Ścigacz okrętów podwodnych typu Niezłomny 1933 (3 szt.)

Ścigacz okrętów podwodnych typu Niezłomny 1933 (3 szt.)

Pierwszy okręcik zbudowany na bazie projektu PU-300. Jednostka przeznaczona jest do działań w zasadzie wyłącznie na Bałtyku, choć jak na swą wielkość wykazuje bardzo dobrą dzielność morską.

O szczegółach technicznych rozpisywać się nie będę – wszystko znajdziecie w raporcie. Co do urody sylwetki, to nie wiem, czy duży wznos dziobu nadaje jednostce wygląd zawadiacki, czy raczej pretensjonalny – ocenicie sami.

Jak zwykle w przypadku pierwszego okrętu z projektu uniwersalnego, proszę o uwagi, które będę mógł ewentualnie wykorzystać przy następnych jednostkach z tej samej rodziny.

Niezłomny, Poland Submarine chaser laid down 1933

Displacement:

            271 t light; 279 t standard; 300 t normal; 317 t full load

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

            (168,04 ft / 164,04 ft) x 20,51 ft x (7,22 / 7,49 ft)

            (51,22 m / 50,00 m) x 6,25 m  x (2,20 / 2,28 m)

Armament:

      1 - 2,95" / 75,0 mm 55,0 cal gun - 13,01lbs / 5,90kg shells, 200 per gun

              Dual purpose gun in deck and hoist mount, 1923 Model

              1 x Single mount on centreline, forward deck forward

      1 - 0,98" / 25,0 mm 60,0 cal gun - 0,55lbs / 0,25kg shells, 1 000 per gun

              Anti-air gun in deck mount, 1919 Model

              1 x Single mount on centreline, aft deck aft 1 raised mount

      2 - 0,51" / 13,0 mm 75,0 cal guns - 0,11lbs / 0,05kg shells, 2 000 per gun

              Machine guns in deck mounts, 1925 Model

              2 x Single mounts on sides, forward deck centre 2 raised mounts

      Weight of broadside 14 lbs / 6 kg

      Main DC/AS Mortars

      2 - 418,88 lbs / 190,00 kg Depth Charges + 12 reloads - 2,618 t total

            in Stern depth charge racks

      2nd DC/AS Mortars

      2 - 418,88 lbs / 190,00 kg Depth Charges + 16 reloads - 3,366 t total

            in Depth charge throwers

Machinery:

            Diesel Internal combustion motors,  plus diesel motors,

            Geared drive, 2 shafts, 3 653 shp / 2 725 Kw = 22,50 kts

            Range 2 900nm at 10,00 kts

            Bunker at max displacement = 38 tons

Complement:

            35 - 46

Cost:

            £0,124 million / $0,496 million

Distribution of weights at normal displacement:

            Armament: 14 tons, 4,6%

               - Guns: 6 tons, 1,9%

               - Weapons: 8 tons, 2,8%

            Machinery: 106 tons, 35,4%

            Hull, fittings & equipment: 151 tons, 50,2%

            Fuel, ammunition & stores: 29 tons, 9,7%

            Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:

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

              352 lbs / 160 Kg = 27,4 x 3,0 " / 75 mm shells or 0,3 torpedoes

            Stability (Unstable if below 1.00): 1,09

            Metacentric height 0,5 ft / 0,2 m

            Roll period: 11,6 seconds

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

                                   - Recoil effect (Restricted arc if above 1.00): 0,17

            Seaboat quality  (Average = 1.00): 1,40

Hull form characteristics:

            Hull has rise forward of midbreak,

              a normal bow and large transom stern

            Block coefficient (normal/deep): 0,433 / 0,441

            Length to Beam Ratio: 8,00 : 1

            'Natural speed' for length: 15,03 kts

            Power going to wave formation at top speed: 69 %

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

            Bow angle (Positive = bow angles forward): 12,50 degrees

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

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

                                               Fore end,        Aft end

               - Forecastle:            20,00%,  18,04 ft / 5,50 m,  15,09 ft / 4,60 m

               - Forward deck:       30,00%,  15,09 ft / 4,60 m,  15,09 ft / 4,60 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:                      11,23 ft / 3,42 m

Ship space, strength and comments:

            Space - Hull below water (magazines/engines, low = better): 120,9%

                        - Above water (accommodation/working, high = better): 131,5%

            Waterplane Area: 2 198 Square feet or 204 Square metres

            Displacement factor (Displacement / loading): 130%

            Structure weight / hull surface area: 29 lbs/sq ft or 144 Kg/sq metre

            Hull strength (Relative):

                        - Cross-sectional: 0,77

                        - Longitudinal: 10,53

                        - Overall: 1,00

            Cramped machinery, storage, compartmentation space

            Excellent accommodation and workspace room

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

            Good seaboat, rides out heavy weather easily

Niezłomny (1933)

Nieugięty (1933)

Nieustępliwy (1933)