A replacement for PRS Pacifica...

Mr. Dynamite

Tuesday, September 1st 2009, 4:10am

...otherwise known as That Filipino Ship That Goes And Counts Penguins Every Year...

PRS Pinguin, Filipino Polar Exploration Ship laid down 1939

Displacement:
11,234 t light; 11,546 t standard; 14,599 t normal; 17,042 t full load

Dimensions: Length overall / water x beam x draught
521.65 ft / 521.65 ft x 91.86 ft x 16.40 ft (normal load)
159.00 m / 159.00 m x 28.00 m x 5.00 m

Armament:
4 - 4.53" / 115 mm guns (2x2 guns), 48.50lbs / 22.00kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline, all aft, 1 raised mount aft - superfiring
2 - 2.95" / 75.0 mm guns in single mounts, 13.78lbs / 6.25kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side, all forward
2 - 1.38" / 35.0 mm guns in single mounts, 1.32lbs / 0.60kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 225 lbs / 102 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 339.07 ft / 103.35 m 11.48 ft / 3.50 m
Ends: 3.94" / 100 mm 182.58 ft / 55.65 m 16.40 ft / 5.00 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
2.95" / 75 mm 521.65 ft / 159.00 m 14.76 ft / 4.50 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm 0.79" / 20 mm
2nd: 0.98" / 25 mm - 0.39" / 10 mm

Machinery:
Oil fired boilers, complex reciprocating steam engines plus diesel motors,
Electric motors, 3 shafts, 8,000 ihp / 5,968 Kw = 15.32 kts
Range 15,000nm at 15.00 kts (Bunkerage = 5,496 tons)

Complement:
663 - 863

Cost:
£2.655 million / $10.622 million

Distribution of weights at normal displacement:
Armament: 27 tons, 0.2 %
Armour: 1,632 tons, 11.2 %
- Belts: 778 tons, 5.3 %
- Torpedo bulkhead: 841 tons, 5.8 %
- Armament: 13 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 291 tons, 2.0 %
Hull, fittings & equipment: 6,284 tons, 43.0 %
Fuel, ammunition & stores: 3,365 tons, 23.0 %
Miscellaneous weights: 3,000 tons, 20.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
52,246 lbs / 23,698 Kg = 1,125.9 x 4.5 " / 115 mm shells or 13.3 torpedoes
Stability (Unstable if below 1.00): 1.41
Metacentric height 8.1 ft / 2.5 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.650
Length to Beam Ratio: 5.68 : 1
'Natural speed' for length: 22.84 kts
Power going to wave formation at top speed: 30 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: -6.56 ft / -2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.71 ft / 8.75 m
- Forecastle (20 %): 21.33 ft / 6.50 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (15 %): 14.76 ft / 4.50 m (19.69 ft / 6.00 m before break)
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 20.11 ft / 6.13 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 40.6 %
- Above water (accommodation/working, high = better): 211.6 %
Waterplane Area: 36,710 Square feet or 3,410 Square metres
Displacement factor (Displacement / loading): 269 %
Structure weight / hull surface area: 136 lbs/sq ft or 665 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.37
- Longitudinal: 1.64
- Overall: 1.40
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