Mine-layer Cruiser

AnchorSteam · August 10, 2020, 08:45:16 PM

THREE chosen, all for Mine-Laying

MODIFICATION -

Remove 122 tons of bunkerage and reduce Range by 1/3rd (now 1900) and the Torpedos.

Gain 130 mines.

-- Thanks TAC! ---

Scout, Aztec Light Cruiser laid down 1890

Displacement:
2,146 t light; 2,217 t standard; 2,418 t normal; 2,579 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(314.96 ft / 314.96 ft) x 39.37 ft x (13.12 / 13.79 ft)
(96.00 m / 96.00 m) x 12.00 m x (4.00 / 4.20 m)

Armament:
6 - 4.13" / 105 mm 40.0 cal guns - 33.85lbs / 15.36kg shells, 160 per gun
Quick firing guns in deck and hoist mounts, 1890 Model
1 x Single mount on centreline forward
5 x Single mounts on sides, evenly spread
4 - 2.76" / 70.0 mm 45.0 cal guns - 10.55lbs / 4.79kg shells, 200 per gun
Quick firing guns in deck mounts, 1890 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 245 lbs / 111 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm - -

- Protected deck - single deck:
For and Aft decks: 1.77" / 45 mm
Forecastle: 0.00" / 0 mm Quarter deck: 1.18" / 30 mm

- Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 5,267 ihp / 3,929 Kw = 18.50 kts
Range 2,800nm at 10.00 kts
Bunker at max displacement = 362 tons (100% coal)

Complement:
172 - 224

Cost:
£0.231 million / $0.922 million

Distribution of weights at normal displacement:
Armament: 58 tons, 2.4 %
- Guns: 58 tons, 2.4 %
Armour: 280 tons, 11.6 %
- Armament: 28 tons, 1.2 %
- Armour Deck: 244 tons, 10.1 %
- Conning Tower: 8 tons, 0.3 %
Machinery: 971 tons, 40.2 %
Hull, fittings & equipment: 814 tons, 33.7 %
Fuel, ammunition & stores: 272 tons, 11.3 %
Miscellaneous weights: 23 tons, 1.0 %
- Hull below water: 8 tons
- On freeboard deck: 15 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,706 lbs / 774 Kg = 48.3 x 4.1 " / 105 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 2.3 ft / 0.7 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 99 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.98

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.520 / 0.528
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 17.75 kts
Power going to wave formation at top speed: 46 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 18.04 ft / 5.50 m, 16.40 ft / 5.00 m
- Forward deck: 30.00 %, 16.40 ft / 5.00 m, 11.48 ft / 3.50 m
- Aft deck: 35.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 15.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Average freeboard: 13.34 ft / 4.07 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 138.2 %
- Above water (accommodation/working, high = better): 117.6 %
Waterplane Area: 8,415 Square feet or 782 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 62 lbs/sq ft or 305 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.83
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

15t - Radio
8t - 2 TT, 4 torpedoes
Protected Deck: 60mm slopes, 30mm flat, Quarterdeck. 40mm slopes, 25mm flat.

Mine-layer Cruiser

AnchorSteam