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Brazilian Tubarão-class Submarine laid down 1931

Length, 242 ft x Beam, 21.4 ft x Depth, 12.9 ft

950 tons normal displacement (831 tons standard)

Main battery: 1 x 3.94-inch / 100mm

Secondary battery: 2 x 0.98-inch / 25mm

Weight of broadside: 32 lbs

8 TT, 21.0" (6 submerged)

Operational diving depth: 185 feet

Emergency diving depth: classified

Crush depth: classified

Maximum speed for 1435 shp = 15.00 knots

Approximate cruising radius, 6000 nm / 12 kts

Typical complement: 86-111

Estimated cost, $605,000 (£151,000)

Distribution of weights:

Percent

normal

displacement:

Armament ......................... 4 tons = 0 pct

Machinery ........................ 44 tons = 5 pct

Hull and fittings; equipment ..... 561 tons = 59 pct

Fuel, ammunition, stores ......... 140 tons = 15 pct

Miscellaneous weights ............ 200 tons = 21 pct

-----

950 tons = 100 pct

Estimated metacentric height, 0.6 ft

Displacement summary:

Light ship: 809 tons

Standard displacement: 831 tons

Normal service: 950 tons

Full load: 1041 tons

Loading submergence 93 tons/foot

+++++++++++++++++++++++++

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.09

Shellfire needed to sink: 584 lbs = 19.1 x 3.9-inch shells

(Approximates weight of penetrating

shell hits needed to sink ship,

not counting critical hits)

Torpedoes needed to sink: 0.3

(Approximates number of 'typical'

torpedo hits needed to sink ship)

Relative steadiness as gun platform, 1 percent

(50 percent is 'average')

Relative rocking effect from firing to beam, 0.00

Relative quality as a seaboat: 0.00

+++++++++++++++++++++++++

Hull form characteristics:

Block coefficient: 0.50

Sharpness coefficient: 0.32

Hull speed coefficient 'M' = 7.51

'Natural speed' for length = 15.5 knots

Power going to wave formation

at top speed: 37 percent

Estimated hull characteristics and strength:

Relative underwater volume absorbed by

magazines and engineering spaces: 86 percent

Relative accommodation and working space: 1 percent

Displacement factor: 297 percent

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 3.87

(Structure weight per square

foot of hull surface: 113 lbs)

Relative longitudinal hull strength: 1.44

(for 0.1 ft average freeboard;

freeboard adjustment -9.4 ft)

Relative composite hull strength: 1.85

Three Ships:

*Piranha*

Manta

Paraiba

Length, 242 ft x Beam, 21.4 ft x Depth, 12.9 ft

950 tons normal displacement (831 tons standard)

Main battery: 1 x 3.94-inch / 100mm

Secondary battery: 2 x 0.98-inch / 25mm

Weight of broadside: 32 lbs

8 TT, 21.0" (6 submerged)

Operational diving depth: 185 feet

Emergency diving depth: classified

Crush depth: classified

Maximum speed for 1435 shp = 15.00 knots

Approximate cruising radius, 6000 nm / 12 kts

Typical complement: 86-111

Estimated cost, $605,000 (£151,000)

Distribution of weights:

Percent

normal

displacement:

Armament ......................... 4 tons = 0 pct

Machinery ........................ 44 tons = 5 pct

Hull and fittings; equipment ..... 561 tons = 59 pct

Fuel, ammunition, stores ......... 140 tons = 15 pct

Miscellaneous weights ............ 200 tons = 21 pct

-----

950 tons = 100 pct

Estimated metacentric height, 0.6 ft

Displacement summary:

Light ship: 809 tons

Standard displacement: 831 tons

Normal service: 950 tons

Full load: 1041 tons

Loading submergence 93 tons/foot

+++++++++++++++++++++++++

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.09

Shellfire needed to sink: 584 lbs = 19.1 x 3.9-inch shells

(Approximates weight of penetrating

shell hits needed to sink ship,

not counting critical hits)

Torpedoes needed to sink: 0.3

(Approximates number of 'typical'

torpedo hits needed to sink ship)

Relative steadiness as gun platform, 1 percent

(50 percent is 'average')

Relative rocking effect from firing to beam, 0.00

Relative quality as a seaboat: 0.00

+++++++++++++++++++++++++

Hull form characteristics:

Block coefficient: 0.50

Sharpness coefficient: 0.32

Hull speed coefficient 'M' = 7.51

'Natural speed' for length = 15.5 knots

Power going to wave formation

at top speed: 37 percent

Estimated hull characteristics and strength:

Relative underwater volume absorbed by

magazines and engineering spaces: 86 percent

Relative accommodation and working space: 1 percent

Displacement factor: 297 percent

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 3.87

(Structure weight per square

foot of hull surface: 113 lbs)

Relative longitudinal hull strength: 1.44

(for 0.1 ft average freeboard;

freeboard adjustment -9.4 ft)

Relative composite hull strength: 1.85

Three Ships:

Manta

Paraiba

You smug-faced crowds with kindling eye

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

A Class, Brazil Coastal Submarine laid down 1936

Displacement:

337 t light; 345 t standard; 354 t normal; 361 t full load

Dimensions: Length overall / water x beam x draught

150.00 ft / 150.00 ft x 15.00 ft x 10.00 ft (normal load)

45.72 m / 45.72 m x 4.57 m x 3.05 m

Armament:

1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1936 Model

Breech loading gun in deck mount

on centreline aft

2 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on centreline, all aft

Weight of broadside 14 lbs / 7 kg

Shells per gun, main battery: 150

4 - 21.0" / 533.4 mm submerged torpedo tubes

3 tubes forward, 1 aft.

8 21in torpedos carried=16 tons

Machinery:

Diesel Internal combustion engines plus batteries,

Electric cruising motors plus geared drives, 2 shafts, 2,998 shp / 2,237 Kw = 20.00 kts

Range 5,000nm at 5.00 kts

Bunker at max displacement = 16 tons

Complement:

39 - 52

Cost:

£0.132 million / $0.529 million

Distribution of weights at normal displacement:

Armament: 2 tons, 0.5 %

Machinery: 84 tons, 23.8 %

Hull, fittings & equipment: 192 tons, 54.2 %

Fuel, ammunition & stores: 17 tons, 4.8 %

Miscellaneous weights: 59 tons, 16.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

11 lbs / 5 Kg = 0.8 x 3.0 " / 76 mm shells or 0.0 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.3 ft / 0.1 m

Roll period: 11.6 seconds

Steadiness - As gun platform (Average = 50 %): 0 %

- Recoil effect (Restricted arc if above 1.00): 0.00

Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0.550

Length to Beam Ratio: 10.00 : 1

'Natural speed' for length: 12.25 kts

Power going to wave formation at top speed: 67 %

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: 0.00 ft / 0.00 m

- Forecastle (20 %): 0.00 ft / 0.00 m

- Mid (50 %): 0.00 ft / 0.00 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 0.00 ft / 0.00 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 393.5 %

- Above water (accommodation/working, high = better): 0.0 %

Waterplane Area: 1,570 Square feet or 146 Square metres

Displacement factor (Displacement / loading): 146 %

Structure weight / hull surface area: 80 lbs/sq ft or 391 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 3.55

- Longitudinal: 2.01

- Overall: 2.32

Hull space for machinery, storage, compartmentation is extremely poor

Room for accommodation and workspaces is extremely poor

Ship has quick, lively roll, not a steady gun platform

Operational diving depth: 232 ft / 69.6 meters

Emergency diving depth: 371 ft / 111.3 meters

Crush Depth 580 ft / 174 meters

Eight ships:

*A-1*

A-2

A-3

A-4

A-5

A-6

A-7

A-8

Displacement:

337 t light; 345 t standard; 354 t normal; 361 t full load

Dimensions: Length overall / water x beam x draught

150.00 ft / 150.00 ft x 15.00 ft x 10.00 ft (normal load)

45.72 m / 45.72 m x 4.57 m x 3.05 m

Armament:

1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1936 Model

Breech loading gun in deck mount

on centreline aft

2 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1936 Model

Anti-aircraft guns in deck mounts

on centreline, all aft

Weight of broadside 14 lbs / 7 kg

Shells per gun, main battery: 150

4 - 21.0" / 533.4 mm submerged torpedo tubes

3 tubes forward, 1 aft.

8 21in torpedos carried=16 tons

Machinery:

Diesel Internal combustion engines plus batteries,

Electric cruising motors plus geared drives, 2 shafts, 2,998 shp / 2,237 Kw = 20.00 kts

Range 5,000nm at 5.00 kts

Bunker at max displacement = 16 tons

Complement:

39 - 52

Cost:

£0.132 million / $0.529 million

Distribution of weights at normal displacement:

Armament: 2 tons, 0.5 %

Machinery: 84 tons, 23.8 %

Hull, fittings & equipment: 192 tons, 54.2 %

Fuel, ammunition & stores: 17 tons, 4.8 %

Miscellaneous weights: 59 tons, 16.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

11 lbs / 5 Kg = 0.8 x 3.0 " / 76 mm shells or 0.0 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.3 ft / 0.1 m

Roll period: 11.6 seconds

Steadiness - As gun platform (Average = 50 %): 0 %

- Recoil effect (Restricted arc if above 1.00): 0.00

Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0.550

Length to Beam Ratio: 10.00 : 1

'Natural speed' for length: 12.25 kts

Power going to wave formation at top speed: 67 %

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: 0.00 ft / 0.00 m

- Forecastle (20 %): 0.00 ft / 0.00 m

- Mid (50 %): 0.00 ft / 0.00 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 0.00 ft / 0.00 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 393.5 %

- Above water (accommodation/working, high = better): 0.0 %

Waterplane Area: 1,570 Square feet or 146 Square metres

Displacement factor (Displacement / loading): 146 %

Structure weight / hull surface area: 80 lbs/sq ft or 391 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 3.55

- Longitudinal: 2.01

- Overall: 2.32

Hull space for machinery, storage, compartmentation is extremely poor

Room for accommodation and workspaces is extremely poor

Ship has quick, lively roll, not a steady gun platform

Operational diving depth: 232 ft / 69.6 meters

Emergency diving depth: 371 ft / 111.3 meters

Crush Depth 580 ft / 174 meters

Eight ships:

A-2

A-3

A-4

A-5

A-6

A-7

A-8

You smug-faced crowds with kindling eye

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

B-Class Submarine

As completed.

Date: 1940

Ocean

Armament 2x 1.1" AA

ElecHP: 4725hp

DieselHP: 6750hp

CREW: 66

wt fuel&batts: 680t

Light Displacement 1,470t

Loaded Displacement 1,874t

Full Displacement 2,299t

Reserve buoyancy: 18%

Max Surf Speed: 18.4 knots

Max Sub Speed: 11.0 knots

Length: 95.0m

Beam: 8.8m

Draft: 5.5m

Crush depth: 300m

#TT 8 x 533mm (6 bow, 2 stern)

Mines: 24 tons (16 reload torpedoes simmed as mines)

Tons Oil: 380.0t

Tons Battery: 300.0t

Miscellaneous Weight: 38 tons

Surface Range: 12268nm@12 knots

Submerged Range: 62nm@6 knots

Eight Ships:

*B-1*

B-2

B-3

B-4

B-5

B-6

B-7

B-8

Sim by Brock

As completed.

Date: 1940

Ocean

Armament 2x 1.1" AA

ElecHP: 4725hp

DieselHP: 6750hp

CREW: 66

wt fuel&batts: 680t

Light Displacement 1,470t

Loaded Displacement 1,874t

Full Displacement 2,299t

Reserve buoyancy: 18%

Max Surf Speed: 18.4 knots

Max Sub Speed: 11.0 knots

Length: 95.0m

Beam: 8.8m

Draft: 5.5m

Crush depth: 300m

#TT 8 x 533mm (6 bow, 2 stern)

Mines: 24 tons (16 reload torpedoes simmed as mines)

Tons Oil: 380.0t

Tons Battery: 300.0t

Miscellaneous Weight: 38 tons

Surface Range: 12268nm@12 knots

Submerged Range: 62nm@6 knots

Eight Ships:

B-2

B-3

B-4

B-5

B-6

B-7

B-8

Sim by Brock

You smug-faced crowds with kindling eye

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

This post has been edited 2 times, last edit by "snip" (Jul 8th 2012, 12:18am)

C Class (ex-Nemesis Class), Brazilian (ex-Greek) Submarine laid down 1925

Displacement:

425 t light; 435 t standard; 463 t normal; 486 t full load

Dimensions: Length overall / water x beam x draught

165.00 ft / 165.00 ft x 16.50 ft x 11.50 ft (normal load)

50.29 m / 50.29 m x 5.03 m x 3.51 m

4 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 1 shaft, 797 shp / 595 Kw = 14.00 kts

Range 3,500nm at 9.50 kts

Bunker at max displacement = 51 tons

Complement:

49 - 64

Cost:

£0.061 million / $0.242 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %

Machinery: 26 tons, 5.6 %

Hull, fittings & equipment: 299 tons, 64.7 %

Fuel, ammunition & stores: 38 tons, 8.2 %

Miscellaneous weights: 100 tons, 21.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

185 lbs / 84 Kg = 1.7 x 6 " / 152 mm shells or 0.3 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.3 ft / 0.1 m

Roll period: 11.9 seconds

Steadiness - As gun platform (Average = 50 %): 0 %

- Recoil effect (Restricted arc if above 1.00): 0.00

Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0.518

Length to Beam Ratio: 10.00 : 1

'Natural speed' for length: 12.85 kts

Power going to wave formation at top speed: 45 %

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: 0.00 ft / 0.00 m

- Forecastle (20 %): 0.00 ft / 0.00 m

- Mid (50 %): 0.00 ft / 0.00 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 0.00 ft / 0.00 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 112.2 %

- Above water (accommodation/working, high = better): 0.0 %

Waterplane Area: 1,778 Square feet or 165 Square metres

Displacement factor (Displacement / loading): 305 %

Structure weight / hull surface area: 105 lbs/sq ft or 511 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 4.48

- Longitudinal: 2.67

- Overall: 3.04

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is extremely poor

Ship has quick, lively roll, not a steady gun platform

Caution: Lacks seaworthiness - very limited seakeeping ability

Eighteen Ships:

*C-1*

C-2

C-3

C-4

C-5

C-6

C-7

C-8

C-9

C-10

C-11

C-12

C-13

C-14

C-15

C-16

C-17

C-18

Displacement:

425 t light; 435 t standard; 463 t normal; 486 t full load

Dimensions: Length overall / water x beam x draught

165.00 ft / 165.00 ft x 16.50 ft x 11.50 ft (normal load)

50.29 m / 50.29 m x 5.03 m x 3.51 m

4 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 1 shaft, 797 shp / 595 Kw = 14.00 kts

Range 3,500nm at 9.50 kts

Bunker at max displacement = 51 tons

Complement:

49 - 64

Cost:

£0.061 million / $0.242 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %

Machinery: 26 tons, 5.6 %

Hull, fittings & equipment: 299 tons, 64.7 %

Fuel, ammunition & stores: 38 tons, 8.2 %

Miscellaneous weights: 100 tons, 21.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

185 lbs / 84 Kg = 1.7 x 6 " / 152 mm shells or 0.3 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.3 ft / 0.1 m

Roll period: 11.9 seconds

Steadiness - As gun platform (Average = 50 %): 0 %

- Recoil effect (Restricted arc if above 1.00): 0.00

Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0.518

Length to Beam Ratio: 10.00 : 1

'Natural speed' for length: 12.85 kts

Power going to wave formation at top speed: 45 %

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: 0.00 ft / 0.00 m

- Forecastle (20 %): 0.00 ft / 0.00 m

- Mid (50 %): 0.00 ft / 0.00 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 0.00 ft / 0.00 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 112.2 %

- Above water (accommodation/working, high = better): 0.0 %

Waterplane Area: 1,778 Square feet or 165 Square metres

Displacement factor (Displacement / loading): 305 %

Structure weight / hull surface area: 105 lbs/sq ft or 511 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 4.48

- Longitudinal: 2.67

- Overall: 3.04

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is extremely poor

Ship has quick, lively roll, not a steady gun platform

Caution: Lacks seaworthiness - very limited seakeeping ability

Eighteen Ships:

C-2

C-3

C-4

C-5

C-6

C-7

C-8

C-9

C-10

C-11

C-12

C-13

C-14

C-15

C-16

C-17

C-18

Who cheer when soldier lads march by,

Sneak home and pray you'll never know

The hell where youth and laughter go.

-Siegfried Sassoon

This post has been edited 1 times, last edit by "snip" (Jul 8th 2012, 12:19am)

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