WesWorld

Escort vessels, Gunboats, Sloops, etc

C61, Iberia Gunboat laid down 1929

C61
C62
C63
C64
C65
C66
C67
C68
C69
C70
C71
C72
C73
C74
C75
C76
C77
C78
C79
C80
C81
C82
C83
C84
C85
C86
C87
C88
C89
C90
C91
C92

Displacement:
1,844 t light; 1,939 t standard; 2,435 t normal; 2,832 t full load

Dimensions: Length overall / water x beam x draught
340.88 ft / 311.68 ft x 39.37 ft x 11.81 ft (normal load)
103.90 m / 95.00 m x 12.00 m x 3.60 m

Armament:
6 - 5.12" / 130 mm guns (2x3 guns), 67.03lbs / 30.40kg shells, 1929 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, evenly spread
6 - 2.24" / 57.0 mm guns (2x3 guns), 5.65lbs / 2.56kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 0.98" / 25.0 mm guns (4x2 guns), 0.48lbs / 0.22kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.53" / 13.5 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread, 6 raised mounts
Weight of broadside 441 lbs / 200 kg
Shells per gun, main battery: 180

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 173.88 ft / 53.00 m 8.20 ft / 2.50 m
Ends: Unarmoured
Main Belt covers 86 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.36" / 60 mm 1.18" / 30 mm 1.57" / 40 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm
3rd: 0.79" / 20 mm 0.79" / 20 mm -
4th: 0.79" / 20 mm 0.79" / 20 mm -

- Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 15,628 shp / 11,659 Kw = 24.00 kts
Range 8,500nm at 15.00 kts
Bunker at max displacement = 893 tons

Complement:
173 - 225

Cost:
£0.712 million / $2.848 million

Distribution of weights at normal displacement:
Armament: 55 tons, 2.3 %
Armour: 199 tons, 8.2 %
- Belts: 124 tons, 5.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 68 tons, 2.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 8 tons, 0.3 %
Machinery: 480 tons, 19.7 %
Hull, fittings & equipment: 1,035 tons, 42.5 %
Fuel, ammunition & stores: 591 tons, 24.3 %
Miscellaneous weights: 75 tons, 3.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,081 lbs / 1,851 Kg = 60.9 x 5.1 " / 130 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.7 ft / 0.5 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.56

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.588
Length to Beam Ratio: 7.92 : 1
'Natural speed' for length: 17.65 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 45.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.92 ft / 7.90 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 14.93 ft / 4.55 m
- Quarterdeck (15 %): 14.93 ft / 4.55 m
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 17.45 ft / 5.32 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85.7 %
- Above water (accommodation/working, high = better): 156.6 %
Waterplane Area: 8,874 Square feet or 824 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 63 lbs/sq ft or 307 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.19
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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

Diesels for cruise, Turbines for sprint
60 Depth Charges carried

C93, Iberia Sloop laid down 1931

C93
C94
C95
C96
C97
C98
C99
C100
C101
C102
C103
C104
C105
C106
C107
C108
C109
C110
C111
C112

Displacement:
1,240 t light; 1,305 t standard; 1,554 t normal; 1,753 t full load

Dimensions: Length overall / water x beam x draught
292.57 ft / 278.87 ft x 31.99 ft x 11.48 ft (normal load)
89.18 m / 85.00 m x 9.75 m x 3.50 m

Armament:
4 - 5.12" / 130 mm guns (2x2 guns), 67.03lbs / 30.40kg shells, 1931 Model
Breech loading guns in deck mounts with hoists
on centreline, all forward, 1 raised mount - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on centreline, all aft, 1 raised mount - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
8 - 0.98" / 25.0 mm guns (4x2 guns), 0.48lbs / 0.22kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 317 lbs / 144 kg
Shells per gun, main battery: 180

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.98" / 25 mm 184.71 ft / 56.30 m 6.56 ft / 2.00 m
Ends: Unarmoured
Main Belt covers 102 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.98" / 25 mm -
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.79" / 20 mm 0.79" / 20 mm -
4th: 0.79" / 20 mm 0.79" / 20 mm -

- Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 11,876 shp / 8,859 Kw = 24.00 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 447 tons

Complement:
123 - 160

Cost:
£0.552 million / $2.207 million

Distribution of weights at normal displacement:
Armament: 40 tons, 2.6 %
Armour: 85 tons, 5.5 %
- Belts: 50 tons, 3.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 30 tons, 1.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.4 %
Machinery: 355 tons, 22.9 %
Hull, fittings & equipment: 660 tons, 42.5 %
Fuel, ammunition & stores: 314 tons, 20.2 %
Miscellaneous weights: 100 tons, 6.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,897 lbs / 860 Kg = 28.3 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.9 ft / 0.3 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.531
Length to Beam Ratio: 8.72 : 1
'Natural speed' for length: 16.70 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 17.06 ft / 5.20 m
- Mid (59 %): 16.40 ft / 5.00 m (8.20 ft / 2.50 m aft of break)
- Quarterdeck (15 %): 8.20 ft / 2.50 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 13.38 ft / 4.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.6 %
- Above water (accommodation/working, high = better): 126.2 %
Waterplane Area: 6,116 Square feet or 568 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 58 lbs/sq ft or 281 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.87
- Longitudinal: 3.43
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

80 Depth Charges carried

C25, Iberia Gunboat laid down 1925

C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C35
C36
C37
C38
C39
C40
C41
C42
C43
C44
C45
C46
C47
C48
C49
C50
C51
C52
C53
C54
C55
C56
C57
C58
C59
C60

Displacement:
1,878 t light; 1,966 t standard; 2,496 t normal; 2,920 t full load

Dimensions: Length overall / water x beam x draught
340.88 ft / 311.68 ft x 39.37 ft x 11.48 ft (normal load)
103.90 m / 95.00 m x 12.00 m x 3.50 m

Armament:
6 - 5.12" / 130 mm guns (2x3 guns), 67.03lbs / 30.40kg shells, 1925 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, evenly spread
6 - 2.24" / 57.0 mm guns (2x3 guns), 5.65lbs / 2.56kg shells, 1925 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
12 - 0.53" / 13.5 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1925 Model
Machine guns in deck mounts
on side, evenly spread
8 - 0.53" / 13.5 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1925 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 438 lbs / 199 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 188.98 ft / 57.60 m 7.58 ft / 2.31 m
Ends: Unarmoured
Main Belt covers 93 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.36" / 60 mm 1.18" / 30 mm 1.18" / 30 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm

- Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 3 shafts, 16,152 shp / 12,050 Kw = 24.00 kts
Range 8,500nm at 15.00 kts
Bunker at max displacement = 955 tons

Complement:
176 - 229

Cost:
£0.606 million / $2.423 million

Distribution of weights at normal displacement:
Armament: 55 tons, 2.2 %
Armour: 183 tons, 7.3 %
- Belts: 122 tons, 4.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 55 tons, 2.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.3 %
Machinery: 524 tons, 21.0 %
Hull, fittings & equipment: 1,040 tons, 41.7 %
Fuel, ammunition & stores: 618 tons, 24.8 %
Miscellaneous weights: 75 tons, 3.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,068 lbs / 1,845 Kg = 60.7 x 5.1 " / 130 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.7 ft / 0.5 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.620
Length to Beam Ratio: 7.92 : 1
'Natural speed' for length: 17.65 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 45.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.92 ft / 7.90 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 14.93 ft / 4.55 m
- Quarterdeck (15 %): 14.93 ft / 4.55 m
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 17.45 ft / 5.32 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.9 %
- Above water (accommodation/working, high = better): 158.6 %
Waterplane Area: 9,143 Square feet or 849 Square metres
Displacement factor (Displacement / loading): 143 %
Structure weight / hull surface area: 62 lbs/sq ft or 305 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.06
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Diesels on center screw, Turbines on outer ones for sprint

C1, Iberia PG laid down 1913

C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12

Displacement:
1,123 t light; 1,170 t standard; 1,373 t normal; 1,531 t full load
Loading submergence 170 tons/feet

Dimensions:
246.06 ft x 36.09 ft x 9.84 ft (normal load)
75.00 m x 11.00 m x 3.00 m

Armament:
4 - 3.94" / 100 mm guns
8 - 2.24" / 57 mm guns
Secondary guns mounted low & subject to being washed down in a seaway
12 - 2.24" / 57 mm guns
Weight of broadside 235 lbs / 107 kg
5 - 18.9" / 480 mm submerged torpedo tubes

Armour:
Belt 1.18" / 30 mm, upper belt 0.79" / 20 mm, end belts 0.79" / 20 mm
Belts cover 93 % of normal area
Main gun shields 0.79" / 20 mm, 2nd casemates 0.79" / 20 mm
Armour deck 0.79" / 20 mm, Conning tower 0.79" / 20 mm

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 3,776 ihp / 2,817 Kw = 18.00 kts
Range 8,000nm at 10.00 kts

Complement:
112 - 146

Cost:
£0.104 million / $0.418 million

Distribution of weights at normal displacement:
Armament: 29 tons, 2.1 %
Armour: 208 tons, 15.1 %
Belts: 111 tons, 8.1 %, Armament: 8 tons, 0.6 %, Armour Deck: 87 tons, 6.3 %
Conning Tower: 2 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 227 tons, 16.5 %
Hull, fittings & equipment: 639 tons, 46.5 %
Fuel, ammunition & stores: 251 tons, 18.2 %
Miscellaneous weights: 20 tons, 1.5 %

Metacentric height 1.7

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.28
Shellfire needed to sink: 2,042 lbs / 926 Kg = 66.9 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.6
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.15
Relative quality as seaboat: 1.36

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.77
'Natural speed' for length: 15.69 kts
Power going to wave formation at top speed: 54 %
Trim: 51
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 92.0 %
Relative accommodation and working space: 116.2 %
(Average = 100%)
Displacement factor: 150 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.27
(Structure weight / hull surface area: 69 lbs / square foot or 339 Kg / square metre)
Relative longitudinal hull strength: 2.78
(for 11.48 ft / 3.50 m average freeboard, freeboard adjustment 1.30 ft)
Relative composite hull strength: 1.37

C 13, Iberia Gunboat laid down 1922

C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24

Displacement:
1,932 t light; 2,019 t standard; 2,547 t normal; 2,959 t full load
Loading submergence 246 tons/feet

Dimensions:
301.84 ft x 45.93 ft x 13.12 ft (normal load)
92.00 m x 14.00 m x 4.00 m

Armament:
6 - 2.24" / 57 mm guns (2 Main turrets x 3 guns, 2 superfiring turrets)
6 - 5.12" / 130 mm guns (2 2nd turrets x 3 guns)
8 - 0.53" / 14 mm guns
Weight of broadside 437 lbs / 198 kg

Armour:
Belt 1.57" / 40 mm, ends unarmoured
Belts cover 92 % of normal area
Main turrets 20.00" / 508 mm, 2nd turrets 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 15,985 shp / 11,925 Kw = 24.00 kts
Range 8,000nm at 15.00 kts

Complement:
179 - 233

Cost:
£0.516 million / $2.066 million

Distribution of weights at normal displacement:
Armament: 55 tons, 2.1 %
Armour: 498 tons, 19.6 %
Belts: 100 tons, 3.9 %, Armament: 399 tons, 15.7 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 542 tons, 21.3 %
Hull, fittings & equipment: 712 tons, 27.9 %
Fuel, ammunition & stores: 615 tons, 24.2 %
Miscellaneous weights: 125 tons, 4.9 %

Metacentric height 1.4

Remarks:
Caution: Poor stability - excessive risk of capsizing
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 0.93
Shellfire needed to sink: 1,570 lbs / 712 Kg = 277.8 x 2.2 " / 57 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.8
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 59 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.40
Relative quality as seaboat: 1.02

Hull form characteristics:
Block coefficient: 0.490
Sharpness coefficient: 0.38
Hull speed coefficient 'M': 6.76
'Natural speed' for length: 17.37 kts
Power going to wave formation at top speed: 63 %
Trim: 58
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 91.4 %
Relative accommodation and working space: 151.6 %
(Average = 100%)
Displacement factor: 119 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.51
(Structure weight / hull surface area: 50 lbs / square foot or 242 Kg / square metre)
Relative longitudinal hull strength: 1.54
(for 16.57 ft / 5.05 m average freeboard, freeboard adjustment 5.05 ft)
Relative composite hull strength: 0.57

misc weight is for combined propulsion and ASW gear