Second Class Cruisers

snip · October 01, 2012, 08:52:14 PM

Information on Second Class Cruisers of the Royal Navy.

snip · October 01, 2012, 08:53:38 PM

Ships in Class: Aphrodite, Apollo, Diana, Cratos, Ceres, Bacchus, Vulcan, Nike, Hermes, Persephone, Triton, Tyche

QuoteAphrodite, Royal Navy Second Class Cruiser laid down 1895

Displacement:
3,000 t light; 3,104 t standard; 3,419 t normal; 3,671 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(314.00 ft / 300.00 ft) x 43.00 ft x (17.50 / 18.50 ft)
(95.71 m / 91.44 m) x 13.11 m x (5.33 / 5.64 m)

Armament:
2 - 6.00" / 152 mm 40.0 cal guns - 100.00lbs / 45.36kg shells, 100 per gun
Breech loading guns in deck mounts, 1895 Model
2 x Single mounts on centreline ends, evenly spread
6 - 4.70" / 119 mm 40.0 cal guns - 50.00lbs / 22.68kg shells, 150 per gun
Breech loading guns in casemate mounts, 1895 Model
6 x Single mounts on sides, evenly spread
Weight of broadside 500 lbs / 227 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 291.00 ft / 88.70 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 149 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.50" / 114 mm 0.50" / 13 mm -
2nd: 4.00" / 102 mm 2.00" / 51 mm -

- Protected deck - single deck:
For and Aft decks: 2.00" / 51 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm

- Conning towers: Forward 3.00" / 76 mm, Aft 0.00" / 0 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 9,000 ihp / 6,714 Kw = 19.91 kts
Range 4,000nm at 10.00 kts
Bunker at max displacement = 566 tons (100% coal)

Complement:
223 - 290

Cost:
£0.332 million / $1.328 million

Distribution of weights at normal displacement:
Armament: 68 tons, 2.0 %
- Guns: 68 tons, 2.0 %
Armour: 598 tons, 17.5 %
- Belts: 181 tons, 5.3 %
- Armament: 74 tons, 2.2 %
- Armour Deck: 329 tons, 9.6 %
- Conning Tower: 15 tons, 0.4 %
Machinery: 1,469 tons, 43.0 %
Hull, fittings & equipment: 865 tons, 25.3 %
Fuel, ammunition & stores: 419 tons, 12.3 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,998 lbs / 906 Kg = 18.5 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.72
Metacentric height 3.4 ft / 1.0 m
Roll period: 9.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.39

Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.530 / 0.538
Length to Beam Ratio: 6.98 : 1
'Natural speed' for length: 17.32 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 51
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: 1.50 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Forward deck: 30.00 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Aft deck: 67.00 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Quarter deck: 1.50 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Average freeboard: 12.00 ft / 3.66 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 145.4 %
- Above water (accommodation/working, high = better): 90.6 %
Waterplane Area: 8,835 Square feet or 821 Square metres
Displacement factor (Displacement / loading): 89 %
Structure weight / hull surface area: 64 lbs/sq ft or 312 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.07
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

snip · October 01, 2012, 08:54:34 PM

Ships in Class: Encounter, Concurrence, Asymptote, Rendezvous, Aspen, Diligence, Maidstone, Falcon, Harrow, Sophie, Xandar, Tribune

QuoteEncounter, United Kingdom Second Class Cruiser laid down 1898

Displacement:
4,684 t light; 4,909 t standard; 5,650 t normal; 6,243 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(350.00 ft / 350.00 ft) x 54.00 ft x (20.50 / 22.13 ft)
(106.68 m / 106.68 m) x 16.46 m x (6.25 / 6.75 m)

Armament:
12 - 6.00" / 152 mm 40.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
Breech loading guns in deck mounts, 1898 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount - superfiring
10 x Single mounts on sides, evenly spread
6 - 3.00" / 76.2 mm 40.0 cal guns - 12.50lbs / 5.67kg shells, 300 per gun
Breech loading guns in deck mounts, 1898 Model
6 x Single mounts on sides, evenly spread
6 raised mounts
Weight of broadside 1,275 lbs / 578 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm -
2nd: 1.00" / 25 mm - -

- Protected deck - single deck:
For and Aft decks: 3.00" / 76 mm
Forecastle: 1.50" / 38 mm Quarter deck: 1.50" / 38 mm

- Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 12,500 ihp / 9,325 Kw = 20.30 kts
Range 7,500nm at 10.00 kts
Bunker at max displacement = 1,334 tons (100% coal)

Complement:
325 - 423

Cost:
£0.502 million / $2.007 million

Distribution of weights at normal displacement:
Armament: 176 tons, 3.1 %
- Guns: 176 tons, 3.1 %
Armour: 828 tons, 14.7 %
- Armament: 127 tons, 2.3 %
- Armour Deck: 660 tons, 11.7 %
- Conning Tower: 41 tons, 0.7 %
Machinery: 2,016 tons, 35.7 %
Hull, fittings & equipment: 1,488 tons, 26.3 %
Fuel, ammunition & stores: 966 tons, 17.1 %
Miscellaneous weights: 175 tons, 3.1 %
- Hull below water: 25 tons
- Hull above water: 50 tons
- On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,302 lbs / 1,951 Kg = 39.8 x 6.0 " / 152 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.59
Metacentric height 4.3 ft / 1.3 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 94 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.88

Hull form characteristics:
Hull has raised forecastle,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.510 / 0.522
Length to Beam Ratio: 6.48 : 1
'Natural speed' for length: 18.71 kts
Power going to wave formation at top speed: 52 %
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 %, 24.00 ft / 7.32 m, 24.00 ft / 7.32 m
- Forward deck: 30.00 %, 15.00 ft / 4.57 m, 15.00 ft / 4.57 m
- Aft deck: 40.00 %, 15.00 ft / 4.57 m, 15.00 ft / 4.57 m
- Quarter deck: 10.00 %, 15.00 ft / 4.57 m, 15.00 ft / 4.57 m
- Average freeboard: 16.80 ft / 5.12 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 127.5 %
- Above water (accommodation/working, high = better): 111.8 %
Waterplane Area: 12,713 Square feet or 1,181 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 77 lbs/sq ft or 377 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.66
- 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

Second Class Cruisers

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