XSS-1, Mexican (ex-Atlantean) Midget sub laid down 1932
Displacement:
54 t light; 55 t standard; 56 t normal; 56 t full load
Dimensions: Length overall / water x beam x draught
62.00 ft / 62.00 ft x 8.75 ft x 5.75 ft (normal load)
18.90 m / 18.90 m x 2.67 m x 1.75 m
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 1 shaft, 19 shp / 14 Kw = 6.75 kts
Range 1,500nm at 5.00 kts
Bunker at max displacement = 2 tons
Complement:
9 - 13
Cost:
£0.009 million / $0.036 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 1 tons, 1.0 %
Hull, fittings & equipment: 39 tons, 70.2 %
Fuel, ammunition & stores: 2 tons, 3.7 %
Miscellaneous weights: 14 tons, 25.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
86 lbs / 39 Kg = 0.8 x 6 " / 152 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.1 ft / 0.0 m
Roll period: 10.2 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: 0.625
Length to Beam Ratio: 7.09 : 1
'Natural speed' for length: 7.87 kts
Power going to wave formation at top speed: 39 %
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): 32.1 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 399 Square feet or 37 Square metres
Displacement factor (Displacement / loading): 369 %
Structure weight / hull surface area: 65 lbs/sq ft or 318 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 5.49
- Longitudinal: 5.13
- Overall: 5.22
Hull space for machinery, storage, compartmentation is excellent
Operational depth:522 feet
Emergency depth: 835 feet
Crush depth: 1,305 feet
10 tons for ballast
4 tons for misc weight
***
XSS-2, Mexican (ex-Atlantean) Midget sub laid down 1932
Displacement:
59 t light; 60 t standard; 61 t normal; 62 t full load
Dimensions: Length overall / water x beam x draught
72.00 ft / 72.00 ft x 8.75 ft x 5.50 ft (normal load)
21.95 m / 21.95 m x 2.67 m x 1.68 m
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 1 shaft, 19 shp / 14 Kw = 6.75 kts
Range 1,500nm at 5.00 kts
Bunker at max displacement = 2 tons
Complement:
10 - 14
Cost:
£0.010 million / $0.039 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 1 tons, 0.9 %
Hull, fittings & equipment: 43 tons, 69.4 %
Fuel, ammunition & stores: 2 tons, 3.6 %
Miscellaneous weights: 16 tons, 26.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
94 lbs / 42 Kg = 0.9 x 6 " / 152 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.1 ft / 0.0 m
Roll period: 10.2 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: 0.620
Length to Beam Ratio: 8.23 : 1
'Natural speed' for length: 8.49 kts
Power going to wave formation at top speed: 33 %
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): 32.8 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 461 Square feet or 43 Square metres
Displacement factor (Displacement / loading): 358 %
Structure weight / hull surface area: 63 lbs/sq ft or 305 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 5.39
- Longitudinal: 3.44
- Overall: 3.85
Hull space for machinery, storage, compartmentation is excellent
Operational depth: 385 feet
Emergency depth: 616 feet
Crush Depth: 962 feet
10 tons for ballast
6 tons for misc weight