A coastal minelayer/sweeper of the Orange Navy - equipped with some experimental oil-firing boilers. Dated 1906. ONly one built.
The standard coal-fired version has 3000nm range and 80t misc. weight.
Displacement:
500 t light; 517 t standard; 587 t normal; 643 t full load
Dimensions: Length overall / water x beam x draught
223.10 ft / 223.10 ft x 27.89 ft x 5.91 ft (normal load)
68.00 m / 68.00 m x 8.50 m x 1.80 m
Armament:
2 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1904 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
2 - 0.39" / 10.0 mm guns in single mounts, 0.03lbs / 0.01kg shells, 1904 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 61 lbs / 28 kg
Shells per gun, main battery: 150
Machinery:
Oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 1,150 ihp / 858 Kw = 15.00 kts
Range 4,000nm at 10.00 kts
Bunker at max displacement = 126 tons
Complement:
59 - 77
Cost:
£0.045 million / $0.181 million
Distribution of weights at normal displacement:
Armament: 8 tons, 1.3 %
Machinery: 151 tons, 25.8 %
Hull, fittings & equipment: 243 tons, 41.4 %
Fuel, ammunition & stores: 87 tons, 14.8 %
Miscellaneous weights: 98 tons, 16.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
838 lbs / 380 Kg = 27.5 x 3.9 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.2 ft / 0.4 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.559
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 14.94 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 37
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: 15.94 ft / 4.86 m
- Forecastle (20 %): 14.76 ft / 4.50 m (10.14 ft / 3.09 m aft of break)
- Mid (50 %): 10.14 ft / 3.09 m
- Quarterdeck (15 %): 10.14 ft / 3.09 m
- Stern: 10.14 ft / 3.09 m
- Average freeboard: 11.16 ft / 3.40 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 112.0 %
- Above water (accommodation/working, high = better): 143.3 %
Waterplane Area: 4,379 Square feet or 407 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 34 lbs/sq ft or 165 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.63
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
A small boat intended for coastal patrol, rescue and secondary mine laying and sweeping duties. Range requirement is determined by unrefuelled range on a two-way travel between main Orange ports at 12kts - or between Luanda and Walvis bay at reduced speed.
Orange patrol boat laid down 1908 (Engine 1909)
Displacement:
200 t light; 206 t standard; 244 t normal; 274 t full load
Dimensions: Length overall / water x beam x draught
120.00 ft / 120.00 ft x 20.00 ft x 6.00 ft (normal load)
36.58 m / 36.58 m x 6.10 m x 1.83 m
Armament:
1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1908 Model
Breech loading gun in deck mount
on centreline aft
2 - 0.40" / 10.2 mm guns in single mounts, 0.03lbs / 0.01kg shells, 1908 Model
Breech loading guns in deck mounts
on side, all amidships, 1 raised mount
Weight of broadside 14 lbs / 6 kg
Shells per gun, main battery: 150
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 1 shaft, 1,159 shp / 865 Kw = 16.00 kts
Range 1,500nm at 12.00 kts
Bunker at max displacement = 68 tons (100% coal)
Complement:
30 - 40
Cost:
£0.017 million / $0.066 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0.7 %
Machinery: 58 tons, 23.7 %
Hull, fittings & equipment: 89 tons, 36.3 %
Fuel, ammunition & stores: 44 tons, 18.0 %
Miscellaneous weights: 52 tons, 21.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
332 lbs / 151 Kg = 24.6 x 3.0 " / 76 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 0.5 ft / 0.2 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.09
Seaboat quality (Average = 1.00): 1.63
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.593
Length to Beam Ratio: 6.00 : 1
'Natural speed' for length: 10.95 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 43
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: 14.00 ft / 4.27 m
- Forecastle (20 %): 14.00 ft / 4.27 m
- Mid (45 %): 14.00 ft / 4.27 m (7.00 ft / 2.13 m aft of break)
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 10.15 ft / 3.09 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105.8 %
- Above water (accommodation/working, high = better): 104.9 %
Waterplane Area: 1,704 Square feet or 158 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.77
- Longitudinal: 9.80
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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
River GB, Orange River GB laid down 1904
5 build
Displacement:
96 t light; 99 t standard; 103 t normal; 106 t full load
Dimensions: Length overall / water x beam x draught
104,99 ft / 104,99 ft x 16,40 ft x 2,62 ft (normal load)
32,00 m / 32,00 m x 5,00 m x 0,80 m
Armament:
2 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1904 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
3 - 0,39" / 10,0 mm guns (2 mounts), 0,03lbs / 0,01kg shells, 1904 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 26 lbs / 12 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0,79" / 20 mm 104,99 ft / 32,00 m 5,91 ft / 1,80 m
Ends: Unarmoured
Main Belt covers 154% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,39" / 10 mm - -
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 177 ihp / 132 Kw = 11,00 kts
Range 300nm at 10,00 kts
Bunker at max displacement = 7 tons (100% coal)
Complement:
16 - 21
Cost:
£0,010 million / $0,039 million
Distribution of weights at normal displacement:
Armament: 3 tons, 3,1%
Armour: 19 tons, 18,7%
- Belts: 18 tons, 17,5%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 1 tons, 1,1%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 26 tons, 25,3%
Hull, fittings & equipment: 45 tons, 43,9%
Fuel, ammunition & stores: 7 tons, 7,0%
Miscellaneous weights: 2 tons, 1,9%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
181 lbs / 82 Kg = 14,1 x 3,0 " / 75 mm shells or 0,2 torpedoes
Stability (Unstable if below 1.00): 1,20
Metacentric height 0,5 ft / 0,1 m
Roll period: 10,1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0,32
Seaboat quality (Average = 1.00): 1,78
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,798
Length to Beam Ratio: 6,40 : 1
'Natural speed' for length: 10,25 kts
Power going to wave formation at top speed: 50 %
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: 6,56 ft / 2,00 m
- Forecastle (20%): 6,56 ft / 2,00 m
- Mid (50%): 6,56 ft / 2,00 m
- Quarterdeck (15%): 6,56 ft / 2,00 m
- Stern: 6,56 ft / 2,00 m
- Average freeboard: 6,56 ft / 2,00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 107,8%
- Above water (accommodation/working, high = better): 117,4%
Waterplane Area: 1.503 Square feet or 140 Square metres
Displacement factor (Displacement / loading): 104%
Structure weight / hull surface area: 20 lbs/sq ft or 99 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,86
- Longitudinal: 3,73
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
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
250 t Patrol Boat, Orange Patrol Boat laid down 1913 (Engine 1912)
10 ships in class
Displacement:
250 t light; 258 t standard; 332 t normal; 391 t full load
Dimensions: Length overall / water x beam x draught
150,00 ft / 150,00 ft x 21,00 ft x 7,00 ft (normal load)
45,72 m / 45,72 m x 6,40 m x 2,13 m
Armament:
1 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1913 Model
Breech loading gun in deck mount
on centreline aft
2 - 0,36" / 9,2 mm guns (1x2 guns), 0,02lbs / 0,01kg shells, 1913 Model
Breech loading guns in deck mount
on centreline
Weight of broadside 14 lbs / 6 kg
Shells per gun, main battery: 100
2 - 18,0" / 457,2 mm above water torpedoes
Machinery:
Coal fired boilers, complex reciprocating steam engines,
No drive to shaft, 2 shafts, 1.170 ihp / 873 Kw = 16,00 kts
Range 3.000nm at 12,00 kts
Bunker at max displacement = 134 tons (100% coal)
Complement:
38 - 50
Cost:
£0,023 million / $0,092 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0,5%
Machinery: 77 tons, 23,3%
Hull, fittings & equipment: 119 tons, 35,9%
Fuel, ammunition & stores: 82 tons, 24,6%
Miscellaneous weights: 52 tons, 15,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
513 lbs / 233 Kg = 38,0 x 3,0 " / 76 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,16
Metacentric height 0,6 ft / 0,2 m
Roll period: 11,1 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0,07
Seaboat quality (Average = 1.00): 2,00
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0,527
Length to Beam Ratio: 7,14 : 1
'Natural speed' for length: 12,25 kts
Power going to wave formation at top speed: 59 %
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 (% = measuring location as a percentage of overall length):
- Stem: 14,00 ft / 4,27 m
- Forecastle (20%): 14,00 ft / 4,27 m
- Mid (45%): 14,00 ft / 4,27 m (7,00 ft / 2,13 m aft of break)
- Quarterdeck (15%): 7,00 ft / 2,13 m
- Stern: 7,00 ft / 2,13 m
- Average freeboard: 10,15 ft / 3,09 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97,0%
- Above water (accommodation/working, high = better): 70,9%
Waterplane Area: 2.152 Square feet or 200 Square metres
Displacement factor (Displacement / loading): 151%
Structure weight / hull surface area: 27 lbs/sq ft or 130 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,81
- Longitudinal: 6,38
- 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
PB, Orange Sloop laid down 1913 (Engine 1912)
10 ships in class
Displacement:
999 t light; 1.041 t standard; 1.228 t normal; 1.378 t full load
Dimensions: Length overall / water x beam x draught
229,00 ft / 229,00 ft x 33,00 ft x 12,00 ft (normal load)
69,80 m / 69,80 m x 10,06 m x 3,66 m
Armament:
2 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1913 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
2 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1913 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
4 - 0,40" / 10,2 mm guns (2x2 guns), 0,03lbs / 0,01kg shells, 1913 Model
Quick firing guns in deck mounts
on side, all amidships
Weight of broadside 243 lbs / 110 kg
Shells per gun, main battery: 120
2 - 21,0" / 533,4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,00" / 25 mm 133,00 ft / 40,54 m 10,00 ft / 3,05 m
Ends: Unarmoured
Main Belt covers 89% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,00" / 25 mm - -
2nd: 1,00" / 25 mm - -
- Armour deck: 1,00" / 25 mm, Conning tower: 2,00" / 51 mm
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 2 shafts, 5.320 shp / 3.969 Kw = 20,00 kts
Range 4.000nm at 12,00 kts
Bunker at max displacement = 337 tons (100% coal)
Complement:
103 - 134
Cost:
£0,102 million / $0,407 million
Distribution of weights at normal displacement:
Armament: 30 tons, 2,5%
Armour: 165 tons, 13,4%
- Belts: 59 tons, 4,8%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 10 tons, 0,8%
- Armour Deck: 91 tons, 7,4%
- Conning Tower: 5 tons, 0,4%
Machinery: 233 tons, 19,0%
Hull, fittings & equipment: 483 tons, 39,3%
Fuel, ammunition & stores: 229 tons, 18,6%
Miscellaneous weights: 88 tons, 7,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1.761 lbs / 799 Kg = 16,3 x 6,0 " / 152 mm shells or 0,7 torpedoes
Stability (Unstable if below 1.00): 1,14
Metacentric height 1,2 ft / 0,4 m
Roll period: 12,6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,52
Seaboat quality (Average = 1.00): 1,61
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0,474
Length to Beam Ratio: 6,94 : 1
'Natural speed' for length: 15,13 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 44
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: 19,00 ft / 5,79 m
- Forecastle (20%): 18,00 ft / 5,49 m
- Mid (31%): 18,00 ft / 5,49 m (11,00 ft / 3,35 m aft of break)
- Quarterdeck (15%): 11,00 ft / 3,35 m
- Stern: 11,00 ft / 3,35 m
- Average freeboard: 13,25 ft / 4,04 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88,7%
- Above water (accommodation/working, high = better): 90,6%
Waterplane Area: 4.919 Square feet or 457 Square metres
Displacement factor (Displacement / loading): 128%
Structure weight / hull surface area: 53 lbs/sq ft or 258 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,84
- Longitudinal: 4,68
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
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
250 t Patrol Boat, Orange Patrol Boat laid down 1904 (Engine 1900)
12 ships in service
Displacement:
250 t light; 257 t standard; 332 t normal; 392 t full load
Dimensions: Length overall / water x beam x draught
150,00 ft / 150,00 ft x 21,00 ft x 7,00 ft (normal load)
45,72 m / 45,72 m x 6,40 m x 2,13 m
Armament:
1 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1904 Model
Breech loading gun in deck mount
on centreline forward
1 - 1,46" / 37,0 mm guns in single mounts, 1,55lbs / 0,70kg shells, 1904 Model
Breech loading gun in deck mount
on centreline aft
2 - 0,40" / 10,2 mm guns in single mounts, 0,03lbs / 0,01kg shells, 1904 Model
Breech loading guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 15 lbs / 7 kg
Shells per gun, main battery: 100
2 - 15,7" / 400 mm above water torpedoes
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 742 ihp / 554 Kw = 14,30 kts
Range 3.200nm at 11,00 kts
Bunker at max displacement = 135 tons (100% coal)
Complement:
38 - 50
Cost:
£0,027 million / $0,106 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0,6%
Machinery: 116 tons, 34,9%
Hull, fittings & equipment: 119 tons, 35,8%
Fuel, ammunition & stores: 82 tons, 24,8%
Miscellaneous weights: 13 tons, 3,9%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
365 lbs / 166 Kg = 27,0 x 3,0 " / 76 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,37
Metacentric height 0,8 ft / 0,3 m
Roll period: 9,6 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0,07
Seaboat quality (Average = 1.00): 2,00
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0,527
Length to Beam Ratio: 7,14 : 1
'Natural speed' for length: 12,25 kts
Power going to wave formation at top speed: 53 %
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 (% = measuring location as a percentage of overall length):
- Stem: 14,00 ft / 4,27 m
- Forecastle (20%): 14,00 ft / 4,27 m
- Mid (45%): 14,00 ft / 4,27 m (7,00 ft / 2,13 m aft of break)
- Quarterdeck (15%): 7,00 ft / 2,13 m
- Stern: 7,00 ft / 2,13 m
- Average freeboard: 10,15 ft / 3,09 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 122,0%
- Above water (accommodation/working, high = better): 78,8%
Waterplane Area: 2.152 Square feet or 200 Square metres
Displacement factor (Displacement / loading): 128%
Structure weight / hull surface area: 27 lbs/sq ft or 130 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,81
- Longitudinal: 6,37
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
13 t misc
10 t — short range Radio
3 t — Torpedos and Tubes
200t patrol vessel 1918d, Orange Kutter laid down 1917/18/19 (Engine 1916)
ships entered service in:
| Type | 1918/H1 | 1918/H2 | 1919/H1 | 1919/H2 | 1920/H1 | total | in service by 1919H2 |
| a) Leader | - | - | - | - | 5 | 5 | 0 |
| b) Patrol Boat | - | - | - | - | 20 | 20 | 0 |
| c) Minesweeper | 5 | 5 | 10 | 10 | 10 | 40 | 30 |
| d) Mine-Layer | 5 | 5 | 5 | 5 | 5 | 25 | 20 |
Displacement:
200 t light; 208 t standard; 253 t normal; 288 t full load
Dimensions: Length overall / water x beam x draught
139,44 ft / 137,80 ft x 19,69 ft x 6,27 ft (normal load)
42,50 m / 42,00 m x 6,00 m x 1,91 m
Armament:
1 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1914 Model
Quick firing gun in deck mount
on centreline forward
1 - 1,00" / 25,4 mm guns in single mounts, 0,50lbs / 0,23kg shells, 1918 Model
Anti-aircraft gun in deck mount
on centreline aft
2 - 0,50" / 12,7 mm guns in single mounts, 0,06lbs / 0,03kg shells, 1918 Model
Machine guns in deck mounts
on centreline ends, evenly spread, all raised mounts
Weight of broadside 14 lbs / 6 kg
Shells per gun, main battery: 400
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,59" / 15 mm - -
2nd: 0,39" / 10 mm - -
3rd: 0,31" / 8 mm - -
- Conning tower: 0,79" / 20 mm
Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 1 shaft, 900 ihp / 672 Kw = 15,50 kts
Range 3.250nm at 10,50 kts
Bunker at max displacement = 80 tons (90% coal)
Complement:
31 - 41
Cost:
£0,033 million / $0,133 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0,7%
Armour: 2 tons, 0,7%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 1 tons, 0,4%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 1 tons, 0,3%
Machinery: 58 tons, 23,1%
Hull, fittings & equipment: 83 tons, 32,9%
Fuel, ammunition & stores: 53 tons, 20,8%
Miscellaneous weights: 55 tons, 21,8%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
300 lbs / 136 Kg = 22,3 x 3,0 " / 76 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,14
Metacentric height 0,6 ft / 0,2 m
Roll period: 11,0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,07
Seaboat quality (Average = 1.00): 1,67
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0,520
Length to Beam Ratio: 7,00 : 1
'Natural speed' for length: 11,74 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 1,64 ft / 0,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13,12 ft / 4,00 m
- Forecastle (20%): 11,15 ft / 3,40 m (7,55 ft / 2,30 m aft of break)
- Mid (50%): 7,22 ft / 2,20 m
- Quarterdeck (15%): 7,22 ft / 2,20 m
- Stern: 8,20 ft / 2,50 m
- Average freeboard: 8,29 ft / 2,53 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105,1%
- Above water (accommodation/working, high = better): 79,6%
Waterplane Area: 1.776 Square feet or 165 Square metres
Displacement factor (Displacement / loading): 135%
Structure weight / hull surface area: 25 lbs/sq ft or 121 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,85
- Longitudinal: 4,13
- 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
4 variants (55 t misc)
a) Leader: 25 t long-range-Radio, 25 t hydrophones(not yet availble), 5 t command facilities
b) Patrol boat: 10 t short-range-Radio, 25 t hydrophones(not yet availble), 5 t two depth-charge throwers and hoists, 15 t depth-charges (30?)
c) Minesweeper: 25 t long-range-Radio, 20 t mine-sweeping gear, 10 t crew comfort
d) Mine-layer: same as c), but with 20 t of mines instead