See:
A Philippine Inquiry
Several suggestions having been made, I have decided to try putting together designs that might fulfill those suggestions. Here I’ve opted for a small flotilla cruiser – which would strengthen the light surface forces against a Chinese threat. I am not certain that I like it though. Anyone have comments?
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TBD, Philippine Light Cruiser laid down 1947
Displacement: 4,650 t light; 4,850 t standard; 5,393 t normal; 5,828 t full load
Dimensions: Length overall / water x beam x draught
486.92 ft / 475.72 ft x 45.93 ft x 18.04 ft (normal load) [148.41 m / 145.00 m x 14.00 m x 5.50 m]
Armament:
6 - 5.91" / 150 mm guns (3x2 guns), 102.98lbs / 46.71kg shells, 1947 Model Quick firing guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
16 - 1.38" / 35.0 mm guns (4x4 guns), 1.31lbs / 0.59kg shells, 1947 Model Anti-aircraft guns in deck mounts on side, all amidships
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1947 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 641 lbs / 291 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes
Armour:
Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 360.89 ft / 110.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 117 % of normal length
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
Armour deck: 0.98" / 25 mm, Conning tower: 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 60,755 shp / 45,323 Kw = 33.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 978 tons
Complement: 314 - 409
Cost: £3.201 million / $12.805 million
Distribution of weights at normal displacement:
Armament: 80 tons, 1.5 %
Armour: 650 tons, 12.1 %
- Belts: 331 tons, 6.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 36 tons, 0.7 %
- Armour Deck: 270 tons, 5.0 %
- Conning Tower: 13 tons, 0.2 %
Machinery: 1,501 tons, 27.8 %
Hull, fittings & equipment: 2,319 tons, 43.0 %
Fuel, ammunition & stores: 743 tons, 13.8 %
Miscellaneous weights: 100 tons, 1.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 6,280 lbs / 2,848 Kg = 61.0 x 5.9 " / 150 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.9 ft / 0.6 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.17
Hull form characteristics:
Hull has rise forward of midbreak and transom stern
Block coefficient: 0.479
Length to Beam Ratio: 10.36 : 1
'Natural speed' for length: 24.88 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 23.79 ft / 7.25 m
- Mid (50 %): 21.33 ft / 6.50 m (14.76 ft / 4.50 m aft of break)
- Quarterdeck (15 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 19.10 ft / 5.82 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104.8 %
- Above water (accommodation/working, high = better): 110.8 %
Waterplane Area: 14,846 Square feet or 1,379 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 83 lbs/sq ft or 405 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 2.67
- Overall: 1.05
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate