Croiseurs de 3ème classe - Third class Cruisers

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Danjoult-Dufort, France PC1 laid down 1895



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Displacement:
   2 950 t light; 3 067 t standard; 3 589 t normal; 4 006 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (341.00 ft / 334.00 ft) x 38.05 ft (Bulges 43.97 ft) x (15.14 / 16.76 ft)
   (103.94 m / 101.80 m) x 11.60 m (Bulges 13.40 m)  x (4.61 / 5.11 m)

Armament:
      2 - 5.50" / 140 mm 45.0 cal guns - 83.91lbs / 38.06kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1895 Model
     2 x Single mounts on centreline ends, evenly spread
      2 - 5.50" / 140 mm 45.0 cal guns - 83.91lbs / 38.06kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1895 Model
     2 x Single mounts on sides, forward deck aft
      4 - 3.95" / 100 mm 45.0 cal guns - 31.09lbs / 14.10kg shells, 220 per gun
     Breech loading guns in deck mounts, 1895 Model
     4 x Single mounts on sides, evenly spread
      4 - 1.85" / 47.0 mm 45.0 cal guns - 3.20lbs / 1.45kg shells, 300 per gun
     Breech loading guns in deck mounts, 1895 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      4 - 0.30" / 7.6 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 500 per gun
     Machine guns in deck mounts, 1895 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 473 lbs / 214 kg
      Main Torpedoes
      2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.372 t each, 0.744 t total
   submerged bow & stern tubes
      2nd Torpedoes
      2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.372 t each, 0.744 t total
   In 2 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.99" / 25 mm   301.85 ft / 92.00 m   7.87 ft / 2.40 m
   Ends:   Unarmoured
     Main Belt covers 139 % of normal length
     Main Belt inclined -30.00 degrees (positive = in)

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.77" / 45 mm         -         1.77" / 45 mm
   2nd:   1.77" / 45 mm         -         1.77" / 45 mm
   3rd:   0.40" / 10 mm         -               -
   4th:   0.40" / 10 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 1.77" / 45 mm, Aft 1.77" / 45 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 7 600 ihp / 5 669 Kw = 19.10 kts
   Range 6 500nm at 10.00 kts
   Bunker at max displacement = 939 tons (100% coal)

Complement:
   231 - 301

Cost:
   £0.338 million / $1.353 million

Distribution of weights at normal displacement:
   Armament: 114 tons, 3.2 %
      - Guns: 112 tons, 3.1 %
      - Weapons: 2 tons, 0.1 %
   Armour: 430 tons, 12.0 %
      - Belts: 93 tons, 2.6 %
      - Armament: 28 tons, 0.8 %
      - Armour Deck: 292 tons, 8.1 %
      - Conning Towers: 18 tons, 0.5 %
   Machinery: 1 402 tons, 39.1 %
   Hull, fittings & equipment: 974 tons, 27.1 %
   Fuel, ammunition & stores: 639 tons, 17.8 %
   Miscellaneous weights: 30 tons, 0.8 %
      - On freeboard deck: 30 tons
                 2 tons for torpedoes
                 4 tons for reload torpedoes
                 24 minens

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2 233 lbs / 1 013 Kg = 26.8 x 5.5 " / 140 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.61
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
   Hull has low forecastle, rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.565 / 0.570
   Length to Beam Ratio: 7.60 : 1
   'Natural speed' for length: 18.28 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -30.00 degrees
   Stern overhang: 1.00 ft / 0.30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  11.80 ft / 3.60 m,  13.78 ft / 4.20 m
      - Forward deck:   8.00 %,  14.78 ft / 4.50 m,  14.78 ft / 4.50 m
      - Aft deck:   62.00 %,  11.80 ft / 3.60 m,  11.80 ft / 3.60 m
      - Quarter deck:   15.00 %,  11.80 ft / 3.60 m,  11.80 ft / 3.60 m
      - Average freeboard:      12.22 ft / 3.72 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 138.0 %
      - Above water (accommodation/working, high = better): 89.6 %
   Waterplane Area: 8 995 Square feet or 836 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 68 lbs/sq ft or 334 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.50
      - Overall: 1.00
   Cramped 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

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PC2, France PC2 laid down 1896



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Duvalles-Dassonville  -  Dentraigue-Duvillars  -  Darras-Denevers  -  Domberval-Dersignac
Displacement:
   3 200 t light; 3 337 t standard; 3 876 t normal; 4 306 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (351.50 ft / 344.50 ft) x 38.05 ft (Bulges 45.92 ft) x (15.20 / 16.82 ft)
   (107.14 m / 105.00 m) x 11.60 m (Bulges 14.00 m)  x (4.63 / 5.13 m)

Armament:
      2 - 5.50" / 140 mm 45.0 cal guns - 83.91lbs / 38.06kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1896 Model
     2 x Single mounts on centreline ends, evenly spread
      4 - 5.50" / 140 mm 45.0 cal guns - 83.91lbs / 38.06kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1896 Model
     4 x Single mounts on sides, forward deck aft
      4 - 3.95" / 100 mm 45.0 cal guns - 31.09lbs / 14.10kg shells, 220 per gun
     Breech loading guns in deck mounts, 1896 Model
     4 x Single mounts on sides, evenly spread
      4 - 1.85" / 47.0 mm 45.0 cal guns - 3.20lbs / 1.45kg shells, 300 per gun
     Breech loading guns in deck mounts, 1896 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      4 - 0.30" / 7.6 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 500 per gun
     Machine guns in deck mounts, 1896 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 641 lbs / 291 kg
      Main Torpedoes
      2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.386 t each, 0.772 t total
   submerged bow & stern tubes
      2nd Torpedoes
      2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.386 t each, 0.772 t total
   In 2 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.99" / 25 mm   314.95 ft / 96.00 m   8.87 ft / 2.70 m
   Ends:   Unarmoured
     Main Belt covers 141 % of normal length
     Main Belt inclined -30.00 degrees (positive = in)

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.77" / 45 mm         -         1.77" / 45 mm
   2nd:   1.77" / 45 mm         -         1.77" / 45 mm
   3rd:   0.40" / 10 mm         -               -
   4th:   0.40" / 10 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 1.77" / 45 mm, Aft 1.77" / 45 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 8 200 ihp / 6 117 Kw = 19.28 kts
   Range 6 500nm at 10.00 kts
   Bunker at max displacement = 969 tons (100% coal)

Complement:
   245 - 319

Cost:
   £0.375 million / $1.502 million

Distribution of weights at normal displacement:
   Armament: 159 tons, 4.1 %
      - Guns: 157 tons, 4.0 %
      - Weapons: 3 tons, 0.1 %
   Armour: 466 tons, 12.0 %
      - Belts: 108 tons, 2.8 %
      - Armament: 38 tons, 1.0 %
      - Armour Deck: 301 tons, 7.8 %
      - Conning Towers: 19 tons, 0.5 %
   Machinery: 1 492 tons, 38.5 %
   Hull, fittings & equipment: 1 050 tons, 27.1 %
   Fuel, ammunition & stores: 675 tons, 17.4 %
   Miscellaneous weights: 34 tons, 0.9 %
      - On freeboard deck: 34 tons
                 2 tons for torpedoes
                 4 tons for reload torpedoes
                 28 minens


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2 337 lbs / 1 060 Kg = 28.1 x 5.5 " / 140 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.59
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.25
   Seaboat quality  (Average = 1.00): 1.61

Hull form characteristics:
   Hull has low forecastle, rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.564 / 0.566
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 18.56 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -30.00 degrees
   Stern overhang: 1.00 ft / 0.30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  12.15 ft / 3.70 m,  14.10 ft / 4.30 m
      - Forward deck:   10.00 %,  15.10 ft / 4.60 m,  15.10 ft / 4.60 m
      - Aft deck:   60.00 %,  12.15 ft / 3.70 m,  12.15 ft / 3.70 m
      - Quarter deck:   15.00 %,  12.15 ft / 3.70 m,  12.15 ft / 3.70 m
      - Average freeboard:      12.62 ft / 3.85 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 139.0 %
      - Above water (accommodation/working, high = better): 90.2 %
   Waterplane Area: 9 272 Square feet or 861 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 71 lbs/sq ft or 349 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.47
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Adequate 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