Flota polska w XIX w. - opancerzony kuter minowy

A oto udoskonalony typ kutra minowego, inspirowany jednostką z czasów wojny secesyjnej – USS Spuyten Duyvil, i jak ona – nawet opancerzony! Dla dodatkowej ochrony, kadłub został schowany na ile się dało pod wodę, a nad powierzchnię wystaje tylko w minimalnym stopniu. Zaokrąglony pokład pancerny sprzyja rykoszetom pocisków, które przy niskich dystansach i płaskich torach lotów powinny trafiać pod małym kątem i na skutek tego odbijać się od niego.   

Sęp, polish spar torpedo boat laid down 1869

Displacement:
    108 t light; 110 t standard; 114 t normal; 117 t full load

Dimensions: Length overall / water x beam x draught
    84,61 ft / 84,61 ft x 15,68 ft x 5,28 ft (normal load)
    25,79 m / 25,79 m x 4,78 m  x 1,61 m
    2 - above water spar torpedoes

Armour:

   - Armour deck: 2,01" / 51 mm, Conning tower: 3,94" / 100 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 2 shafts, 381 ihp / 284 Kw = 12,60 kts
    Range 490nm at 6,00 kts
    Bunker at max displacement = 7 tons (100% coal)

Complement:
    16 - 22

Cost:
    £0,011 million / $0,044 million

Distribution of weights at normal displacement:
    Armament: 0 tons, 0,0%
    Armour: 37 tons, 32,5%
       - Belts: 0 tons, 0,0%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 0 tons, 0,0%
       - Armour Deck: 35 tons, 30,7%
       - Conning Tower: 2 tons, 1,7%
    Machinery: 52 tons, 45,2%
    Hull, fittings & equipment: 17 tons, 15,1%
    Fuel, ammunition & stores: 6 tons, 5,5%
    Miscellaneous weights: 2 tons, 1,8%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      13 lbs / 6 Kg = 0,2 x 6 " / 152 mm shells or 0,1 torpedoes
    Stability (Unstable if below 1.00): 1,30
    Metacentric height 0,5 ft / 0,2 m
    Roll period: 9,3 seconds
    Steadiness    - As gun platform (Average = 50 %): 8 %
            - Recoil effect (Restricted arc if above 1.00): 0,00
    Seaboat quality  (Average = 1.00): 0,03

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,570
    Length to Beam Ratio: 5,40 : 1
    'Natural speed' for length: 9,20 kts
    Power going to wave formation at top speed: 66 %
    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:        0,52 ft / 0,16 m
       - Forecastle (20%):    1,02 ft / 0,31 m
       - Mid (50%):        1,02 ft / 0,31 m
       - Quarterdeck (15%):    1,02 ft / 0,31 m
       - Stern:        0,52 ft / 0,16 m
       - Average freeboard:    0,94 ft / 0,29 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 148,1%
        - Above water (accommodation/working, high = better): 7,5%
    Waterplane Area: 944 Square feet or 88 Square metres
    Displacement factor (Displacement / loading): 50%
    Structure weight / hull surface area: 15 lbs/sq ft or 72 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,59
        - Longitudinal: 0,48
        - Overall: 0,50
    Caution: Hull subject to strain in open-sea
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is extremely poor
    Ship has quick, lively roll, not a steady gun platform
    Caution: Lacks seaworthiness - very limited seakeeping ability