Does she work????

A Class, Iberia Submarine (Coastal) laid down 1927

Displacement:

438 t light; 450 t standard; 518 t normal; 572 t full load

Dimensions: Length overall / water x beam x draught

164.04 ft / 164.04 ft x 22.97 ft x 16.00 ft (normal load)

50.00 m / 50.00 m x 7.00 m x 4.88 m

Armament:

1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1927 Model

Breech loading gun in deck mount

on centreline forward

4 - 0.49" / 12.5 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1927 Model

Breech loading guns in deck mounts

on side, all amidships, all raised mounts - superfiring

Weight of broadside 31 lbs / 14 kg

Shells per gun, main battery: 100

7 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 2 shafts, 1,419 shp / 1,059 Kw = 16.00 kts

Range 7,000nm at 10.00 kts

Bunker at max displacement = 122 tons

Complement:

53 - 70

Cost:

£0.090 million / $0.361 million

Distribution of weights at normal displacement:

Armament: 4 tons, 0.7 %

Machinery: 45 tons, 8.6 %

Hull, fittings & equipment: 289 tons, 55.8 %

Fuel, ammunition & stores: 80 tons, 15.5 %

Miscellaneous weights: 100 tons, 19.3 %

Overall survivability and seakeeping ability:

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

49 lbs / 22 Kg = 1.6 x 3.9 " / 100 mm shells or 0.1 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.6 ft / 0.2 m

Roll period: 12.8 seconds

Steadiness - As gun platform (Average = 50 %): 12 %

- Recoil effect (Restricted arc if above 1.00): 0.01

Seaboat quality (Average = 1.00): 0.06

Hull form characteristics:

Hull has low forecastle, low quarterdeck

Block coefficient: 0.301

Length to Beam Ratio: 7.14 : 1

'Natural speed' for length: 12.81 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 (1.64 ft / 0.50 m aft of break)

- Mid (50 %): 1.64 ft / 0.50 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m (1.64 ft / 0.50 m before break)

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 1.07 ft / 0.33 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 253.5 %

- Above water (accommodation/working, high = better): 14.2 %

Waterplane Area: 2,416 Square feet or 224 Square metres

Displacement factor (Displacement / loading): 235 %

Structure weight / hull surface area: 77 lbs/sq ft or 378 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 2.18

- Longitudinal: 5.14

- Overall: 2.38

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

Caution: Lacks seaworthiness - very limited seakeeping ability

Diving depth = 238'

Emergency dive = 380'

Crush depth = 619'

A Class, Iberia Submarine (Coastal) laid down 1927

Displacement:

438 t light; 450 t standard; 518 t normal; 572 t full load

Dimensions: Length overall / water x beam x draught

164.04 ft / 164.04 ft x 22.97 ft x 16.00 ft (normal load)

50.00 m / 50.00 m x 7.00 m x 4.88 m

Armament:

1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1927 Model

Breech loading gun in deck mount

on centreline forward

4 - 0.49" / 12.5 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1927 Model

Breech loading guns in deck mounts

on side, all amidships, all raised mounts - superfiring

Weight of broadside 31 lbs / 14 kg

Shells per gun, main battery: 100

7 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 2 shafts, 1,419 shp / 1,059 Kw = 16.00 kts

Range 7,000nm at 10.00 kts

Bunker at max displacement = 122 tons

Complement:

53 - 70

Cost:

£0.090 million / $0.361 million

Distribution of weights at normal displacement:

Armament: 4 tons, 0.7 %

Machinery: 45 tons, 8.6 %

Hull, fittings & equipment: 289 tons, 55.8 %

Fuel, ammunition & stores: 80 tons, 15.5 %

Miscellaneous weights: 100 tons, 19.3 %

Overall survivability and seakeeping ability:

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

49 lbs / 22 Kg = 1.6 x 3.9 " / 100 mm shells or 0.1 torpedoes

Stability (Unstable if below 1.00): 1.01

Metacentric height 0.6 ft / 0.2 m

Roll period: 12.8 seconds

Steadiness - As gun platform (Average = 50 %): 12 %

- Recoil effect (Restricted arc if above 1.00): 0.01

Seaboat quality (Average = 1.00): 0.06

Hull form characteristics:

Hull has low forecastle, low quarterdeck

Block coefficient: 0.301

Length to Beam Ratio: 7.14 : 1

'Natural speed' for length: 12.81 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 (1.64 ft / 0.50 m aft of break)

- Mid (50 %): 1.64 ft / 0.50 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m (1.64 ft / 0.50 m before break)

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 1.07 ft / 0.33 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 253.5 %

- Above water (accommodation/working, high = better): 14.2 %

Waterplane Area: 2,416 Square feet or 224 Square metres

Displacement factor (Displacement / loading): 235 %

Structure weight / hull surface area: 77 lbs/sq ft or 378 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 2.18

- Longitudinal: 5.14

- Overall: 2.38

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

Caution: Lacks seaworthiness - very limited seakeeping ability

Diving depth = 238'

Emergency dive = 380'

Crush depth = 619'

A Class (b), Iberia Submarine (Coastal) laid down 1927

Displacement:

439 t light; 450 t standard; 489 t normal; 520 t full load

Dimensions: Length overall / water x beam x draught

164.04 ft / 164.04 ft x 16.40 ft x 13.12 ft (normal load)

50.00 m / 50.00 m x 5.00 m x 4.00 m

Armament:

1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1927 Model

Breech loading gun in deck mount

on centreline forward

4 - 0.49" / 12.5 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1927 Model

Machine guns in deck mounts

on side, all amidships, all raised mounts - superfiring

Weight of broadside 31 lbs / 14 kg

Shells per gun, main battery: 100

5 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 2 shafts, 832 shp / 621 Kw = 14.00 kts

Range 7,000nm at 8.00 kts

Bunker at max displacement = 70 tons

Complement:

51 - 67

Cost:

£0.081 million / $0.324 million

Distribution of weights at normal displacement:

Armament: 4 tons, 0.8 %

Machinery: 26 tons, 5.4 %

Hull, fittings & equipment: 308 tons, 63.1 %

Fuel, ammunition & stores: 50 tons, 10.3 %

Miscellaneous weights: 100 tons, 20.4 %

Overall survivability and seakeeping ability:

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

62 lbs / 28 Kg = 2.0 x 3.9 " / 100 mm shells or 0.1 torpedoes

Stability (Unstable if below 1.00): 1.00

Metacentric height 0.3 ft / 0.1 m

Roll period: 12.0 seconds

Steadiness - As gun platform (Average = 50 %): 8 %

- Recoil effect (Restricted arc if above 1.00): 0.04

Seaboat quality (Average = 1.00): 0.04

Hull form characteristics:

Hull has low forecastle, low quarterdeck

Block coefficient: 0.485

Length to Beam Ratio: 10.00 : 1

'Natural speed' for length: 12.81 kts

Power going to wave formation at top speed: 43 %

Trim (Max stability = 0, Max steadiness = 100): 38

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 (1.64 ft / 0.50 m aft of break)

- Mid (50 %): 1.64 ft / 0.50 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m (1.64 ft / 0.50 m before break)

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 1.07 ft / 0.33 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 212.9 %

- Above water (accommodation/working, high = better): 10.8 %

Waterplane Area: 1,768 Square feet or 164 Square metres

Displacement factor (Displacement / loading): 267 %

Structure weight / hull surface area: 98 lbs/sq ft or 476 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 3.59

- Longitudinal: 4.01

- Overall: 3.63

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

Caution: Lacks seaworthiness - very limited seakeeping ability

Diving depth = 363'

Emergency dive = 580'

Crush depth = 943'

A Class (c), Iberia Submarine (Coastal) laid down 1927

Displacement:

438 t light; 450 t standard; 488 t normal; 519 t full load

Dimensions: Length overall / water x beam x draught

164.48 ft / 164.04 ft x 15.58 ft (Bulges 18.86 ft) x 12.47 ft (normal load)

50.13 m / 50.00 m x 4.75 m (Bulges 5.75 m) x 3.80 m

Armament:

1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1927 Model

Breech loading gun in deck mount

on centreline forward

4 - 0.49" / 12.5 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1927 Model

Machine guns in deck mounts

on side, all amidships, all raised mounts - superfiring

Weight of broadside 31 lbs / 14 kg

Shells per gun, main battery: 100

5 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 2 shafts, 821 shp / 612 Kw = 14.00 kts

Range 7,000nm at 8.00 kts

Bunker at max displacement = 69 tons

Complement:

51 - 67

Cost:

£0.081 million / $0.323 million

Distribution of weights at normal displacement:

Armament: 4 tons, 0.8 %

Machinery: 26 tons, 5.3 %

Hull, fittings & equipment: 309 tons, 63.2 %

Fuel, ammunition & stores: 50 tons, 10.2 %

Miscellaneous weights: 100 tons, 20.5 %

Overall survivability and seakeeping ability:

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

131 lbs / 60 Kg = 4.3 x 3.9 " / 100 mm shells or 0.2 torpedoes

Stability (Unstable if below 1.00): 1.00

Metacentric height 0.3 ft / 0.1 m

Roll period: 14.4 seconds

Steadiness - As gun platform (Average = 50 %): 15 %

- Recoil effect (Restricted arc if above 1.00): 0.02

Seaboat quality (Average = 1.00): 0.09

Hull form characteristics:

Hull has low quarterdeck

Block coefficient: 0.443

Length to Beam Ratio: 8.70 : 1

'Natural speed' for length: 12.81 kts

Power going to wave formation at top speed: 44 %

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: 1.64 ft / 0.50 m

- Forecastle (20 %): 1.64 ft / 0.50 m

- Mid (50 %): 1.64 ft / 0.50 m

- Quarterdeck (15 %): 0.00 ft / 0.00 m (1.64 ft / 0.50 m before break)

- Stern: 0.00 ft / 0.00 m

- Average freeboard: 1.39 ft / 0.43 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 145.0 %

- Above water (accommodation/working, high = better): 9.9 %

Waterplane Area: 1,621 Square feet or 151 Square metres

Displacement factor (Displacement / loading): 267 %

Structure weight / hull surface area: 100 lbs/sq ft or 487 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 3.50

- Longitudinal: 3.84

- Overall: 3.53

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

Diving depth = 357'

Emergency dive = 571'

Crush depth = 928'

## Quoted

Originally posted by Commodore Green

Last design.....YES - NO - MAYBE???????

Well how does she fair against her closest neighbours recent design?

R-62 class sub, Atlantis Coastal submarine laid down 1925

Displacement:

410 t light; 421 t standard; 438 t normal; 451 t full load

Dimensions: Length overall / water x beam x draught

135.01 ft / 135.00 ft x 15.00 ft (Bulges 22.00 ft) x 12.00 ft (normal load)

41.15 m / 41.15 m x 4.57 m (Bulges 6.71 m) x 3.66 m

Armament:

2 - 2.95" / 74.9 mm guns in single mounts, 12.84lbs / 5.82kg shells, 1925 Model

Breech loading guns in deck mounts

on centreline, evenly spread

2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1925 Model

Breech loading guns in deck mount

on centreline

Weight of broadside 27 lbs / 12 kg

Shells per gun, main battery: 150

3 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:

Diesel Internal combustion generators,

Electric motors, 2 shafts, 1,102 shp / 822 Kw = 15.00 kts

Range 6,000nm at 6.00 kts

Bunker at max displacement = 31 tons

Complement:

47 - 62

Cost:

£0.072 million / $0.290 million

Distribution of weights at normal displacement:

Armament: 3 tons, 0.8 %

Machinery: 36 tons, 8.2 %

Hull, fittings & equipment: 291 tons, 66.4 %

Fuel, ammunition & stores: 28 tons, 6.4 %

Miscellaneous weights: 80 tons, 18.3 %

Overall survivability and seakeeping ability:

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

261 lbs / 118 Kg = 20.3 x 3.0 " / 75 mm shells or 0.4 torpedoes

Stability (Unstable if below 1.00): 1.20

Metacentric height 0.4 ft / 0.1 m

Roll period: 14.5 seconds

Steadiness - As gun platform (Average = 50 %): 1 %

- 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: 0.430

Length to Beam Ratio: 6.14 : 1

'Natural speed' for length: 11.62 kts

Power going to wave formation at top speed: 58 %

Trim (Max stability = 0, Max steadiness = 100): 50

Bow angle (Positive = bow angles forward): 5.00 degrees

Stern overhang: 0.00 ft / 0.00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 0.10 ft / 0.03 m

- Forecastle (30 %): 0.10 ft / 0.03 m

- Mid (0 %): 0.10 ft / 0.03 m

- Quarterdeck (55 %): 0.10 ft / 0.03 m

- Stern: 0.10 ft / 0.03 m

- Average freeboard: 0.10 ft / 0.03 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): 0.5 %

Waterplane Area: 1,272 Square feet or 118 Square metres

Displacement factor (Displacement / loading): 246 %

Structure weight / hull surface area: 122 lbs/sq ft or 596 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 4.25

- Longitudinal: 4.53

- Overall: 4.28

Hull space for machinery, storage, compartmentation is adequate

Room for accommodation and workspaces is extremely poor

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

operational diving depth: 428 feet

Emergency diving depth: 684 feet

Crush depth: 1070 feet

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