Ścigacz torpedowy typu ST-25 1932-1933 (12 szt.) i ścigacz artyleryjski typu SA-8 1932-1933 (3 szt.)

Ścigacz torpedowy typu ST-25 1932-1933 (12 szt.) i ścigacz artyleryjski typu SA-8 1932-1933 (3 szt.)

Trzecia „i pół” generacja ścigaczy w naszej flocie. Od poprzedników różnią się nieco większymi wymiarami, wypornością, szybkością i zasięgiem, natomiast ich uzbrojenie i ogólne rozplanowanie pozostało bez zmian. Tradycyjnie okręty te działają w dywizjonach w składzie: 1 ścigacz artyleryjski (przewodnik dywizjonu) i 4 ścigacze torpedowe.

Jak zwykle w przypadku ścigaczy, dla uzyskania realnych osiągów musiałem trochę program „pokantować” Na razie są to najszybsze jednostki w naszej flocie.

Prezentowane jednostki będą stacjonować w bazach bałtyckich, natomiast starsze ścigacze typu Wilk (MGB-3 1924) oraz Chart (MTB-5 1924) zostają detaszowane na PPTR.

Najpierw ścigacz torpedowy.

ST-25, Poland Motor torpedo boat laid down 1932

Displacement:

            71 t light; 73 t standard; 89 t normal; 101 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

            (124,07 ft / 123,03 ft) x 20,51 ft x (4,10 / 4,39 ft)

            (37,82 m / 37,50 m) x 6,25 m  x (1,25 / 1,34 m)

Armament:

      2 - 0,98" / 25,0 mm 60,0 cal guns - 0,55lbs / 0,25kg shells, 600 per gun

              Anti-air guns in deck mounts, 1919 Model

              2 x Single mounts on centreline ends, evenly spread

      Weight of broadside 1 lbs / 0 kg

      Main Torpedoes

      2 - 21,0" / 533 mm, 27,56 ft / 8,40 m torpedoes - 1,796 t each, 3,591 t total

            In 2 sets of deck mounted side rotating tubes

Machinery:

            Petrol Internal combustion motors,

            Geared drive, 3 shafts, 5 512 shp / 4 112 Kw = 38,00 kts

            Range 800nm at 19,00 kts

            Bunker at max displacement = 32 tons

Complement:

            13 - 18

Cost:

            £0,033 million / $0,130 million

Distribution of weights at normal displacement:

            Armament: 7 tons, 8,5%

               - Guns: 0 tons, 0,4%

               - Weapons: 7 tons, 8,1%

            Machinery: 33 tons, 36,8%

            Hull, fittings & equipment: 29 tons, 32,7%

            Fuel, ammunition & stores: 18 tons, 20,4%

            Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:

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

              92 lbs / 42 Kg = 193,2 x 1,0 " / 25 mm shells or 0,1 torpedoes

            Stability (Unstable if below 1.00): 1,57

            Metacentric height 1,0 ft / 0,3 m

            Roll period: 8,6 seconds

            Steadiness      - As gun platform (Average = 50 %): 73 %

                                   - Recoil effect (Restricted arc if above 1.00): 0,00

            Seaboat quality  (Average = 1.00): 0,97

Hull form characteristics:

            Hull has a flush deck,

              a normal bow and large transom stern

            Block coefficient (normal/deep): 0,300 / 0,321

            Length to Beam Ratio: 6,00 : 1

            'Natural speed' for length: 13,80 kts

            Power going to wave formation at top speed: 64 %

            Trim (Max stability = 0, Max steadiness = 100): 75

            Bow angle (Positive = bow angles forward): 7,50 degrees

            Stern overhang: 0,00 ft / 0,00 m

            Freeboard (% = length of deck as a percentage of waterline length):

                                               Fore end,        Aft end

               - Forecastle:            30,00%,  7,87 ft / 2,40 m,  6,89 ft / 2,10 m

               - Forward deck:       20,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Aft deck:    30,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Quarter deck:        20,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Average freeboard:                      7,01 ft / 2,14 m

            Ship tends to be wet forward

Ship space, strength and comments:

            Space - Hull below water (magazines/engines, low = better): 121,3%

                        - Above water (accommodation/working, high = better): 92,6%

            Waterplane Area: 1 541 Square feet or 143 Square metres

            Displacement factor (Displacement / loading): 133%

            Structure weight / hull surface area: 13 lbs/sq ft or 65 Kg/sq metre

            Hull strength (Relative):

                        - Cross-sectional: 0,47

                        - Longitudinal: 2,36

                        - Overall: 0,55

           

            Cramped machinery, storage, compartmentation space

            Adequate accommodation and workspace room

            Ship has slow, easy roll, a good, steady gun platform

            Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

ST-25 - ST-32 (1932)

ST-33 - ST-36 (1933)

A teraz artyleryjski.

SA-8, Poland Motor gun boat laid down 1932

Displacement:

            70 t light; 73 t standard; 89 t normal; 101 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

            (124,07 ft / 123,03 ft) x 20,51 ft x (4,10 / 4,39 ft)

            (37,82 m / 37,50 m) x 6,25 m  x (1,25 / 1,34 m)

Armament:

      1 - 1,57" / 40,0 mm 60,0 cal gun - 2,14lbs / 0,97kg shells, 300 per gun

              Anti-air gun in deck mount, 1932 Model

              1 x Single mount on centreline, aft deck forward

      2 - 0,98" / 25,0 mm 60,0 cal guns - 0,53lbs / 0,24kg shells, 600 per gun

              Breech loading guns in deck mount, 1932 Model

              1 x Twin mount on centreline, aft deck aft

      2 - 0,51" / 13,0 mm 75,0 cal guns - 0,09lbs / 0,04kg shells, 1 500 per gun

              Machine guns in deck mounts, 1932 Model

              2 x Single mounts on sides, aft deck forward

      Weight of broadside 3 lbs / 2 kg

      Main DC/AS Mortars

      2 - 246,92 lbs / 112,00 kg Depth Charges + 8 reloads - 1,102 t total

            in Stern depth charge racks

Machinery:

            Petrol Internal combustion motors,

            Geared drive, 3 shafts, 5 512 shp / 4 112 Kw = 38,00 kts

            Range 800nm at 19,00 kts

            Bunker at max displacement = 32 tons

Complement:

            13 - 18

Cost:

            £0,034 million / $0,135 million

Distribution of weights at normal displacement:

            Armament: 3 tons, 2,9%

               - Guns: 1 tons, 1,3%

               - Weapons: 1 tons, 1,6%

            Machinery: 33 tons, 36,8%

            Hull, fittings & equipment: 35 tons, 39,3%

            Fuel, ammunition & stores: 19 tons, 21,0%

            Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:

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

              101 lbs / 46 Kg = 51,5 x 1,6 " / 40 mm shells or 0,2 torpedoes

            Stability (Unstable if below 1.00): 1,41

            Metacentric height 0,8 ft / 0,3 m

            Roll period: 9,3 seconds

            Steadiness      - As gun platform (Average = 50 %): 70 %

                                   - Recoil effect (Restricted arc if above 1.00): 0,02

            Seaboat quality  (Average = 1.00): 0,93

Hull form characteristics:

            Hull has a flush deck,

              a normal bow and large transom stern

            Block coefficient (normal/deep): 0,300 / 0,321

            Length to Beam Ratio: 6,00 : 1

            'Natural speed' for length: 13,80 kts

            Power going to wave formation at top speed: 64 %

            Trim (Max stability = 0, Max steadiness = 100): 75

            Bow angle (Positive = bow angles forward): 7,50 degrees

            Stern overhang: 0,00 ft / 0,00 m

            Freeboard (% = length of deck as a percentage of waterline length):

                                               Fore end,        Aft end

               - Forecastle:            30,00%,  7,87 ft / 2,40 m,  6,89 ft / 2,10 m

               - Forward deck:       20,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Aft deck:    30,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Quarter deck:        20,00%,  6,89 ft / 2,10 m,  6,89 ft / 2,10 m

               - Average freeboard:                      7,01 ft / 2,14 m

            Ship tends to be wet forward

Ship space, strength and comments:

            Space - Hull below water (magazines/engines, low = better): 124,1%

                        - Above water (accommodation/working, high = better): 155,5%

            Waterplane Area: 1 541 Square feet or 143 Square metres

            Displacement factor (Displacement / loading): 129%

            Structure weight / hull surface area: 16 lbs/sq ft or 79 Kg/sq metre

            Hull strength (Relative):

                        - Cross-sectional: 0,57

                        - Longitudinal: 2,86

                        - Overall: 0,67

            Caution: Hull subject to strain in open-sea

            Cramped machinery, storage, compartmentation space

            Excellent accommodation and workspace room

            Ship has slow, easy roll, a good, steady gun platform

            Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

SA-8 - SA-9 (1932)

SA-10 (1933)