Wyprawa polskiej floty na Hajnan w toku wojny Japonią
wykazała m.in. potrzebę posiadania w składzie sił morskich wyspecjalizowanego
okrętu warsztatowego, który mógłby udzielać wsparcia zespołowi floty
odbywającemu długi rejs, w trakcie którego różnego rodzaju awarie i uszkodzenia
były wręcz nieuniknione. Ponieważ przed 1905 r. nie mieliśmy w składzie floty
takiej jednostki, trzeba było ad hoc przystosować do pełnienia funkcji
jednostki warsztatowej jeden z transportowców. Aby w przyszłości uniknąć
konieczności takiego improwizowania, postanowiłem wcielić stosowną jednostkę w
skład floty. Jest to jeden z trzech zakupionych transportowców, z których dwa,
jak pamiętamy, zostały mają pełnić funkcję węglowców, a trzecia – właśnie jednostki warsztatowej. Wydaje się,
że kadłub bazowy jest wystarczająco obszerny, by zaaranżować odpowiednio
obszerne pomieszczenia magazynowe i warsztaty. Okręt nie grzeszy nadmiernym
uzbrojeniem, bo też nie przewiduję by gdziekolwiek miał się ruszać sam – wręcz
przeciwnie, jeśli już, to w składzie większego zespołu, który miałby
obsługiwać.
Hefajstos, polish repair ship laid down 1902, purchased 1905, rebuilt 1906
Displacement:
6 484 t light; 6 634 t standard; 7 269 t normal; 7 778 t full load
Dimensions: Length overall / water x beam x draught
374,48 ft / 351,02 ft x 51,57 ft x 21,42 ft (normal load)
114,14 m / 106,99 m x 15,72 m x 6,53 m
Armament:
2 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1891 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
2 - 2,24" / 57,0 mm guns in single mounts, 5,23lbs / 2,37kg shells, 1885 Model
Quick firing guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 36 lbs / 16 kg
Shells per gun, main battery: 200
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 1 shaft, 3 691 ihp / 2 753 Kw = 14,00 kts
Range 9 500nm at 8,00 kts
Bunker at max displacement = 1 144 tons (100% coal)
Complement:
393 - 511
Cost:
£0,309 million / $1,236 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0,1%
Machinery: 559 tons, 7,7%
Hull, fittings & equipment: 4 670 tons, 64,2%
Fuel, ammunition & stores: 786 tons, 10,8%
Miscellaneous weights: 1 250 tons, 17,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16 280 lbs / 7 385 Kg = 1 264,8 x 3,0 " / 75 mm shells or 3,2 torpedoes
Stability (Unstable if below 1.00): 1,19
Metacentric height 2,6 ft / 0,8 m
Roll period: 13,6 seconds
Steadiness - As gun platform (Average = 50 %): 30 %
- Recoil effect (Restricted arc if above 1.00): 0,01
Seaboat quality (Average = 1.00): 1,20
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0,656
Length to Beam Ratio: 6,81 : 1
'Natural speed' for length: 18,74 kts
Power going to wave formation at top speed: 36 %
Trim (Max stability = 0, Max steadiness = 100): 15
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 23,46 ft / 7,15 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26,02 ft / 7,93 m
- Forecastle (12%): 25,03 ft / 7,63 m (18,54 ft / 5,65 m aft of break)
- Mid (50%): 14,57 ft / 4,44 m
- Quarterdeck (9%): 16,57 ft / 5,05 m
- Stern: 18,54 ft / 5,65 m
- Average freeboard: 17,32 ft / 5,28 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 45,5%
- Above water (accommodation/working, high = better): 107,0%
Waterplane Area: 13 762 Square feet or 1 279 Square metres
Displacement factor (Displacement / loading): 302%
Structure weight / hull surface area: 206 lbs/sq ft or 1 008 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2,80
- Longitudinal: 6,70
- Overall: 3,05
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
Displacement:
6 484 t light; 6 634 t standard; 7 269 t normal; 7 778 t full load
Dimensions: Length overall / water x beam x draught
374,48 ft / 351,02 ft x 51,57 ft x 21,42 ft (normal load)
114,14 m / 106,99 m x 15,72 m x 6,53 m
Armament:
2 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1891 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
2 - 2,24" / 57,0 mm guns in single mounts, 5,23lbs / 2,37kg shells, 1885 Model
Quick firing guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 36 lbs / 16 kg
Shells per gun, main battery: 200
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 1 shaft, 3 691 ihp / 2 753 Kw = 14,00 kts
Range 9 500nm at 8,00 kts
Bunker at max displacement = 1 144 tons (100% coal)
Complement:
393 - 511
Cost:
£0,309 million / $1,236 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0,1%
Machinery: 559 tons, 7,7%
Hull, fittings & equipment: 4 670 tons, 64,2%
Fuel, ammunition & stores: 786 tons, 10,8%
Miscellaneous weights: 1 250 tons, 17,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16 280 lbs / 7 385 Kg = 1 264,8 x 3,0 " / 75 mm shells or 3,2 torpedoes
Stability (Unstable if below 1.00): 1,19
Metacentric height 2,6 ft / 0,8 m
Roll period: 13,6 seconds
Steadiness - As gun platform (Average = 50 %): 30 %
- Recoil effect (Restricted arc if above 1.00): 0,01
Seaboat quality (Average = 1.00): 1,20
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0,656
Length to Beam Ratio: 6,81 : 1
'Natural speed' for length: 18,74 kts
Power going to wave formation at top speed: 36 %
Trim (Max stability = 0, Max steadiness = 100): 15
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 23,46 ft / 7,15 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26,02 ft / 7,93 m
- Forecastle (12%): 25,03 ft / 7,63 m (18,54 ft / 5,65 m aft of break)
- Mid (50%): 14,57 ft / 4,44 m
- Quarterdeck (9%): 16,57 ft / 5,05 m
- Stern: 18,54 ft / 5,65 m
- Average freeboard: 17,32 ft / 5,28 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 45,5%
- Above water (accommodation/working, high = better): 107,0%
Waterplane Area: 13 762 Square feet or 1 279 Square metres
Displacement factor (Displacement / loading): 302%
Structure weight / hull surface area: 206 lbs/sq ft or 1 008 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2,80
- Longitudinal: 6,70
- Overall: 3,05
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily