1902 MSW

[Kaiser Kirk]

SCRAPPED

MS-1, Parthian Minesweeper laid down 1902
# Built : 12

Displacement:
   250 t light; 259 t standard; 274 t normal; 286 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (134.75 ft / 131.23 ft) x 26.25 ft (Bulges 27.89 ft) x (6.56 / 6.77 ft)
   (41.07 m / 40.00 m) x 8.00 m (Bulges 8.50 m)  x (2.00 / 2.06 m)

Armament:
      1 - 3.54" / 90.0 mm 45.0 cal gun - 22.05lbs / 10.00kg shells, 200 per gun
     Quick firing gun in deck mount, 1899 Model
     1 x Single mount on centreline ends, evenly spread
      4 - 1.77" / 45.0 mm 45.0 cal guns - 2.87lbs / 1.30kg shells, 250 per gun
     Quick firing guns in deck mounts, 1899 Model
     4 x Single mounts on sides amidships
      4 raised mounts
      4 - 0.59" / 15.0 mm 74.0 cal guns - 0.12lbs / 0.05kg shells, 1,500 per gun
     Machine guns in deck mounts, 1899 Model
     2 x Twin mounts on sides, forward deck centre
      2 double raised mounts
      Weight of broadside 34 lbs / 15 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.20" / 5 mm         -               -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 345 ihp / 258 Kw = 12.00 kts
   Range 1,600nm at 8.00 kts
   Bunker at max displacement = 27 tons (90% coal)

Complement:
   33 - 43

Cost:
   £0.018 million / $0.072 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 2.6 %
   Armour: 28 tons, 10.2 %
      - Bulges: 28 tons, 10.1 %
      - Armament: 0 tons, 0.2 %
   Machinery: 52 tons, 18.9 %
   Hull, fittings & equipment: 115 tons, 41.8 %
   Fuel, ammunition & stores: 25 tons, 9.1 %
   Miscellaneous weights: 48 tons, 17.5 %
      - Hull below water: 20 tons
      - Bulge void weights: 5 tons
      - On freeboard deck: 13 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     681 lbs / 309 Kg = 30.6 x 3.5 " / 90 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.38
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.400 / 0.405
   Length to Beam Ratio: 4.71 : 1
   'Natural speed' for length: 11.46 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  13.12 ft / 4.00 m,  12.14 ft / 3.70 m
      - Forward deck:   30.00 %,  12.14 ft / 3.70 m,  10.50 ft / 3.20 m
      - Aft deck:   30.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Quarter deck:   20.00 %,  10.50 ft / 3.20 m,  2.30 ft / 0.70 m
      - Average freeboard:      10.33 ft / 3.15 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 77.5 %
      - Above water (accommodation/working, high = better): 126.2 %
   Waterplane Area: 2,005 Square feet or 186 Square metres
   Displacement factor (Displacement / loading): 139 %
   Structure weight / hull surface area: 33 lbs/sq ft or 161 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 7.52
      - Overall: 1.02
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

1902 Minesweeper

The Minesweeper has a double hull (the bulge), with the outer hull of 20mm ductile nicklesteel, wrapping completely around and under the ship.

Range : Sufficient for 14 days at 8 knots, with 10% reserve

Miscellaneous Weight
10t - advanced paravanes
10t - dragged booms
10t - 5 ton motor launch
10t- Short range radio
3t - Additional forced ventilation (0.5%)