, 3.6 %
      - Conning Tower: 28 tons, 0.3 %
   Machinery: 2,380 tons, 27.8 %
   Hull, fittings & equipment: 2,866 tons, 33.5 %
   Fuel, ammunition & stores: 1,754 tons, 20.5 %
   Miscellaneous weights: 425 tons, 5.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,535 lbs / 3,871 Kg = 82.9 x 5.9 " / 150 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.31
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 9.71 : 1
   'Natural speed' for length: 23.27 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 72
   Bow angle (Positive = bow angles forward): 30.00 degrees
   Stern overhang: 1.54 ft / 0.47 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.22 ft / 5.25 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   16.47 ft / 5.02 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.4 %
      - Above water (accommodation/working, high = better): 127.9 %
   Waterplane Area: 21,062 Square feet or 1,957 Square metres
   Displacement factor (Displacement / loading): 120 %
   Structure weight / hull surface area: 89 lbs/sq ft or 435 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.08
      - 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

Remembrance

Jìniàn (Remembrance) Class, Chinese Battleship laid down 1920 (Engine 1916)

Displacement:
   16,000 t light; 17,034 t standard; 18,551 t normal; 19,765 t full load

Dimensions: Length overall / water x beam x draught
   554.46 ft / 541.34 ft x 82.02 ft x 21.33 ft (normal load)
   169.00 m / 165.00 m x 25.00 m  x 6.50 m

Armament:
      8 - 12.01" / 305 mm guns (4x2 guns), 903.90lbs / 410.00kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns (6x2 guns), 46.30lbs / 21.00kg shells, 1915 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
      6 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      14 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1920 Model
     Machine guns in deck mounts
     on side, evenly spread, 6 raised mounts
   Weight of broadside 7,816 lbs / 3,545 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   351.87 ft / 107.25 m   10.86 ft / 3.31 m
   Ends:   Unarmoured
   Upper:   7.09" / 180 mm   351.87 ft / 107.25 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      2.36" / 60 mm   351.87 ft / 107.25 m   20.67 ft / 6.30 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   7.09" / 180 mm      9.84" / 250 mm
   2nd:   2.95" / 75 mm   0.98" / 25 mm      2.95" / 75 mm
   3rd:   0.59" / 15 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 7.87" / 200 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 27,781 shp / 20,725 Kw = 21.00 kts
   Range 6,000nm at 15.00 kts
   Bunker at max displacement = 2,731 tons

Complement:
   794 - 1,033

Cost:
   £3.549 million / $14.197 million

Distribution of weights at normal displacement:
   Armament: 948 tons, 5.1 %
   Armour: 6,577 tons, 35.5 %
      - Belts: 2,854 tons, 15.4 %
      - Torpedo bulkhead: 636 tons, 3.4 %
      - Armament: 1,689 tons, 9.1 %
      - Armour Deck: 1,280 tons, 6.9 %
      - Conning Tower: 119 tons, 0.6 %
   Machinery: 1,035 tons, 5.6 %
   Hull, fittings & equipment: 7,040 tons, 37.9 %
   Fuel, ammunition & stores: 2,551 tons, 13.8 %
   Miscellaneous weights: 400 tons, 2.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     30,185 lbs / 13,692 Kg = 34.9 x 12.0 " / 305 mm shells or 5.9 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 4.3 ft / 1.3 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.686
   Length to Beam Ratio: 6.60 : 1
   'Natural speed' for length: 23.27 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 30.00 degrees
   Stern overhang: 2.23 ft / 0.68 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.86 ft / 5.75 m
      - Forecastle (20 %):   18.04 ft / 5.50 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.04 ft / 5.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.5 %
      - Above water (accommodation/working, high = better): 141.5 %
   Waterplane Area: 35,136 Square feet or 3,264 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 152 lbs/sq ft or 743 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.25
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Searchlight

Tànzhàod?ng (Searchlight), Chinese Destroyer Leader/Scout Cruiser laid down 1920 (Engine 1916)

Displacement:
   4,000 t light; 4,145 t standard; 5,267 t normal; 6,165 t full load

Dimensions: Length overall / water x beam x draught
   501.96 ft / 492.13 ft x 47.57 ft x 14.76 ft (normal load)
   153.00 m / 150.00 m x 14.50 m  x 4.50 m

Armament:
      6 - 4.72" / 120 mm guns (3x2 guns), 46.30lbs / 21.00kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 1 raised mount aft - superfiring
      6 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships
      10 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread, 4 raised mounts
   Weight of broadside 305 lbs / 139 kg
   Shells per gun, main battery: 220
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.36" / 60 mm   383.86 ft / 117.00 m   8.14 ft / 2.48 m
   Ends:   Unarmoured
     Main Belt covers 120 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.36" / 60 mm   0.59" / 15 mm      2.36" / 60 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 41,693 shp / 31,103 Kw = 29.00 kts
   Range 7,500nm at 17.00 kts
   Bunker at max displacement = 2,020 tons

Complement:
   308 - 401

Cost:
   £0.930 million / $3.721 million

Distribution of weights at normal displacement:
   Armament: 43 tons, 0.8 %
   Armour: 322 tons, 6.1 %
      - Belts: 299 tons, 5.7 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 23 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,553 tons, 29.5 %
   Hull, fittings & equipment: 1,832 tons, 34.8 %
   Fuel, ammunition & stores: 1,267 tons, 24.0 %
   Miscellaneous weights: 250 tons, 4.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,637 lbs / 2,557 Kg = 106.9 x 4.7 " / 120 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.14
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.533
   Length to Beam Ratio: 10.34 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 71
   Bow angle (Positive = bow angles forward): 30.00 degrees
   Stern overhang: 1.31 ft / 0.40 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      14.76 ft / 4.50 m
      - Forecastle (20 %):   13.94 ft / 4.25 m
      - Mid (50 %):      13.94 ft / 4.25 m
      - Quarterdeck (15 %):   13.94 ft / 4.25 m
      - Stern:      13.94 ft / 4.25 m
      - Average freeboard:   14.01 ft / 4.27 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.7 %
      - Above water (accommodation/working, high = better): 114.2 %
   Waterplane Area: 16,086 Square feet or 1,494 Square metres
   Displacement factor (Displacement / loading): 131 %
   Structure weight / hull surface area: 75 lbs/sq ft or 366 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.05
      - Longitudinal: 0.98
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[snip]

A river monitor, for support of army troops

Emperess Longyu , Middle Kingdom Monitor laid down 1921

Displacement:
   600 t light; 663 t standard; 701 t normal; 731 t full load

Dimensions: Length overall / water x beam x draught
   180.45 ft / 180.45 ft x 31.17 ft x 6.56 ft (normal load)
   55.00 m / 55.00 m x 9.50 m  x 2.00 m

Armament:
      1 - 7.68" / 195 mm guns in single mounts, 226.24lbs / 102.62kg shells, 1902 Model
     Breech loading gun in a deck mount with hoist
     on centreline forward, 1 raised gun
      2 - 2.95" / 75.0 mm guns (1x2 guns), 14.33lbs / 6.50kg shells, 1915 Model
     Quick firing guns in deck mount
     on centreline aft
      4 - 1.97" / 50.0 mm guns (2 mounts), 3.81lbs / 1.73kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, 1 raised gun
      8 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1921 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 274 lbs / 124 kg
   Shells per gun, main battery: 300

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm   135.33 ft / 41.25 m   6.69 ft / 2.04 m
   Ends:   Unarmoured
     Main Belt covers 115 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.87" / 200 mm   4.72" / 120 mm      3.94" / 100 mm
   2nd:   0.98" / 25 mm         -               -

   - Armour deck: 0.28" / 7 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Electric motors, 1 shaft, 624 ihp / 466 Kw = 12.00 kts
   Range 1,000nm at 12.00 kts
   Bunker at max displacement = 68 tons (90% coal)

Complement:
   67 - 88

Cost:
   £0.140 million / $0.560 million

Distribution of weights at normal displacement:
   Armament: 34 tons, 4.8 %
   Armour: 102 tons, 14.5 %
      - Belts: 31 tons, 4.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 41 tons, 5.9 %
      - Armour Deck: 22 tons, 3.1 %
      - Conning Tower: 8 tons, 1.1 %
   Machinery: 40 tons, 5.7 %
   Hull, fittings & equipment: 325 tons, 46.3 %
   Fuel, ammunition & stores: 101 tons, 14.4 %
   Miscellaneous weights: 100 tons, 14.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,039 lbs / 471 Kg = 4.6 x 7.7 " / 195 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   Seaboat quality  (Average = 1.00): 1.34

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.665
   Length to Beam Ratio: 5.79 : 1
   'Natural speed' for length: 13.43 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   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:      10.66 ft / 3.25 m
      - Forecastle (20 %):   10.66 ft / 3.25 m (6.56 ft / 2.00 m aft of break)
      - Mid (50 %):      6.56 ft / 2.00 m
      - Quarterdeck (5 %):   6.56 ft / 2.00 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   7.38 ft / 2.25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.8 %
      - Above water (accommodation/working, high = better): 80.5 %
   Waterplane Area: 4,317 Square feet or 401 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 57 lbs/sq ft or 279 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 2.03
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc weight: 100t cruiser fire control

[Sachmle]

- Armour deck: 0.28" / 7 mm

And what were you planning on this stopping, spit balls?

[Guinness]

Well, it would stop some splinters...

I think that 195mm is just too big for such a role. Or is that supposed to be some larger caliber howitzer? A pair of 150mm guns might be a better use of the displacement (at least IMHO).

Also, I'm not sure FC is worth the trouble for a ship in this role. It'll be shooting it's main armament blind almost all the time. In those circumstances, it will be dependent on spotting from ashore most likely, and it's FC set will be of little use. I really don't think FC is necessary for shooting only at immobil land targets, especially from a flat-water riverine environment.

[mentat]

Nice little Gunboat

If the armour deck is simmed for thicker armour but just over the fwd Mag - it might make more sense - and fits with the substantial armour on the mount + hoist - otherwise yes the 7mm is very marginal - even against splinters/deflected machine gun fire

Agree - more lighter guns - with higher RoF might be more useful - maybe something like a twin 100mm Gun Mount up front for direct fire and a 150mm single howitzer astern for longer range/indirect fire

For FC - Forward Observation Party with portable radio/signalling equipment + small Marine detachment I think .....

[Jefgte]

I agree too,

With 2x150, you have certainly a higher ROF for the same boardside.


Jef

[snip]

2x150 works better

Emperess Longyu , Middle Kingdom Monitor laid down 1921

Displacement:
   500 t light; 554 t standard; 573 t normal; 588 t full load

Dimensions: Length overall / water x beam x draught
   180.45 ft / 180.45 ft x 31.17 ft x 6.56 ft (normal load)
   55.00 m / 55.00 m x 9.50 m  x 2.00 m

Armament:
      2 - 5.91" / 150 mm guns (1x2 guns), 99.21lbs / 45.00kg shells, 1902 Model
     Breech loading guns in a deck mount with hoist
     on centreline forward, all raised guns - superfiring
      1 - 2.95" / 75.0 mm guns in single mounts, 14.33lbs / 6.50kg shells, 1915 Model
     Quick firing gun in deck mount
     on centreline aft
      4 - 1.97" / 50.0 mm guns (2x2 guns), 3.81lbs / 1.73kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      14 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1921 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 235 lbs / 106 kg
   Shells per gun, main battery: 300

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.94" / 100 mm      3.94" / 100 mm
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.59" / 15 mm         -               -
   4th:   0.39" / 10 mm         -               -

   - Conning tower: 4.72" / 120 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 1 shaft, 550 shp / 411 Kw = 12.15 kts
   Range 1,000nm at 12.00 kts
   Bunker at max displacement = 35 tons

Complement:
   58 - 76

Cost:
   £0.116 million / $0.463 million

Distribution of weights at normal displacement:
   Armament: 30 tons, 5.3 %
   Armour: 49 tons, 8.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 42 tons, 7.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 7 tons, 1.2 %
   Machinery: 19 tons, 3.3 %
   Hull, fittings & equipment: 302 tons, 52.7 %
   Fuel, ammunition & stores: 73 tons, 12.7 %
   Miscellaneous weights: 100 tons, 17.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     863 lbs / 392 Kg = 8.4 x 5.9 " / 150 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.543
   Length to Beam Ratio: 5.79 : 1
   'Natural speed' for length: 13.43 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   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:      10.66 ft / 3.25 m
      - Forecastle (20 %):   10.66 ft / 3.25 m (6.56 ft / 2.00 m aft of break)
      - Mid (50 %):      6.56 ft / 2.00 m
      - Quarterdeck (5 %):   6.56 ft / 2.00 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   7.38 ft / 2.25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.9 %
      - Above water (accommodation/working, high = better): 81.4 %
   Waterplane Area: 3,779 Square feet or 351 Square metres
   Displacement factor (Displacement / loading): 134 %
   Structure weight / hull surface area: 59 lbs/sq ft or 287 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.26
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Jefgte]

...Stability (Unstable if below 1.00): 1.02...

...low stability because

... 2 - 5.91" / 150 mm guns (1x2 guns), 99.21lbs / 45.00kg shells, 1902 Model
    Breech loading guns in a deck mount with hoist
    on centreline forward, all raised guns - superfiring
...

Jef  ;)

[snip]

Emperess Longyu , Middle Kingdom Monitor laid down 1921

Displacement:
   500 t light; 554 t standard; 573 t normal; 588 t full load

Dimensions: Length overall / water x beam x draught
   180.45 ft / 180.45 ft x 31.17 ft x 6.56 ft (normal load)
   55.00 m / 55.00 m x 9.50 m  x 2.00 m

Armament:
      2 - 5.91" / 150 mm guns (1x2 guns), 99.21lbs / 45.00kg shells, 1915 Model
     Breech loading guns in a deck mount with hoist
     on centreline forward
      1 - 2.95" / 75.0 mm guns in single mounts, 14.33lbs / 6.50kg shells, 1915 Model
     Quick firing gun in deck mount
     on centreline aft
      4 - 1.97" / 50.0 mm guns (2x2 guns), 3.81lbs / 1.73kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      12 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1921 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 234 lbs / 106 kg
   Shells per gun, main battery: 300

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm   153.38 ft / 46.75 m   6.69 ft / 2.04 m
   Ends:   0.20" / 5 mm     27.03 ft / 8.24 m   6.69 ft / 2.04 m
   Upper:   0.59" / 15 mm   153.38 ft / 46.75 m   6.56 ft / 2.00 m
     Main Belt covers 131 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.39" / 10 mm         -               -
   4th:   0.20" / 5 mm         -               -

   - Armour deck: 0.79" / 20 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 1 shaft, 550 shp / 411 Kw = 12.15 kts
   Range 1,000nm at 12.00 kts
   Bunker at max displacement = 35 tons

Complement:
   58 - 76

Cost:
   £0.115 million / $0.462 million

Distribution of weights at normal displacement:
   Armament: 30 tons, 5.2 %
   Armour: 141 tons, 24.6 %
      - Belts: 59 tons, 10.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 21 tons, 3.7 %
      - Armour Deck: 55 tons, 9.6 %
      - Conning Tower: 6 tons, 1.0 %
   Machinery: 19 tons, 3.3 %
   Hull, fittings & equipment: 260 tons, 45.4 %
   Fuel, ammunition & stores: 73 tons, 12.7 %
   Miscellaneous weights: 50 tons, 8.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,066 lbs / 484 Kg = 10.4 x 5.9 " / 150 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 12.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.543
   Length to Beam Ratio: 5.79 : 1
   'Natural speed' for length: 13.43 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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:      6.56 ft / 2.00 m
      - Forecastle (10 %):   6.56 ft / 2.00 m
      - Mid (50 %):      6.56 ft / 2.00 m
      - Quarterdeck (5 %):   6.56 ft / 2.00 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   6.56 ft / 2.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 65.4 %
      - Above water (accommodation/working, high = better): 81.4 %
   Waterplane Area: 3,779 Square feet or 351 Square metres
   Displacement factor (Displacement / loading): 122 %
   Structure weight / hull surface area: 52 lbs/sq ft or 254 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.86
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Better?

[Jefgte]

Better

8)

[snip]

a little something I have been working on...

Name: Dalian Class Cruiser
Stats: CLASSIFIED
Planed for lay down at sometime, in some number
;D