Korsarze (Corsairs - was Torpedo-Boat Carriers)

[The Rock Doctor]

Not really sure there'll be many of them but here we go.

Note:  Change in nomenclature for 1917, reflecting the more multi-mission capability of the second ship.

[The Rock Doctor]

Orzel Class Korsarz


The Union, like everybody else, is hopping aboard the torpedo-boat carrier bandwagon - at least for the purposes of building a prototype for trials and testing.

The Union considered what was known about various existing models worldwide, which wasn't a great deal, and concluded that there were (potentially) tactical and strategic functions for such a ship. 

The strategic role was about long-term basing, which involved ample and comfortable MTB crew accommodation, supplies of expendables, workshops and spare parts - a depot ship.  Such a ship was notionally on the slow side, since it spent most of its life anchored as a floating base, and probably wouldn't be heavily armed or armored.

The tactical role was about short-term transport in and out of a combat zone, with a limited number of actual missions corresponding to the duration of a naval battle or until the loss of tactical surprise.  This was generally in line with what was known about Parthian torpedo-boat carriers.  The Union went a step further, though, and ruled out a back-up role as a protected cruiser.  The amount of space and weight dedicated to the MTBs would mean the ship would be under-armed, armored, or propelled compared to actual protected cruisers of the same size.

So the ship is designed around these principles:

-The ship and its cargo are a scalpel, to be used for surprise raids rather than fleet actions.  Their value rapidly decreases once the enemy is aware of their presence.  Hence, only a limited amount of expendables are embarked and depot ship functions are not built in, because the ship will conduct its mission and then return to base.

-Large powerplant and good seakeeping allowing fast transit into and out of the combat zone, ideally at night.

-Long hull with a crane and cradle on the beam for each MTB, theoretically allowing for simultaneous unloading and loading of all six MTB in the shortest possible time period.

-No armor and limited armament - though theoretically sufficient to deal with a patrol craft, sacrifices must be made.

Orzel, KS-1, laid down 1914

AS REFITTED, 1931

Enter ship name, Enter country Enter ship type laid down 1914 (Engine 1931)

Displacement:
   3,622 t light; 3,746 t standard; 3,994 t normal; 4,193 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (436.95 ft / 426.51 ft) x 45.93 ft x (14.27 / 14.80 ft)
   (133.18 m / 130.00 m) x 14.00 m  x (4.35 / 4.51 m)

Armament:
      3 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1914 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      4 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1914 Model
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
     2 x Single mounts on sides, forward deck aft
      6 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1914 Model
     1 x Twin mount on centreline, aft deck forward
      1 raised mount
     2 x Twin mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 220 lbs / 100 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      1.97" / 50 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 44,235 shp / 33,000 Kw = 30.21 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 447 tons

Complement:
   250 - 326

Cost:
   £0.424 million / $1.694 million

Distribution of weights at normal displacement:
   Armament: 60 tons, 1.5%
      - Guns: 60 tons, 1.5%
   Armour: 36 tons, 0.9%
      - Armament: 14 tons, 0.4%
      - Conning Tower: 21 tons, 0.5%
   Machinery: 1,323 tons, 33.1%
   Hull, fittings & equipment: 1,387 tons, 34.7%
   Fuel, ammunition & stores: 372 tons, 9.3%
   Miscellaneous weights: 816 tons, 20.4%
      - Hull below water: 100 tons
      - Hull above water: 300 tons
      - On freeboard deck: 360 tons
      - Above deck: 56 tons

-96 t:  12 missions worth of MTB ammo/fuel (2 x18" torpedo & 4 t fuel per boat-mission) (BW)
-300 t:  Accommodation for 150 personnel (Some combo of up to 120 naval infantry, 18 landing craft crew, and/or 36 MTB personnel (AW)
-360 t:  6 x 20 t MTB, cradle, and cranes (FD)
-25 t:  Night-fighting doodads (AD)
-25 t:  L/R wireless (AD)
-6 t:  1908 Fire Control (AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,226 lbs / 1,463 Kg = 48.1 x 5.1 " / 130 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 14.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 62 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.506
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00%,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   30.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   35.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   15.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 123.9%
      - Above water (accommodation/working, high = better): 169.7%
   Waterplane Area: 13,053 Square feet or 1,213 Square metres
   Displacement factor (Displacement / loading): 108%
   Structure weight / hull surface area: 64 lbs/sq ft or 310 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.89
      - Overall: 0.91
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

AS BUILT

Enter ship name, Enter country Enter ship type laid down 1914

Displacement:
   3,543 t light; 3,654 t standard; 3,994 t normal; 4,266 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (436.95 ft / 426.51 ft) x 45.93 ft x (14.27 / 15.00 ft)
   (133.18 m / 130.00 m) x 14.00 m  x (4.35 / 4.57 m)

Armament:
      3 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1914 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      4 - 0.39" / 10.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1914 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      1 - 2.95" / 75.0 mm 45.0 cal gun - 12.99lbs / 5.89kg shells, 250 per gun
     Anti-air gun in deck mount, 1914 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount
      Weight of broadside 216 lbs / 98 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      1.97" / 50 mm
   2nd:   0.39" / 10 mm         -               -
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 37,533 shp / 28,000 Kw = 29.04 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 613 tons

Complement:
   250 - 326

Cost:
   £0.441 million / $1.764 million

Distribution of weights at normal displacement:
   Armament: 57 tons, 1.4 %
      - Guns: 57 tons, 1.4 %
   Armour: 37 tons, 0.9 %
      - Armament: 16 tons, 0.4 %
      - Conning Tower: 21 tons, 0.5 %
   Machinery: 1,446 tons, 36.2 %
   Hull, fittings & equipment: 1,360 tons, 34.0 %
   Fuel, ammunition & stores: 451 tons, 11.3 %
   Miscellaneous weights: 643 tons, 16.1 %
      - Hull below water: 100 tons
      - Hull above water: 200 tons
      - On freeboard deck: 293 tons
      - Above deck: 50 tons

Fittings:
360 t: 6 x 20 t MTB, cradle, and cranes
100 t:  MTB crew accommodation
96 t:  12 missions worth of MTB ammo/fuel (2 x18" torpedo & 4 t fuel per boat-mission)
31 t:  Weight reserve
25 t:  Night-fighting doodads
25 t:  L/R wireless
6 t:  1908 Fire Control

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,957 lbs / 1,341 Kg = 44.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 2.0 ft / 0.6 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.508
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   40.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 130.5 %
      - Above water (accommodation/working, high = better): 169.7 %
   Waterplane Area: 13,053 Square feet or 1,213 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 62 lbs/sq ft or 304 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.85
      - Overall: 0.91
   Cramped 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

[The Rock Doctor]

Rybolow Class Korsarz

The Rybolow is about 20% heavier than the Orzel, which allows:

-An extra knot or so of speed
-A slightly heavier main battery
-Two extra cradles/davits for MTB or landing craft, and
-The capability of carrying a company of 120 marines

Notionally the strike group would be either 8 x MTB-B/C, or 2 MTB & 6 landing craft carrying marines.  There's probably a scenario where the ship might embark four and four, and another where it might take on a full eight landing craft for some reason. 

At any rate, it does provide the Union Navy with a multi-function, high-speed nuisance ship that could attack enemy bases, installations, or other facilities in different ways.

Rybolow, KS-2, laid down 1917
Jastrzab, KS-3, laid down 1919

Enter ship name, Enter country Enter ship type laid down 1917

Displacement:
   4,368 t light; 4,507 t standard; 4,880 t normal; 5,178 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (491.08 ft / 482.28 ft) x 45.93 ft x (15.42 / 16.13 ft)
   (149.68 m / 147.00 m) x 14.00 m  x (4.70 / 4.92 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1917 Model
     2 x Twin mounts on centreline, evenly spread
      4 - 0.39" / 10.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 4,000 per gun
     Machine guns in deck mounts, 1917 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 250 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on centreline, evenly spread
      2 raised mounts
      Weight of broadside 297 lbs / 135 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   0.79" / 20 mm      1.97" / 50 mm
   2nd:   0.39" / 10 mm         -               -
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 45,577 shp / 34,000 Kw = 30.07 kts
   Range 8,500nm at 10.00 kts
   Bunker at max displacement = 671 tons

Complement:
   291 - 379

Cost:
   £0.752 million / $3.010 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 1.3 %
      - Guns: 64 tons, 1.3 %
   Armour: 22 tons, 0.5 %
      - Armament: 22 tons, 0.5 %
   Machinery: 1,671 tons, 34.2 %
   Hull, fittings & equipment: 1,613 tons, 33.0 %
   Fuel, ammunition & stores: 512 tons, 10.5 %
   Miscellaneous weights: 999 tons, 20.5 %
      - Hull below water: 160 tons
      - Hull above water: 300 tons
      - On freeboard deck: 480 tons
      - Above deck: 59 tons

Fittings:
-480 t:  Cradles for 8 x MTB-B or -C, or 20 t landing craft
-300 t:  Accommodation for 150 personnel (120 marines, 18 landing craft crew and 12 MTB crew or just 48 MTB crew)
-148 t:  Fuel and ordinance for 16 MTB sorties (below water)
-25 t:  Night-fighting doodads
-25 t:  L/R wireless
-7 t:  Fire control
-14 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,503 lbs / 1,589 Kg = 52.3 x 5.1 " / 130 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 1.8 ft / 0.6 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.507
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 4.92 ft / 1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   40.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 126.8 %
      - Above water (accommodation/working, high = better): 164.8 %
   Waterplane Area: 14,759 Square feet or 1,371 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 64 lbs/sq ft or 312 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 1.50
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped 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