Torpedo Boats, Gun Boats, etc.

[hooper82]

Torpedo Boats
* Yapabilir (TR-25) Class Torpedo Boat
* Firinci (TR-46) Class Torpedo Boat
* Köpek (TR-57) Class Torpedo Boat
* Kolay (TB3) Class Torpedo Boat

Gun Boats
* Nasil Class Gun Boat
* Oge (GB11) Class Gun Boat
* Na'am Class Gun Boat

[hooper82]

First Torpedo Boat with Steam Turbine Propulsion.  Replaced the TR1 Class Torpedo Boat.

22 In Service (TB-025 to TB-046)

Yapabilir (TR-25) Class Torpedo Boat, laid down 1908 (Engine 1909) - Design by Korpen

Displacement:
  305 t light; 314 t standard; 370 t normal; 415 t full load

Dimensions: Length overall / water x beam x draught
  233,95 ft / 226,38 ft x 19,03 ft x 7,22 ft (normal load)
  71,31 m / 69,00 m x 5,80 m  x 2,20 m

Armament:
     2 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1908 Model
    Breech loading guns in deck mounts
    on centreline ends, evenly spread
  Weight of broadside 26 lbs / 12 kg
  Shells per gun, main battery: 120
  3 - 17,7" / 450 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
  Main:   0,20" / 5 mm         -               -

Machinery:
  Coal and oil fired boilers, steam turbines,
  Direct drive, 2 shafts, 9 155 shp / 6 830 Kw = 28,00 kts
  Range 2 200nm at 12,00 kts
  Bunker at max displacement = 101 tons (90% coal)

Complement:
  41 - 54

Cost:
  £0,041 million / $0,166 million

Distribution of weights at normal displacement:
  Armament: 3 tons, 0,9 %
  Armour: 1 tons, 0,2 %
     - Belts: 0 tons, 0,0 %
     - Torpedo bulkhead: 0 tons, 0,0 %
     - Armament: 1 tons, 0,2 %
     - Armour Deck: 0 tons, 0,0 %
     - Conning Tower: 0 tons, 0,0 %
  Machinery: 200 tons, 54,1 %
  Hull, fittings & equipment: 97 tons, 26,2 %
  Fuel, ammunition & stores: 65 tons, 17,6 %
  Miscellaneous weights: 4 tons, 1,1 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    90 lbs / 41 Kg = 7,0 x 3,0 " / 75 mm shells or 0,1 torpedoes
  Stability (Unstable if below 1.00): 1,37
  Metacentric height 0,7 ft / 0,2 m
  Roll period: 9,4 seconds
  Steadiness   - As gun platform (Average = 50 %): 58 %
        - Recoil effect (Restricted arc if above 1.00): 0,09
  Seaboat quality  (Average = 1.00): 0,90

Hull form characteristics:
  Hull has raised forecastle
  Block coefficient: 0,416
  Length to Beam Ratio: 11,90 : 1
  'Natural speed' for length: 15,05 kts
  Power going to wave formation at top speed: 66 %
  Trim (Max stability = 0, Max steadiness = 100): 64
  Bow angle (Positive = bow angles forward): 30,00 degrees
  Stern overhang: 0,00 ft / 0,00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      13,12 ft / 4,00 m
     - Forecastle (20 %):   13,12 ft / 4,00 m (9,84 ft / 3,00 m aft of break)
     - Mid (30 %):      7,22 ft / 2,20 m
     - Quarterdeck (15 %):   6,89 ft / 2,10 m
     - Stern:      6,89 ft / 2,10 m
     - Average freeboard:   8,39 ft / 2,56 m
  Ship tends to be wet forward

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 182,3 %
     - Above water (accommodation/working, high = better): 59,7 %
  Waterplane Area: 2 679 Square feet or 249 Square metres
  Displacement factor (Displacement / loading): 39 %
  Structure weight / hull surface area: 18 lbs/sq ft or 86 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0,50
     - Longitudinal: 1,46
     - Overall: 0,55
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is cramped
  Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[hooper82]

10 In Service (TB-046 to TB-055)

Firinci (TR-46) Class Torpedo Boat, laid down 1912 - Design by Korpen
Displacement:575 t light; 594 t standard; 690 t normal; 767 t full load

Dimensions: Length overall / water x beam x draught
  229,66 ft / 229,66 ft x 22,97 ft x 9,84 ft (normal load)
  70,00 m / 70,00 m x 7,00 m  x 3,00 m

Armament:
     4 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1912 Model
    Breech loading guns in deck mounts
    on centreline ends, evenly spread, 2 raised mounts - superfiring
  Weight of broadside 51 lbs / 23 kg
  Shells per gun, main battery: 180
  3 - 17,7" / 450 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
  Main:   0,20" / 5 mm         -               -

Machinery:
  Coal and oil fired boilers, steam turbines,
  Direct drive, 2 shafts, 16 787 shp / 12 523 Kw = 29,00 kts
  Range 3 000nm at 12,00 kts
  Bunker at max displacement = 173 tons (90% coal)

Complement:
  66 - 87

Cost:
  £0,077 million / $0,308 million

Distribution of weights at normal displacement:
  Armament: 6 tons, 0,9 %
  Armour: 1 tons, 0,2 %
     - Belts: 0 tons, 0,0 %
     - Torpedo bulkhead: 0 tons, 0,0 %
     - Armament: 1 tons, 0,2 %
     - Armour Deck: 0 tons, 0,0 %
     - Conning Tower: 0 tons, 0,0 %
  Machinery: 368 tons, 53,4 %
  Hull, fittings & equipment: 186 tons, 27,0 %
  Fuel, ammunition & stores: 115 tons, 16,7 %
  Miscellaneous weights: 13 tons, 1,9 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    186 lbs / 84 Kg = 14,4 x 3,0 " / 75 mm shells or 0,2 torpedoes
  Stability (Unstable if below 1.00): 1,34
  Metacentric height 0,9 ft / 0,3 m
  Roll period: 10,0 seconds
  Steadiness   - As gun platform (Average = 50 %): 56 %
        - Recoil effect (Restricted arc if above 1.00): 0,15
  Seaboat quality  (Average = 1.00): 0,94

Hull form characteristics:
  Hull has a flush deck
  Block coefficient: 0,465
  Length to Beam Ratio: 10,00 : 1
  'Natural speed' for length: 15,15 kts
  Power going to wave formation at top speed: 72 %
  Trim (Max stability = 0, Max steadiness = 100): 60
  Bow angle (Positive = bow angles forward): 0,00 degrees
  Stern overhang: 0,00 ft / 0,00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      18,04 ft / 5,50 m
     - Forecastle (20 %):   13,12 ft / 4,00 m
     - Mid (50 %):      10,50 ft / 3,20 m
     - Quarterdeck (15 %):   9,84 ft / 3,00 m
     - Stern:      9,84 ft / 3,00 m
     - Average freeboard:   11,60 ft / 3,54 m

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 181,6 %
     - Above water (accommodation/working, high = better): 77,5 %
  Waterplane Area: 3 407 Square feet or 317 Square metres
  Displacement factor (Displacement / loading): 45 %
  Structure weight / hull surface area: 23 lbs/sq ft or 115 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0,50
     - Longitudinal: 3,25
     - Overall: 0,60
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is cramped
  Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[hooper82]

10 In Service (TB-057 to TB-066)

Köpek (TR-57) Class Torpedo Boat, laid down 1916 - Design by Korpen

Ten ships laid down 2/1915
TR57-TR66

Displacement:
  500 t light; 516 t standard; 599 t normal; 665 t full load

Dimensions: Length overall / water x beam x draught
  239,50 ft / 239,50 ft x 20,67 ft x 10,83 ft (normal load)
  73,00 m / 73,00 m x 6,30 m  x 3,30 m

Armament:
     3 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1916 Model
    Breech loading guns in deck mounts
    on centreline ends, majority aft, 2 raised mounts - superfiring
     2 - 0,31" / 8,0 mm guns in single mounts, 0,02lbs / 0,01kg shells, 1916 Model
    Machine guns in deck mounts
    on side, all amidships, all raised mounts - superfiring
  Weight of broadside 39 lbs / 18 kg
  Shells per gun, main battery: 200
  4 - 17,7" / 450 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
  Main:   0,35" / 9 mm         -               -

Machinery:
  Coal and oil fired boilers, steam turbines,
  Direct drive, 2 shafts, 17 320 shp / 12 920 Kw = 30,51 kts
  Range 3 230nm at 12,00 kts
  Bunker at max displacement = 148 tons (90% coal)

Complement:
  59 - 78

Cost:
  £0,109 million / $0,435 million

Distribution of weights at normal displacement:
  Armament: 5 tons, 0,8 %
  Armour: 2 tons, 0,3 %
     - Belts: 0 tons, 0,0 %
     - Torpedo bulkhead: 0 tons, 0,0 %
     - Armament: 2 tons, 0,3 %
     - Armour Deck: 0 tons, 0,0 %
     - Conning Tower: 0 tons, 0,0 %
  Machinery: 321 tons, 53,6 %
  Hull, fittings & equipment: 159 tons, 26,6 %
  Fuel, ammunition & stores: 99 tons, 16,5 %
  Miscellaneous weights: 14 tons, 2,3 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    124 lbs / 56 Kg = 9,6 x 3,0 " / 75 mm shells or 0,2 torpedoes
  Stability (Unstable if below 1.00): 1,15
  Metacentric height 0,6 ft / 0,2 m
  Roll period: 11,1 seconds
  Steadiness   - As gun platform (Average = 50 %): 60 %
        - Recoil effect (Restricted arc if above 1.00): 0,15
  Seaboat quality  (Average = 1.00): 0,92

Hull form characteristics:
  Hull has raised forecastle
  Block coefficient: 0,391
  Length to Beam Ratio: 11,59 : 1
  'Natural speed' for length: 15,48 kts
  Power going to wave formation at top speed: 68 %
  Trim (Max stability = 0, Max steadiness = 100): 65
  Bow angle (Positive = bow angles forward): 0,00 degrees
  Stern overhang: 0,00 ft / 0,00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      17,22 ft / 5,25 m
     - Forecastle (20 %):   16,40 ft / 5,00 m (8,20 ft / 2,50 m aft of break)
     - Mid (50 %):      8,20 ft / 2,50 m
     - Quarterdeck (15 %):   8,20 ft / 2,50 m
     - Stern:      9,19 ft / 2,80 m
     - Average freeboard:   9,98 ft / 3,04 m

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 181,9 %
     - Above water (accommodation/working, high = better): 48,5 %
  Waterplane Area: 3 033 Square feet or 282 Square metres
  Displacement factor (Displacement / loading): 41 %
  Structure weight / hull surface area: 22 lbs/sq ft or 107 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0,50
     - Longitudinal: 2,50
     - Overall: 0,58
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is extremely poor
  Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[hooper82]

7 In Service (TB-001 to TB-007)

Kolay (TB3) Class Torpedo Boat,  laid down 1916 - Design By sgdn

Displacement:
  415 t light; 433 t standard; 483 t normal; 524 t full load

Dimensions: Length overall / water x beam x draught
  229.66 ft / 229.66 ft x 19.69 ft x 9.84 ft (normal load)
  70.00 m / 70.00 m x 6.00 m  x 3.00 m

Armament:
     2 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1916 Model
    Breech loading guns in deck mounts
    on centreline, evenly spread
     4 - 0.49" / 12.5 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
    Machine guns in deck mounts
    on side, all amidships, all raised mounts - superfiring
  Weight of broadside 71 lbs / 32 kg
  Shells per gun, main battery: 200
  5 - 18.0" / 457.2 mm above water torpedoes

Machinery:
  Oil fired boilers, steam turbines,
  Direct drive, 2 shafts, 14,263 shp / 10,640 Kw = 30.00 kts
  Range 3,000nm at 12.00 kts
  Bunker at max displacement = 91 tons

Complement:
  50 - 66

Cost:
  £0.093 million / $0.373 million

Distribution of weights at normal displacement:
  Armament: 9 tons, 1.8 %
  Machinery: 250 tons, 51.7 %
  Hull, fittings & equipment: 151 tons, 31.3 %
  Fuel, ammunition & stores: 68 tons, 14.1 %
  Miscellaneous weights: 5 tons, 1.0 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    110 lbs / 50 Kg = 3.1 x 4.1 " / 105 mm shells or 0.1 torpedoes
  Stability (Unstable if below 1.00): 1.10
  Metacentric height 0.5 ft / 0.2 m
  Roll period: 11.4 seconds
  Steadiness   - As gun platform (Average = 50 %): 62 %
        - Recoil effect (Restricted arc if above 1.00): 0.30
  Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
  Hull has raised forecastle
  Block coefficient: 0.380
  Length to Beam Ratio: 11.67 : 1
  'Natural speed' for length: 15.15 kts
  Power going to wave formation at top speed: 68 %
  Trim (Max stability = 0, Max steadiness = 100): 61
  Bow angle (Positive = bow angles forward): 0.00 degrees
  Stern overhang: 0.00 ft / 0.00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      17.22 ft / 5.25 m
     - Forecastle (20 %):   16.40 ft / 5.00 m (8.20 ft / 2.50 m aft of break)
     - Mid (50 %):      8.20 ft / 2.50 m
     - Quarterdeck (15 %):   8.20 ft / 2.50 m
     - Stern:      9.19 ft / 2.80 m
     - Average freeboard:   9.98 ft / 3.04 m

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 182.5 %
     - Above water (accommodation/working, high = better): 37.9 %
  Waterplane Area: 2,756 Square feet or 256 Square metres
  Displacement factor (Displacement / loading): 42 %
  Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0.51
     - Longitudinal: 3.16
     - Overall: 0.62
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is extremely poor

236nm at 30 knts
Miscellaneous weights: 5 tons
5t torpedos
0t small radio[post 1913 build]

[hooper82]

10 In Service (GB-001 to GB-010)

Nasil Class Gun Boat, laid down 1888 - By Ithekro

Displacement:
  367 t light; 382 t standard; 400 t normal; 413 t full load

Dimensions: Length overall / water x beam x draught
  140.00 ft / 140.00 ft x 16.00 ft x 11.00 ft (normal load)
  42.67 m / 42.67 m x 4.88 m  x 3.35 m

Armament:
     2 - 2.95" / 75.0 mm guns in single mounts, 12.49lbs / 5.67kg shells, 1888 Model
    Quick firing guns in deck mounts
    on centreline, evenly spread
     2 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1888 Model
    Breech loading guns in deck mounts
    on side, all amidships
  Weight of broadside 25 lbs / 11 kg
  Shells per gun, main battery: 500

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
  Main:   1.00" / 25 mm         -               -

Machinery:
  Coal fired boilers, complex reciprocating steam engines,
  Direct drive, 1 shaft, 3,573 ihp / 2,665 Kw = 20.00 kts
  Range 800nm at 9.00 kts (Bunkerage = 32 tons)
    Caution: Delicate, lightweight machinery

Complement:
  44 - 58

Cost:
  £0.047 million / $0.189 million

Distribution of weights at normal displacement:
  Armament: 3 tons, 0.8 %
  Armour: 3 tons, 0.7 %
     - Belts: 0 tons, 0.0 %
     - Torpedo bulkhead: 0 tons, 0.0 %
     - Armament: 3 tons, 0.7 %
     - Armour Deck: 0 tons, 0.0 %
     - Conning Tower: 0 tons, 0.0 %
  Machinery: 227 tons, 56.8 %
  Hull, fittings & equipment: 133 tons, 33.2 %
  Fuel, ammunition & stores: 33 tons, 8.2 %
  Miscellaneous weights: 1 tons, 0.3 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    115 lbs / 52 Kg = 9.2 x 3.0 " / 75 mm shells or 0.1 torpedoes
  Stability (Unstable if below 1.00): 1.14
  Metacentric height 0.4 ft / 0.1 m
  Steadiness   - As gun platform (Average = 50 %): 70 %
        - Recoil effect (Restricted arc if above 1.00): 0.25
  Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
  Hull has a flush deck
  Block coefficient: 0.568
  Length to Beam Ratio: 8.75 : 1
  'Natural speed' for length: 11.83 kts
  Power going to wave formation at top speed: 71 %
  Trim (Max stability = 0, Max steadiness = 100): 57
  Bow angle (Positive = bow angles forward): 0.00 degrees
  Stern overhang: 0.00 ft / 0.00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      13.00 ft / 3.96 m
     - Forecastle (20 %):   9.00 ft / 2.74 m
     - Mid (50 %):      9.00 ft / 2.74 m
     - Quarterdeck (15 %):   9.00 ft / 2.74 m
     - Stern:      9.00 ft / 2.74 m
     - Average freeboard:   9.32 ft / 2.84 m
  Ship tends to be wet forward

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 190.8 %
     - Above water (accommodation/working, high = better): 61.9 %
  Waterplane Area: 1,590 Square feet or 148 Square metres
  Displacement factor (Displacement / loading): 29 %
  Structure weight / hull surface area: 30 lbs/sq ft or 145 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0.78
     - Longitudinal: 9.44
     - Overall: 1.00
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is cramped
  Ship has slow, easy roll, a good, steady gun platform
  Good seaboat, rides out heavy weather easily

[hooper82]

6 In Service (GB-011 to GB-016)

Oge Class Gun Boat, laid down 1916 - By sgdn

Displacement:
  648 t light; 677 t standard; 699 t normal; 717 t full load

Dimensions: Length overall / water x beam x draught
  180.45 ft / 180.45 ft x 19.69 ft (Bulges 26.25 ft) x 11.48 ft (normal load)
  55.00 m / 55.00 m x 6.00 m (Bulges 8.00 m)  x 3.50 m

Armament:
     2 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.97kg shells, 1916 Model
    Breech loading guns in deck mounts
    on centreline ends, evenly spread
     4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1916 Model
    Quick firing guns in deck mounts
    on side, evenly spread
     4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
    Machine guns in deck mounts
    on centreline, all amidships
  Weight of broadside 219 lbs / 99 kg
  Shells per gun, main battery: 110

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
  Main:   3.94" / 100 mm   114.83 ft / 35.00 m   7.87 ft / 2.40 m
  Ends:   1.97" / 50 mm     49.21 ft / 15.00 m   4.59 ft / 1.40 m
    16.40 ft / 5.00 m Unarmoured ends
    Main Belt covers 98 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
  Main:   1.97" / 50 mm         -               -
  2nd:   0.98" / 25 mm         -               -

  - Conning tower: 1.97" / 50 mm

Machinery:
  Oil fired boilers, steam turbines,
  Direct drive, 2 shafts, 3,514 shp / 2,622 Kw = 19.20 kts
  Range 1,500nm at 10.00 kts
  Bunker at max displacement = 41 tons

Complement:
  67 - 88

Cost:
  £0.105 million / $0.419 million

Distribution of weights at normal displacement:
  Armament: 27 tons, 3.9 %
  Armour: 188 tons, 26.8 %
     - Belts: 166 tons, 23.7 %
     - Torpedo bulkhead: 0 tons, 0.0 %
     - Armament: 18 tons, 2.6 %
     - Armour Deck: 0 tons, 0.0 %
     - Conning Tower: 3 tons, 0.5 %
  Machinery: 131 tons, 18.7 %
  Hull, fittings & equipment: 302 tons, 43.2 %
  Fuel, ammunition & stores: 51 tons, 7.3 %
  Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    883 lbs / 400 Kg = 10.5 x 5.5 " / 140 mm shells or 0.5 torpedoes
  Stability (Unstable if below 1.00): 1.08
  Metacentric height 0.5 ft / 0.2 m
  Roll period: 15.5 seconds
  Steadiness   - As gun platform (Average = 50 %): 94 %
        - Recoil effect (Restricted arc if above 1.00): 0.74
  Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
  Hull has raised forecastle
  Block coefficient: 0.450
  Length to Beam Ratio: 6.88 : 1
  'Natural speed' for length: 13.43 kts
  Power going to wave formation at top speed: 63 %
  Trim (Max stability = 0, Max steadiness = 100): 47
  Bow angle (Positive = bow angles forward): 0.00 degrees
  Stern overhang: 0.00 ft / 0.00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      14.76 ft / 4.50 m
     - Forecastle (20 %):   14.76 ft / 4.50 m (13.12 ft / 4.00 m aft of break)
     - Mid (50 %):      13.12 ft / 4.00 m
     - Quarterdeck (15 %):   13.12 ft / 4.00 m
     - Stern:      13.12 ft / 4.00 m
     - Average freeboard:   13.45 ft / 4.10 m
  Ship tends to be wet forward

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 90.7 %
     - Above water (accommodation/working, high = better): 84.5 %
  Waterplane Area: 2,266 Square feet or 210 Square metres
  Displacement factor (Displacement / loading): 105 %
  Structure weight / hull surface area: 38 lbs/sq ft or 185 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0.73
     - Longitudinal: 16.08
     - Overall: 1.00
  Hull space for machinery, storage, compartmentation is adequate
  Room for accommodation and workspaces is cramped
  Ship has slow, easy roll, a good, steady gun platform
  Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[hooper82]

2 In Service (GB-017 & GB-018)

Ex-Caliphate Gun Boats

Na'am Class Gun Boat, laid down 1895

Displacement:
822 t light; 869 t standard; 1,000 t normal; 1,105 t full load

Dimensions: Length overall / water x beam x draught
150.00 ft / 150.00 ft x 30.00 ft x 12.00 ft (normal load)
45.72 m / 45.72 m x 9.14 m x 3.66 m

Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1895 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
6 - 3.00" / 76.2 mm guns (4 mounts), 13.50lbs / 6.12kg shells, 1895 Model
Quick firing guns in deck mounts
on side, all amidships
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1895 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 298 lbs / 135 kg
Shells per gun, main battery: 150
4 - 18.0" / 457.2 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 97.50 ft / 29.72 m 6.57 ft / 2.00 m
Ends: 2.00" / 51 mm 52.48 ft / 16.00 m 6.57 ft / 2.00 m
Upper: 2.00" / 51 mm 97.50 ft / 29.72 m 8.00 ft / 2.44 m
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm - -
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 1,015 ihp / 757 Kw = 12.75 kts
Range 8,000nm at 7.00 kts
Bunker at max displacement = 235 tons (100% coal)

Complement:
88 - 115

Cost:
£0.084 million / $0.336 million

Distribution of weights at normal displacement:
Armament: 37 tons, 3.7 %
Armour: 347 tons, 34.7 %
- Belts: 183 tons, 18.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 2.4 %
- Armour Deck: 127 tons, 12.7 %
- Conning Tower: 13 tons, 1.3 %
Machinery: 172 tons, 17.2 %
Hull, fittings & equipment: 266 tons, 26.6 %
Fuel, ammunition & stores: 178 tons, 17.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,327 lbs / 602 Kg = 12.3 x 6.0 " / 152 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.648
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 12.25 kts
Power going to wave formation at top speed: 57 %
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 (% = measuring location as a percentage of overall length):
- Stem: 17.00 ft / 5.18 m
- Forecastle (20 %): 11.00 ft / 3.35 m
- Mid (50 %): 11.00 ft / 3.35 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 11.48 ft / 3.50 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85.2 %
- Above water (accommodation/working, high = better): 45.1 %
Waterplane Area: 3,441 Square feet or 320 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 45 lbs/sq ft or 218 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.62
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather