Steam and sail ships of the Imperial Navy

[KWorld]

Steam Junk, China Steam Junk laid down 1870
Corvette (Unarmoured)

Displacement:
   613 t light; 648 t standard; 679 t normal; 704 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (160.00 ft / 160.00 ft) x 30.00 ft x (9.00 / 9.27 ft)
   (48.77 m / 48.77 m) x 9.14 m  x (2.74 / 2.82 m)

Armament:
      2 - 9.00" / 229 mm 13.0 cal guns - 90.00lbs / 40.82kg shells, 100 per gun
     Muzzle loading guns in deck mounts, 1870 Model
     2 x Single mounts on centreline ends, evenly spread
      8 - 5.30" / 135 mm 12.0 cal guns - 32.00lbs / 14.51kg shells, 80 per gun
     Muzzle loading guns in broadside mounts, 1870 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 436 lbs / 198 kg

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 0 shafts, 510 ihp / 381 Kw = 11.00 kts
   Range 1,000nm at 7.00 kts
   Bunker at max displacement = 56 tons (100% coal)
     Caution: Too much power for reciprocating engines

Complement:
   66 - 86

Cost:
   £0.052 million / $0.207 million

Distribution of weights at normal displacement:
   Armament: 37 tons, 5.4 %
      - Guns: 37 tons, 5.4 %
   Machinery: 125 tons, 18.4 %
   Hull, fittings & equipment: 383 tons, 56.4 %
   Fuel, ammunition & stores: 66 tons, 9.7 %
   Miscellaneous weights: 68 tons, 10.0 %
      - Above deck: 68 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     781 lbs / 354 Kg = 3.1 x 9.0 " / 229 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.554
   Length to Beam Ratio: 5.33 : 1
   'Natural speed' for length: 12.65 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   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 %,  13.00 ft / 3.96 m,  11.00 ft / 3.35 m
      - Forward deck:   30.00 %,  11.00 ft / 3.35 m,  9.00 ft / 2.74 m
      - Aft deck:   35.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Average freeboard:      9.86 ft / 3.01 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.6 %
      - Above water (accommodation/working, high = better): 88.7 %
   Waterplane Area: 3,249 Square feet or 302 Square metres
   Displacement factor (Displacement / loading): 154 %
   Structure weight / hull surface area: 79 lbs/sq ft or 385 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.08
      - Longitudinal: 4.93
      - Overall: 1.25
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


A war junk with a boiler and propellor added.


9" guns are smoothbores mounted on fore and aft pivot mounts, 5.3" guns are smoothbores mounted
on the broadside.

Above-decks miscellaneous weight is masts and sails sufficient to drive the vessel at up to 11 knots in normal conditions.

[KWorld]

War Junk, China War Junk laid down 1870
Corvette (Unarmoured)

Displacement:
   644 t light; 679 t standard; 679 t normal; 679 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (160.00 ft / 160.00 ft) x 30.00 ft x (9.00 / 9.00 ft)
   (48.77 m / 48.77 m) x 9.14 m  x (2.74 / 2.74 m)

Armament:
      2 - 9.00" / 229 mm 13.0 cal guns - 89.99lbs / 40.82kg shells, 100 per gun
     Muzzle loading guns in deck mounts, 1870 Model
     2 x Single mounts on centreline ends, evenly spread
      8 - 5.30" / 135 mm 12.0 cal guns - 31.99lbs / 14.51kg shells, 80 per gun
     Muzzle loading guns in broadside mounts, 1870 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 436 lbs / 198 kg

Machinery:
   Immobile floating battery

Complement:
   66 - 86

Cost:
   £0.035 million / $0.141 million

Distribution of weights at normal displacement:
   Armament: 37 tons, 5.4 %
      - Guns: 37 tons, 5.4 %
   Machinery: 0 tons, 0.0 %
   Hull, fittings & equipment: 539 tons, 79.4 %
   Fuel, ammunition & stores: 35 tons, 5.1 %
   Miscellaneous weights: 68 tons, 10.0 %
      - Above deck: 68 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,822 lbs / 1,280 Kg = 11.1 x 9.0 " / 229 mm shells or 3.3 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.59
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.550
   Length to Beam Ratio: 5.33 : 1
   'Natural speed' for length: 12.65 kts
   Power going to wave formation at top speed: 0 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   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 %,  13.00 ft / 3.96 m,  11.00 ft / 3.35 m
      - Forward deck:   30.00 %,  11.00 ft / 3.35 m,  9.00 ft / 2.74 m
      - Aft deck:   35.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Average freeboard:      9.86 ft / 3.01 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 20.8 %
      - Above water (accommodation/working, high = better): 88.7 %
   Waterplane Area: 3,249 Square feet or 302 Square metres
   Displacement factor (Displacement / loading): 357 %
   Structure weight / hull surface area: 109 lbs/sq ft or 534 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.50
      - Longitudinal: 6.83
      - Overall: 1.75
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


9" guns are smoothbores mounted on fore and aft pivot mounts, 5.3" guns are smoothbores mounted
on the broadside.

Above-decks miscellaneous weight is masts and sails sufficient to drive the vessel at up to 11 knots in normal conditions.