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1

Friday, February 5th 2016, 4:56pm

Philippine Navy Ship Designs for 1948

Benguet, Philippine Light Cruiser laid down 1948

Displacement: 7,338 t light; 7,706 t standard; 8,565 t normal; 9,253 t full load

Dimensions: Length overall / water x beam x draught

570.57 ft / 557.74 ft x 57.41 ft x 17.55 ft (normal load) [173.91 m / 170.00 m x 17.50 m x 5.35 m]

Armament:

9 - 5.91" / 150 mm guns (3x3 guns), 102.98lbs / 46.71kg shells, 1948 Model Breech loading guns in turrets (on barbettes) on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.53" / 115 mm guns (4x2 guns), 46.40lbs / 21.05kg shells, 1948 Model Dual purpose guns in deck mounts with hoists on side, evenly spread
16 - 1.38" / 35.0 mm guns (8x2 guns), 1.31lbs / 0.59kg shells, 1948 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 1,319 lbs / 598 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 360.89 ft / 110.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.15" / 80 mm 2.36" / 60 mm 3.15" / 80 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.98" / 25 mm
3rd: 0.39" / 10 mm - -

Armour deck: 1.57" / 40 mm, Conning tower: 3.15" / 80 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 78,693 shp / 58,705 Kw = 33.00 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 1,547 tons

Complement: 444 - 578

Cost: £4.954 million / $19.815 million

Distribution of weights at normal displacement:

Armament: 165 tons, 1.9 %
Armour: 1,411 tons, 16.5 %
- Belts: 468 tons, 5.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 248 tons, 2.9 %
- Armour Deck: 667 tons, 7.8 %
- Conning Tower: 28 tons, 0.3 %
Machinery: 1,923 tons, 22.5 %
Hull, fittings & equipment: 3,638 tons, 42.5 %
Fuel, ammunition & stores: 1,227 tons, 14.3 %
Miscellaneous weights: 200 tons, 2.3 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 12,622 lbs / 5,725 Kg = 122.6 x 5.9 " / 150 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.6 ft / 0.8 m
Roll period: 14.9 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.533
Length to Beam Ratio: 9.71: 1
'Natural speed' for length: 26.91 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.62 ft / 7.20 m
- Forecastle (49 %): 21.98 ft / 6.70 m
- Mid (50 %): 20.67 ft / 6.30 m
- Quarterdeck (15 %): 20.67 ft / 6.30 m
- Stern: 20.67 ft / 6.30 m
- Average freeboard: 21.64 ft / 6.60 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 91.8 %
- Above water (accommodation/working, high = better): 157.5 %
Waterplane Area: 22,898 Square feet or 2,127 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 97 lbs/sq ft or 474 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.86
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Breakdown of Miscellaneous Weight

Reserved for radar and electronics suite - 100 tons
Reserved for tropicalization - 100 tons

2

Friday, February 5th 2016, 5:27pm

That's a very nice cruiser design, I like it a lot. Has a good blend of everything and doesn't break the bank.

3

Friday, February 5th 2016, 6:33pm

That's a very nice cruiser design, I like it a lot. Has a good blend of everything and doesn't break the bank.


Thanks!

It pretty much follows in the footsteps of its predecessors, with a marginal increase in the LAA outfit. With the continued growth of the destroyer flotillas, something is needed to support them.

4

Friday, February 5th 2016, 6:49pm

Looks okay... above average I would say. It looks pretty much the same as the 1944 Dumarao but with slightly more range.

5

Friday, February 5th 2016, 6:51pm

Looks okay... above average I would say. It looks pretty much the same as the 1944 Dumarao but with slightly more range.


As it should; it is the logical follow-on from the Dumarao, taking advantage of engine efficiencies and changing requirements. They should be able to combine tactically without detriment.