Gunboats (and torpedo gunboats)

[Darman]

Alert, United Kingdom Screw Sloop laid down 1894 (Engine 1890)
Corvette (Unarmoured)

Displacement:
   820 t light; 857 t standard; 982 t normal; 1,081 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (180.00 ft / 180.00 ft) x 32.00 ft x (12.00 / 12.91 ft)
   (54.86 m / 54.86 m) x 9.75 m  x (3.66 / 3.94 m)

Armament:
      6 - 4.00" / 102 mm 40.0 cal guns - 30.67lbs / 13.91kg shells, 150 per gun
     Breech loading guns in broadside mounts, 1894 Model
     6 x Single mounts on sides, evenly spread
      3 - 1.85" / 47.0 mm 40.0 cal guns - 3.00lbs / 1.36kg shells, 300 per gun
     Quick firing guns in deck mounts, 1894 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
     1 x Single mount on centreline, forward deck forward
      1 raised mount
      Weight of broadside 193 lbs / 88 kg

Machinery:
   Coal fired boilers, reciprocating steam engines,
   Direct drive, 2 shafts, 2,767 ihp / 2,064 Kw = 17.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 224 tons (100% coal)

Complement:
   86 - 113

Cost:
   £0.099 million / $0.396 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 2.6 %
   Machinery: 442 tons, 45.0 %
   Hull, fittings & equipment: 267 tons, 27.2 %
   Fuel, ammunition & stores: 161 tons, 16.4 %
   Miscellaneous weights: 87 tons, 8.8 %
      - Hull below water: 64 tons
      - Hull above water: 8 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     521 lbs / 236 Kg = 16.3 x 4.0 " / 102 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.88
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 8.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 65 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   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): 0.497 / 0.509
   Length to Beam Ratio: 5.63 : 1
   'Natural speed' for length: 13.42 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  14.76 ft / 4.50 m,  9.39 ft / 2.86 m
      - Forward deck:   30.00 %,  9.39 ft / 2.86 m,  9.39 ft / 2.86 m
      - Aft deck:   35.00 %,  9.39 ft / 2.86 m,  9.39 ft / 2.86 m
      - Quarter deck:   15.00 %,  9.39 ft / 2.86 m,  9.39 ft / 2.86 m
      - Average freeboard:      9.82 ft / 2.99 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 162.3 %
      - Above water (accommodation/working, high = better): 79.6 %
   Waterplane Area: 3,827 Square feet or 356 Square metres
   Displacement factor (Displacement / loading): 81 %
   Structure weight / hull surface area: 45 lbs/sq ft or 222 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.87
      - Longitudinal: 3.37
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Good seaboat, rides out heavy weather easily

Ship-Rigged, maximum of 8.9 knots under sail.  (values based on normal displacement)
1.5% above deck: 14.7t
6.5% lower hull: 63.8t

8t misc weight for additional storage. 

HMS Alert
HMS Torch
HMS Basilisk
HMS Nymphe
HMS Daphne
HMS Hyacinth
HMS Royalist
HMS Satellite
HMS Heroine
HMS Swallow
HMS Beagle
HMS Buzzard

[Darman]

Dryad, United Kingdom Torpedo Gun Boat laid down 1896 (Engine 1890)

Displacement:
   1,310 t light; 1,348 t standard; 1,493 t normal; 1,609 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (262.00 ft / 262.00 ft) x 30.50 ft x (13.00 / 13.76 ft)
   (79.86 m / 79.86 m) x 9.30 m  x (3.96 / 4.19 m)

Armament:
      2 - 4.70" / 119 mm 40.0 cal guns - 49.75lbs / 22.57kg shells, 100 per gun
     Quick firing guns in deck mounts, 1896 Model
     2 x Single mounts on centreline ends, evenly spread
      4 - 2.24" / 57.0 mm 40.0 cal guns - 6.00lbs / 2.72kg shells, 200 per gun
     Quick firing guns in deck mounts, 1896 Model
     4 x Single mounts on sides amidships
      5 - 0.45" / 11.4 mm 45.0 cal guns - 0.05lbs / 0.02kg shells, 3,000 per gun
     Machine guns in deck mount, 1896 Model
     1 x Quintuple mount on centreline, forward evenly spread
      1 raised mount
      Weight of broadside 124 lbs / 56 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 5,585 ihp / 4,166 Kw = 20.00 kts
   Range 1,000nm at 15.00 kts
   Bunker at max displacement = 260 tons (100% coal)

Complement:
   119 - 156

Cost:
   £0.165 million / $0.661 million

Distribution of weights at normal displacement:
   Armament: 20 tons, 1.3 %
   Armour: 2 tons, 0.2 %
      - Armament: 2 tons, 0.2 %
   Machinery: 815 tons, 54.6 %
   Hull, fittings & equipment: 452 tons, 30.3 %
   Fuel, ammunition & stores: 183 tons, 12.3 %
   Miscellaneous weights: 20 tons, 1.3 %
      - On freeboard deck: 20 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     617 lbs / 280 Kg = 11.9 x 4.7 " / 119 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.54
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 9.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 96 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 1.91

Hull form characteristics:
   Hull has rise forward of midbreak, raised quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.503 / 0.512
   Length to Beam Ratio: 8.59 : 1
   'Natural speed' for length: 16.19 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  15.00 ft / 4.57 m,  14.00 ft / 4.27 m
      - Forward deck:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Aft deck:   35.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Average freeboard:      12.33 ft / 3.76 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 179.9 %
      - Above water (accommodation/working, high = better): 96.4 %
   Waterplane Area: 5,339 Square feet or 496 Square metres
   Displacement factor (Displacement / loading): 67 %
   Structure weight / hull surface area: 45 lbs/sq ft or 222 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.90
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc weight: 20t is for 5 torpedo tubes (2 fixed forward, 2 rotating on each side and 1 rotating centerline) with 3 additional reloads each (15 reloads total).

Machine gun is a Nordenfelt Mk I rifle-caliber 5-barrel deck mount. 

HMS Dryad
HMS Caroline
HMS Hazard
HMS Harrier
HMS Halcyon
HMS Hussar

[Darman]

Alarm, United Kingdom Torpedo Gun Boat laid down 1898 (Engine 1900)

Displacement:
   785 t light; 813 t standard; 880 t normal; 933 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (242.00 ft / 242.00 ft) x 27.00 ft x (12.50 / 12.97 ft)
   (73.76 m / 73.76 m) x 8.23 m  x (3.81 / 3.95 m)

Armament:
      2 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
     Quick firing guns in deck mounts, 1898 Model
     2 x Single mounts on centreline ends, evenly spread
      4 - 1.85" / 47.0 mm 40.0 cal guns - 3.04lbs / 1.38kg shells, 250 per gun
     Quick firing guns in deck mounts, 1898 Model
     4 x Single mounts on sides amidships
      Weight of broadside 117 lbs / 53 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 3,238 ihp / 2,415 Kw = 19.00 kts
   Range 750nm at 15.00 kts
   Bunker at max displacement = 120 tons (100% coal)

Complement:
   80 - 105

Cost:
   £0.093 million / $0.372 million

Distribution of weights at normal displacement:
   Armament: 21 tons, 2.4 %
   Armour: 2 tons, 0.3 %
      - Armament: 2 tons, 0.3 %
   Machinery: 428 tons, 48.7 %
   Hull, fittings & equipment: 325 tons, 36.9 %
   Fuel, ammunition & stores: 95 tons, 10.8 %
   Miscellaneous weights: 9 tons, 1.0 %
      - On freeboard deck: 9 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     465 lbs / 211 Kg = 9.0 x 4.7 " / 119 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 10.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.25
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.377 / 0.385
   Length to Beam Ratio: 8.96 : 1
   'Natural speed' for length: 15.56 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  15.00 ft / 4.57 m,  14.00 ft / 4.27 m
      - Forward deck:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 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:      11.58 ft / 3.53 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 163.9 %
      - Above water (accommodation/working, high = better): 106.3 %
   Waterplane Area: 3,962 Square feet or 368 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 4.11
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

6t misc weight at deck-level for 3 loaded torpedo tubes (2 fixed forward, 1 revolving centerline) plus 3 reloads (1 each). 

HMS Alarm
HMS Jaseur
HMS Antelope
HMS Jason
HMS Renard
HMS Rapide
HMS Niger
HMS Speedy
HMS Circe
HMS Hebe
HMS Onyx
HMS Leda