Ścigacz torpedowy typu ST-53 1938 (12 szt.) i ścigacz artyleryjski SA-15 1938 (3 szt.)

Ścigacz torpedowy typu ST-53 1938 (12 szt.) i ścigacz artyleryjski SA-15 1938 (3 szt.)

Piąta i ostatnia generacja ścigaczy tej linii rozwojowej, która według mnie wyczerpała już swoje możliwości. Następne ścigacze będą budowane zgodnie z inną koncepcją. Przy znacznie mniejszej wyporności będą słabiej uzbrojone, ale mam nadzieję, co najmniej równie szybkie.

W porównaniu z jednostkami poprzedniej generacji, prezentowane okręciki są nieznacznie większe, szybsze, a także mają lepsze własności morskie. Również lepiej rozplanowano przestrzeń wewnętrzną oraz uwspółcześniono wyposażenie radionawigacyjne. Uzbrojenie pozostało bez zmian.

Ciekawostką może być to, że ścigacze te budowane były w trzech różnych stoczniach; w Ustce, Pontus Regius (Pemba) i Rabaulu (PPTR).

Wraz z wejściem do służby tych jednostek, wycofane zostały: Wilk (MGB-3 1924) oraz Chart, Bulterier, Dog, Doberman, Gryfon, Husky i Jamnik (MTB-5 1924-25). Najlepiej zachowane: Wilk, Gryfon, Husky i Jamnik zostały sprzedane na Litwę, a pozostałe złomowane.

Nowe okręty bazują: jeden dywizjon (1xSA + 4xST) na Bałtyku, drugi na PPTR, a trzeci w Namibii.

Najpierw ścigacz torpedowy.

  

ST-53, Poland Motor torpedo boat laid down 1938

Displacement:

            87 t light; 91 t standard; 100 t normal; 107 t full load

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

            (135,18 ft / 133,20 ft) x 20,51 ft x (4,27 / 4,42 ft)

            (41,20 m / 40,60 m) x 6,25 m  x (1,30 / 1,35 m)

Armament:

      3 - 0,98" / 25,0 mm 60,0 cal guns - 0,55lbs / 0,25kg shells, 1 200 per gun

              Anti-air guns in deck mounts, 1933 Model

              1 x Single mount on centreline, forward deck forward

              1 x Twin mount on centreline, aft deck aft

      Weight of broadside 2 lbs / 1 kg

      Main Torpedoes

      2 - 21,0" / 533 mm, 27,33 ft / 8,33 m torpedoes - 1,806 t each, 3,612 t total

            In 2 sets of deck mounted reloads + 2 torpedoes reloads

Machinery:

            Petrol Internal combustion motors,

            Geared drive, 3 shafts, 6 966 shp / 5 196 Kw = 41,00 kts

            Range 850nm at 14,00 kts

            Bunker at max displacement = 34 tons

Complement:

            15 - 20

Cost:

            £0,048 million / $0,194 million

Distribution of weights at normal displacement:

            Armament: 5 tons, 5,0%

               - Guns: 0 tons, 0,4%

               - Weapons: 5 tons, 4,5%

            Machinery: 38 tons, 38,2%

            Hull, fittings & equipment: 41 tons, 40,8%

            Fuel, ammunition & stores: 12 tons, 12,4%

            Miscellaneous weights: 4 tons, 3,6%

               - On freeboard deck: 4 tons

Overall survivability and seakeeping ability:

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

              97 lbs / 44 Kg = 134,1 x 1,0 " / 25 mm shells or 0,1 torpedoes

            Stability (Unstable if below 1.00): 1,32

            Metacentric height 0,8 ft / 0,2 m

            Roll period: 9,9 seconds

            Steadiness      - As gun platform (Average = 50 %): 71 %

                                   - Recoil effect (Restricted arc if above 1.00): 0,01

            Seaboat quality  (Average = 1.00): 1,05

Hull form characteristics:

            Hull has raised forecastle,

              a normal bow and large transom stern

            Block coefficient (normal/deep): 0,300 / 0,311

            Length to Beam Ratio: 6,50 : 1

            'Natural speed' for length: 14,23 kts

            Power going to wave formation at top speed: 65 %

            Trim (Max stability = 0, Max steadiness = 100): 67

            Bow angle (Positive = bow angles forward): 11,00 degrees

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

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

                                               Fore end,        Aft end

               - Forecastle:            38,00%,  10,17 ft / 3,10 m,  10,17 ft / 3,10 m

               - Forward deck:       12,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Aft deck:    35,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Quarter deck:        15,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Average freeboard:                      7,93 ft / 2,42 m

            Ship tends to be wet forward

Ship space, strength and comments:

            Space - Hull below water (magazines/engines, low = better): 126,8%

                        - Above water (accommodation/working, high = better): 123,6%

            Waterplane Area: 1 668 Square feet or 155 Square metres

            Displacement factor (Displacement / loading): 122%

            Structure weight / hull surface area: 16 lbs/sq ft or 76 Kg/sq metre

            Hull strength (Relative):

                        - Cross-sectional: 0,54

                        - Longitudinal: 3,57

                        - Overall: 0,66

            Cramped machinery, storage, compartmentation space

            Excellent accommodation and workspace room

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

ST-53 - ST-64 (1938)

Sensors:

1 x RN-1

Teraz ścigacz artyleryjski.

SA-15, Poland Motor gun boat laid down 1938

Displacement:

            87 t light; 91 t standard; 100 t normal; 107 t full load

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

            (135,18 ft / 133,20 ft) x 20,51 ft x (4,27 / 4,42 ft)

            (41,20 m / 40,60 m) x 6,25 m  x (1,30 / 1,35 m)

Armament:

      1 - 1,57" / 40,0 mm 60,0 cal gun - 2,05lbs / 0,93kg shells, 300 per gun

              Anti-air gun in deck mount, 1933 Model

              1 x Single mount on centreline, forward deck forward

      2 - 0,98" / 25,0 mm 60,0 cal guns - 0,51lbs / 0,23kg shells, 1 200 per gun

              Anti-air guns in deck mount, 1933 Model

              1 x Twin mount on centreline, aft deck aft

      4 - 0,51" / 13,0 mm 75,0 cal guns - 0,09lbs / 0,04kg shells, 2 500 per gun

              Machine guns in deck mounts, 1938 Model

              2 x Twin 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, 6 966 shp / 5 196 Kw = 41,00 kts

            Range 850nm at 14,00 kts

            Bunker at max displacement = 34 tons

Complement:

            15 - 20

Cost:

            £0,050 million / $0,199 million

Distribution of weights at normal displacement:

            Armament: 3 tons, 2,7%

               - Guns: 1 tons, 1,3%

               - Weapons: 1 tons, 1,4%

            Machinery: 38 tons, 38,2%

            Hull, fittings & equipment: 45 tons, 45,2%

            Fuel, ammunition & stores: 13 tons, 12,8%

            Miscellaneous weights: 1 tons, 1,1%

               - Hull above water: 1 tons

Overall survivability and seakeeping ability:

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

              99 lbs / 45 Kg = 37,2 x 1,6 " / 40 mm shells or 0,1 torpedoes

            Stability (Unstable if below 1.00): 1,26

            Metacentric height 0,7 ft / 0,2 m

            Roll period: 10,3 seconds

            Steadiness      - As gun platform (Average = 50 %): 72 %

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

            Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:

            Hull has raised forecastle,

              a normal bow and large transom stern

            Block coefficient (normal/deep): 0,300 / 0,311

            Length to Beam Ratio: 6,50 : 1

            'Natural speed' for length: 14,23 kts

            Power going to wave formation at top speed: 65 %

            Trim (Max stability = 0, Max steadiness = 100): 70

            Bow angle (Positive = bow angles forward): 11,00 degrees

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

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

                                               Fore end,        Aft end

               - Forecastle:            38,00%,  10,17 ft / 3,10 m,  10,17 ft / 3,10 m

               - Forward deck:       12,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Aft deck:    35,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Quarter deck:        15,00%,  6,56 ft / 2,00 m,  6,56 ft / 2,00 m

               - Average freeboard:                      7,93 ft / 2,42 m

            Ship tends to be wet forward

Ship space, strength and comments:

            Space - Hull below water (magazines/engines, low = better): 130,5%

                        - Above water (accommodation/working, high = better): 139,0%

            Waterplane Area: 1 668 Square feet or 155 Square metres

            Displacement factor (Displacement / loading): 122%

            Structure weight / hull surface area: 17 lbs/sq ft or 85 Kg/sq metre

            Hull strength (Relative):

                        - Cross-sectional: 0,61

                        - Longitudinal: 3,97

                        - Overall: 0,73

            Cramped machinery, storage, compartmentation space

            Excellent accommodation and workspace room

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

SA-15 - SA-17 (1938)

Sensors:

1 x SP-2

1 x RN-1