Royal Rajasthan Navy

[Khryses]

On to the Royal Rajasthani!

Based on legends of yore, the RRS Rajputana is a short-legged Coastal Battleship suitable for port defense or bombardment. She's not designed to go toe to toe against Parthian heavies, but anything fast enough to catch her before she can retreat into the harbour... well, things happen, you know?

Note the unusual configuration with the tertiary battery mounted (2 each) on top of the secondary battery casemates.

Rajputana, Rajput Coastal Battleship laid down 1920

Displacement:
   13,917 t light; 15,777 t standard; 16,298 t normal; 16,715 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (459.32 ft / 459.32 ft) x 78.74 ft x (24.61 / 25.14 ft)
   (140.00 m / 140.00 m) x 24.00 m  x (7.50 / 7.66 m)

Armament:
      4 - 12.20" / 310 mm 45.0 cal guns - 916.73lbs / 415.82kg shells, 160 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     2 x Twin mounts on centreline, evenly spread
      8 - 8.27" / 210 mm 45.0 cal guns - 284.98lbs / 129.26kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1920 Model
     4 x Single mounts on side ends, evenly spread
     4 x Single mounts on side ends, evenly spread
      16 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 8,000 per gun
     Breech loading guns in deck mounts, 1920 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      12 - 0.39" / 10.0 mm 90.0 cal guns - 0.04lbs / 0.02kg shells, 8,000 per gun
     Machine guns in deck mounts, 1920 Model
     12 x Single mounts on sides, evenly spread
      Weight of broadside 6,176 lbs / 2,801 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   15.0" / 380 mm   298.56 ft / 91.00 m   10.66 ft / 3.25 m
   Ends:   7.87" / 200 mm   160.73 ft / 48.99 m   10.66 ft / 3.25 m
   Upper:   7.87" / 200 mm   298.56 ft / 91.00 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   7.87" / 200 mm      15.0" / 380 mm
   2nd:   4.72" / 120 mm         -               -
   3rd:   1.18" / 30 mm   1.18" / 30 mm            -

   - Armoured deck - multiple decks:
   For and Aft decks: 3.94" / 100 mm
   Forecastle: 3.94" / 100 mm  Quarter deck: 3.94" / 100 mm

   - Conning towers: Forward 14.96" / 380 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 38,363 shp / 28,619 Kw = 23.00 kts
   Range 3,000nm at 12.00 kts
   Bunker at max displacement = 938 tons (90% coal)

Complement:
   720 - 937

Cost:
   £2.727 million / $10.909 million

Distribution of weights at normal displacement:
   Armament: 1,022 tons, 6.3 %
      - Guns: 1,022 tons, 6.3 %
   Armour: 6,716 tons, 41.2 %
      - Belts: 3,462 tons, 21.2 %
      - Armament: 1,030 tons, 6.3 %
      - Armour Deck: 2,018 tons, 12.4 %
      - Conning Tower: 207 tons, 1.3 %
   Machinery: 1,461 tons, 9.0 %
   Hull, fittings & equipment: 4,448 tons, 27.3 %
   Fuel, ammunition & stores: 2,381 tons, 14.6 %
   Miscellaneous weights: 270 tons, 1.7 %
      - Hull below water: 140 tons
      - Hull above water: 70 tons
      - Above deck: 60 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     23,319 lbs / 10,577 Kg = 25.7 x 12.2 " / 310 mm shells or 3.2 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a straight bulbous bow and a round stern
   Block coefficient (normal/deep): 0.641 / 0.644
   Length to Beam Ratio: 5.83 : 1
   'Natural speed' for length: 21.43 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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 %,  22.97 ft / 7.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  14.44 ft / 4.40 m
      - Aft deck:   35.00 %,  14.44 ft / 4.40 m,  14.44 ft / 4.40 m
      - Quarter deck:   15.00 %,  14.44 ft / 4.40 m,  14.44 ft / 4.40 m
      - Average freeboard:      16.09 ft / 4.91 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 65.1 %
      - Above water (accommodation/working, high = better): 111.0 %
   Waterplane Area: 27,478 Square feet or 2,553 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 130 lbs/sq ft or 636 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.70
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

--25t = searchlight tower
--106t = fire control
--140t = torpedo nets

[Khryses]

The early armoured cruiser, the Chaimpiyan-class designed as an answer to the Parthian and Byzantine 4 x 10" cruisers.

Chaimpiyan, Rajput Armoured Cruiser laid down 1910

Displacement:
   15,836 t light; 16,768 t standard; 17,751 t normal; 18,538 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (656.82 ft / 643.04 ft) x 78.74 ft x (22.31 / 23.09 ft)
   (200.20 m / 196.00 m) x 24.00 m  x (6.80 / 7.04 m)

Armament:
      8 - 10.00" / 254 mm 45.0 cal guns - 504.26lbs / 228.73kg shells, 180 per gun
     Breech loading guns in turret on barbette mounts, 1910 Model
     4 x Twin mounts on centreline, evenly spread
      2 raised mounts
      16 - 5.98" / 152 mm 45.0 cal guns - 108.07lbs / 49.02kg shells, 180 per gun
     Quick firing guns in casemate mounts, 1910 Model
     16 x Single mounts on sides, evenly spread
      8 - 0.39" / 10.0 mm 90.0 cal guns - 0.04lbs / 0.02kg shells, 4,000 per gun
     Machine guns in deck mounts, 1910 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 5,763 lbs / 2,614 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.87" / 200 mm   417.98 ft / 127.40 m   10.66 ft / 3.25 m
   Ends:   1.97" / 50 mm   225.03 ft / 68.59 m   10.66 ft / 3.25 m
   Upper:   3.54" / 90 mm   417.98 ft / 127.40 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.45" / 240 mm   2.95" / 75 mm      7.87" / 200 mm
   2nd:   7.09" / 180 mm   2.95" / 75 mm      6.30" / 160 mm
   3rd:   1.18" / 30 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 9.45" / 240 mm, Aft 7.09" / 180 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 56,767 ihp / 42,348 Kw = 26.34 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,770 tons (90% coal)

Complement:
   768 - 999

Cost:
   £1.538 million / $6.152 million

Distribution of weights at normal displacement:
   Armament: 1,191 tons, 6.7 %
      - Guns: 1,191 tons, 6.7 %
   Armour: 4,677 tons, 26.3 %
      - Belts: 2,150 tons, 12.1 %
      - Armament: 1,189 tons, 6.7 %
      - Armour Deck: 1,095 tons, 6.2 %
      - Conning Towers: 242 tons, 1.4 %
   Machinery: 3,747 tons, 21.1 %
   Hull, fittings & equipment: 6,052 tons, 34.1 %
   Fuel, ammunition & stores: 1,915 tons, 10.8 %
   Miscellaneous weights: 169 tons, 1.0 %
      - Hull above water: 80 tons
      - On freeboard deck: 5 tons
      - Above deck: 84 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     19,967 lbs / 9,057 Kg = 39.9 x 10.0 " / 254 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.555
   Length to Beam Ratio: 8.17 : 1
   'Natural speed' for length: 25.36 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 9.84 ft / 3.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.31 ft / 6.80 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      17.76 ft / 5.41 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.4 %
      - Above water (accommodation/working, high = better): 150.4 %
   Waterplane Area: 35,337 Square feet or 3,283 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 136 lbs/sq ft or 663 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.02
      - 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

--25t = Searchlight/nightfighting
--119t = fire control
--25t = long range wireless

[Khryses]

And the simple improvement on the same concept, dated 10 years later...

Chaimpiyan, Rajput Armoured Cruiser laid down 1920

Displacement:
   16,001 t light; 17,066 t standard; 17,751 t normal; 18,299 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (657.17 ft / 643.04 ft) x 78.74 ft x (22.31 / 22.85 ft)
   (200.30 m / 196.00 m) x 24.00 m  x (6.80 / 6.97 m)

Armament:
      8 - 11.00" / 279 mm 45.0 cal guns - 671.17lbs / 304.44kg shells, 180 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     4 x Twin mounts on centreline, evenly spread
      2 raised mounts
      16 - 5.98" / 152 mm 45.0 cal guns - 108.07lbs / 49.02kg shells, 180 per gun
     Quick firing guns in casemate mounts, 1920 Model
     16 x Single mounts on sides, evenly spread
      8 - 0.39" / 10.0 mm 90.0 cal guns - 0.04lbs / 0.02kg shells, 4,000 per gun
     Machine guns in deck mounts, 1920 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 7,099 lbs / 3,220 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.27" / 210 mm   417.98 ft / 127.40 m   10.66 ft / 3.25 m
   Ends:   1.97" / 50 mm   225.03 ft / 68.59 m   10.66 ft / 3.25 m
   Upper:   3.54" / 90 mm   417.98 ft / 127.40 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.45" / 240 mm   2.95" / 75 mm      7.87" / 200 mm
   2nd:   7.09" / 180 mm   2.95" / 75 mm      6.30" / 160 mm
   3rd:   1.18" / 30 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 9.45" / 240 mm, Aft 7.09" / 180 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 71,399 shp / 53,264 Kw = 27.94 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,233 tons (90% coal)

Complement:
   768 - 999

Cost:
   £3.603 million / $14.410 million

Distribution of weights at normal displacement:
   Armament: 1,272 tons, 7.2 %
      - Guns: 1,272 tons, 7.2 %
   Armour: 4,962 tons, 28.0 %
      - Belts: 2,224 tons, 12.5 %
      - Armament: 1,400 tons, 7.9 %
      - Armour Deck: 1,095 tons, 6.2 %
      - Conning Towers: 242 tons, 1.4 %
   Machinery: 2,719 tons, 15.3 %
   Hull, fittings & equipment: 6,879 tons, 38.8 %
   Fuel, ammunition & stores: 1,751 tons, 9.9 %
   Miscellaneous weights: 169 tons, 1.0 %
      - Hull above water: 80 tons
      - On freeboard deck: 5 tons
      - Above deck: 84 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     23,854 lbs / 10,820 Kg = 35.8 x 11.0 " / 279 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 3.9 ft / 1.2 m
   Roll period: 16.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.79
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.554
   Length to Beam Ratio: 8.17 : 1
   'Natural speed' for length: 25.36 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 9.84 ft / 3.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  24.28 ft / 7.40 m,  22.31 ft / 6.80 m
      - Forward deck:   30.00 %,  22.31 ft / 6.80 m,  19.69 ft / 6.00 m
      - Aft deck:   35.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   15.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Average freeboard:      20.52 ft / 6.25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 82.4 %
      - Above water (accommodation/working, high = better): 177.8 %
   Waterplane Area: 35,337 Square feet or 3,283 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 147 lbs/sq ft or 716 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.29
      - Overall: 1.00
   Excellent 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

--25t = Searchlight/nightfighting
--127t = fire control
--25t = long range wireless