WesWorld

Escort Ships will appear here once built.

Senshi, Japan LRMPS (Long Range Multi Purpose Ship) laid down 1930

Displacement:
1,927 t light; 2,105 t standard; 3,099 t normal; 3,895 t full load

Dimensions: Length overall / water x beam x draught
410.39 ft / 400.00 ft x 50.00 ft x 12.00 ft (normal load)
125.09 m / 121.92 m x 15.24 m x 3.66 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 65.00lbs / 29.48kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.00lbs / 5.44kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
8 - 1.57" / 40.0 mm guns (2x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
48 - 0.52" / 13.2 mm guns (15 mounts), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mounts (see notes)
on side, evenly spread, 24 raised guns
Weight of broadside 643 lbs / 292 kg
Shells per gun, main battery: 300

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.50" / 89 mm 240.00 ft / 73.15 m 8.49 ft / 2.59 m
Ends: Unarmoured
Main Belt covers 92 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 0.50" / 13 mm 0.50" / 13 mm -

- Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 13,300 shp / 9,922 Kw = 24.04 kts
Range 11,060nm at 18.00 kts
Bunker at max displacement = 1,789 tons

Complement:
207 - 270

Cost:
£0.809 million / $3.238 million

Distribution of weights at normal displacement:
Armament: 83 tons, 2.7 %
Armour: 647 tons, 20.9 %
- Belts: 307 tons, 9.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 81 tons, 2.6 %
- Armour Deck: 246 tons, 7.9 %
- Conning Tower: 14 tons, 0.4 %
Machinery: 403 tons, 13.0 %
Hull, fittings & equipment: 694 tons, 22.4 %
Fuel, ammunition & stores: 1,173 tons, 37.8 %
Miscellaneous weights: 100 tons, 3.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,145 lbs / 1,426 Kg = 46.9 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.6 ft / 0.8 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.452
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 23.40 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 80
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.00 ft / 5.49 m
- Forecastle (29 %): 12.00 ft / 3.66 m
- Mid (57 %): 12.00 ft / 3.66 m
- Quarterdeck (19 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 12.70 ft / 3.87 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 69.3 %
- Above water (accommodation/working, high = better): 146.6 %
Waterplane Area: 13,274 Square feet or 1,233 Square metres
Displacement factor (Displacement / loading): 140 %
Structure weight / hull surface area: 38 lbs/sq ft or 187 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 0.67
- Overall: 0.52
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

- Semi-automatic loading system for 13cm and 7.5cm guns.
- 13.2mm mounts: 3 fixed octuple mounts. 1 on forward section of superstructure, superfiring forward main guns, 1 on aft section of superstructure, superfiring aft main guns and 1 on the stern. 6x2 mounts aft (3 on each side), 6x2 forward (3 each side). Twins on simple pedestal mounts and equipped with simple shields. Octuples are weatherproof. Due to limited space, the guns on the twins are usually stored below deck together with the empty shielded mounts and the pedestals. There are a total of 12 fittings on each side where the pedestals can be fastened. The twin mounts are only used on 'special' occasions (= shooting at unarmed and unarmored vessels).
- Official speed given as 23.75 knots.
- 50 tons for mining gear or DC/DCT.
- 50 tons for improved firecontrol, train and elevation motors, loading system.
- Originally designed in the hope to crush the "hull strenght 0.50 with speed >24 knots" rule which I beleive is the main culprit that allows such ships to be made.
- Obviously plan failed miserably. ^_^;;

Shimushu, Japan Kaibokan laid down 1941

Ships: 18. Shimushu, Hachijo, Kunashiri, Ishigaki, Etorofu, Hirado, Tsushima, Fukue, Matsuwa, Mutsure, Sado, Oki, Manju, Kanju, Iki, Amakusa, Wakamiya, Kasado.

Displacement:
880 t light; 938 t standard; 1,174 t normal; 1,363 t full load

Dimensions: Length overall / water x beam x draught
264.41 ft / 260.00 ft x 32.00 ft x 11.30 ft (normal load)
80.59 m / 79.25 m x 9.75 m x 3.44 m

Armament:
1 - 5.00" / 127 mm guns in single mounts, 55.12lbs / 25.00kg shells, 1941 Model
Automatic rapid fire gun in a deck mount with hoist
on centreline forward
2 - 5.00" / 127 mm guns (1x2 guns), 55.12lbs / 25.00kg shells, 1941 Model
Automatic rapid fire guns in a deck mount with hoist
on centreline aft
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
1 - 0.98" / 25.0 mm guns in single mounts, 0.57lbs / 0.26kg shells, 1941 Model
Anti-aircraft gun in deck mount
on centreline forward, 1 raised gun
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1941 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
Weight of broadside 174 lbs / 79 kg
Shells per gun, main battery: 300

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm -
3rd: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 6,920 shp / 5,162 Kw = 22.00 kts
Range 6,000nm at 16.00 kts
Bunker at max displacement = 425 tons

Complement:
99 - 130

Cost:
£0.500 million / $1.998 million

Distribution of weights at normal displacement:
Armament: 29 tons, 2.5%
Armour: 7 tons, 0.6%
- Belts: 0 tons, 0.0%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 7 tons, 0.6%
- Armour Deck: 0 tons, 0.0%
- Conning Tower: 0 tons, 0.0%
Machinery: 183 tons, 15.6%
Hull, fittings & equipment: 431 tons, 36.7%
Fuel, ammunition & stores: 294 tons, 25.1%
Miscellaneous weights: 230 tons, 19.6%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,370 lbs / 621 Kg = 21.9 x 5.0 " / 127 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.437
Length to Beam Ratio: 8.13 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 48
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.47 ft / 5.02 m
- Forecastle (25%): 14.76 ft / 4.50 m
- Mid (27%): 14.76 ft / 4.50 m (8.07 ft / 2.46 m aft of break)
- Quarterdeck (15%): 8.07 ft / 2.46 m
- Stern: 8.07 ft / 2.46 m
- Average freeboard: 10.05 ft / 3.06 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.7%
- Above water (accommodation/working, high = better): 83.8%
Waterplane Area: 5,252 Square feet or 488 Square metres
Displacement factor (Displacement / loading): 141%
Structure weight / hull surface area: 50 lbs/sq ft or 247 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped

40t - 2x Active Sonar
10t - Hydrophones
20t - Air Search Radar
10t - Surface Search Radar
15t - Fire Control
4t - 2 Depth Charge Projectors
16t - 16 Depth Charge Throwers
4t - 2 Depth Charge Chutes
40t - 120 Depth Charges
2t - 81mm mortar + ammunition
15t - 1200 additional 25mm rounds per gun
2t - 2 paravanes
17t - air condition system
10t - emergency diesel generators
25 t - miscellaneous
230t total

Ukuru, Japan Kaibokan laid down 1943
Ships: 14. Ukuru, Hiburi, Shonan, Daito, Okinawa, Kume, Ikuna, Shinnan, Yaku, Aguni, Mokuto, Inagi, Murotsu, Otsu.

Displacement:
900 t light; 959 t standard; 1,210 t normal; 1,412 t full load

Dimensions: Length overall / water x beam x draught
264.41 ft / 260.00 ft x 32.00 ft x 11.80 ft (normal load)
80.59 m / 79.25 m x 9.75 m x 3.60 m

Armament:
1 - 5.00" / 127 mm guns in single mounts, 55.12lbs / 25.00kg shells, 1943 Model
Automatic rapid fire gun in a deck mount with hoist
on centreline forward
2 - 5.00" / 127 mm guns (1x2 guns), 55.12lbs / 25.00kg shells, 1943 Model
Automatic rapid fire guns in a deck mount with hoist
on centreline aft
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
1 - 0.98" / 25.0 mm guns in single mounts, 0.57lbs / 0.26kg shells, 1943 Model
Anti-aircraft gun in deck mount
on centreline forward, 1 raised gun
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1943 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
Weight of broadside 175 lbs / 79 kg
Shells per gun, main battery: 300

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm -
3rd: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 7,036 shp / 5,249 Kw = 22.00 kts
Range 6,400nm at 16.00 kts
Bunker at max displacement = 453 tons

Complement:
102 - 133

Cost:
£0.533 million / $2.130 million

Distribution of weights at normal displacement:
Armament: 29 tons, 2.4 %
Armour: 7 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 182 tons, 15.0 %
Hull, fittings & equipment: 432 tons, 35.7 %
Fuel, ammunition & stores: 310 tons, 25.6 %
Miscellaneous weights: 250 tons, 20.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,379 lbs / 625 Kg = 22.1 x 5.0 " / 127 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 1.0 ft / 0.3 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.432
Length to Beam Ratio: 8.13 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.47 ft / 5.02 m
- Forecastle (25 %): 14.76 ft / 4.50 m
- Mid (27 %): 14.76 ft / 4.50 m (8.07 ft / 2.46 m aft of break)
- Quarterdeck (15 %): 8.07 ft / 2.46 m
- Stern: 8.07 ft / 2.46 m
- Average freeboard: 10.05 ft / 3.06 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.4 %
- Above water (accommodation/working, high = better): 81.0 %
Waterplane Area: 5,230 Square feet or 486 Square metres
Displacement factor (Displacement / loading): 142 %
Structure weight / hull surface area: 50 lbs/sq ft or 245 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.06
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped

40t - 2x Active Sonar
10t - Hydrophones
20t - Air Search Radar
10t - Surface Search Radar
15t - Fire Control
4t - 2 Depth Charge Projectors
16t - 16 Depth Charge Throwers
4t - 2 Depth Charge Chutes
40t - 120 Depth Charges
2t - 81mm mortar + ammunition
15t - 1200 additional 25mm rounds per gun
2t - 2 paravanes
17t - air condition system
10t - emergency diesel generators
45 t - miscellaneous
250t total

Miyake, Japan Kaibokan laid down 1947

Displacement:
1,200 t light; 1,314 t standard; 1,563 t normal; 1,762 t full load

Dimensions: Length overall / water x beam x draught
324.63 ft / 305.00 ft x 35.00 ft x 10.50 ft (normal load)
98.95 m / 92.96 m x 10.67 m x 3.20 m

Armament:
4 - 2.95" / 75.0 mm guns (2x2 guns), 12.00lbs / 5.44kg shells, 1947 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread
12 - 1.57" / 40.0 mm guns (2x6 guns), 2.00lbs / 0.91kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
16 - 0.98" / 25.0 mm guns (4x4 guns), 0.57lbs / 0.26kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 81 lbs / 37 kg
Shells per gun, main battery: 1,400

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

- Conning tower: 2.75" / 70 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 17,000 shp / 12,682 Kw = 27.70 kts
Range 3,500nm at 20.00 kts
Bunker at max displacement = 449 tons

Complement:
123 - 161

Cost:
£0.804 million / $3.216 million

Distribution of weights at normal displacement:
Armament: 12 tons, 0.7 %
Armour: 17 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 8 tons, 0.5 %
Machinery: 420 tons, 26.9 %
Hull, fittings & equipment: 402 tons, 25.7 %
Fuel, ammunition & stores: 363 tons, 23.2 %
Miscellaneous weights: 350 tons, 22.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,010 lbs / 458 Kg = 78.5 x 3.0 " / 75 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 1.2 ft / 0.4 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.488
Length to Beam Ratio: 8.71 : 1
'Natural speed' for length: 20.18 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.75 ft / 7.24 m
- Forecastle (15 %): 16.75 ft / 5.11 m
- Mid (40 %): 16.75 ft / 5.11 m
- Quarterdeck (30 %): 9.75 ft / 2.97 m (16.75 ft / 5.11 m before break)
- Stern: 9.75 ft / 2.97 m
- Average freeboard: 15.07 ft / 4.59 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 122.4 %
- Above water (accommodation/working, high = better): 189.7 %
Waterplane Area: 7,315 Square feet or 680 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.06
- Overall: 0.58
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
Good seaboat, rides out heavy weather easily