WesWorld

For investigating the Filipinos' new Back 40. How does it look?

(the 6" turret comes off the stockpile)

PRS Pacifica, Filipino Polar Exploration Ship, laid down 1928

Displacement:
8,232 t light; 8,474 t standard; 10,766 t normal; 12,600 t full load

Dimensions: Length overall / water x beam x draught
498.69 ft / 498.69 ft x 88.58 ft x 13.12 ft (normal load)
152.00 m / 152.00 m x 27.00 m x 4.00 m

Air Group:
4 seaplanes
1 catapult, forwards

Armament:
2 - 6.00" / 152 mm guns (1x2 guns), 108.00lbs / 48.99kg shells, 1921 Model
Quick firing guns in a turret (on a barbette)
on centreline aft
2 - 3.94" / 100 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1928 Model
Quick firing guns in deck mounts with hoists
on side, all forward
6 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1928 Model
Dual purpose guns in deck mounts
on side, evenly spread
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1928 Model
Anti-aircraft guns in a deck mount
on centreline aft, all raised guns - superfiring
8 - 0.54" / 13.7 mm guns (4x2 guns), 0.11lbs / 0.05kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 319 lbs / 145 kg
Shells per gun, main battery: 135

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 328.08 ft / 100.00 m 11.29 ft / 3.44 m
Ends: 3.94" / 100 mm 170.60 ft / 52.00 m 11.29 ft / 3.44 m
Main Belt covers 101 % of normal length

- Torpedo Bulkhead:
1.97" / 50 mm 498.69 ft / 152.00 m 12.60 ft / 3.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 2.00" / 51 mm 1.97" / 50 mm
2nd: 1.18" / 30 mm - 0.79" / 20 mm
3rd: 0.98" / 25 mm - -
4th: 0.59" / 15 mm - -

- Conning tower: 2.56" / 65 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 4 shafts, 18,160 shp / 13,547 Kw = 20.00 kts
Range 15,000nm at 15.00 kts (Bunkerage = 4,126 tons)

Complement:
528 - 687

Cost:
£1.528 million / $6.111 million

Distribution of weights at normal displacement:
Armament: 39 tons, 0.4 %
Armour: 1,302 tons, 12.1 %
- Belts: 766 tons, 7.1 %
- Torpedo bulkhead: 458 tons, 4.3 %
- Armament: 51 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 27 tons, 0.2 %
Machinery: 565 tons, 5.3 %
Hull, fittings & equipment: 5,326 tons, 49.5 %
Fuel, ammunition & stores: 2,534 tons, 23.5 %
Miscellaneous weights: 1,000 tons, 9.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
39,424 lbs / 17,882 Kg = 365.0 x 6.0 " / 152 mm shells or 10.3 torpedoes
Stability (Unstable if below 1.00): 1.52
Metacentric height 8.5 ft / 2.6 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.650
Length to Beam Ratio: 5.63 : 1
'Natural speed' for length: 22.33 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (50 %): 15.58 ft / 4.75 m
- Quarterdeck (15 %): 15.58 ft / 4.75 m
- Stern: 15.58 ft / 4.75 m
- Average freeboard: 16.53 ft / 5.04 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 40.7 %
- Above water (accommodation/working, high = better): 192.6 %
Waterplane Area: 33,841 Square feet or 3,144 Square metres
Displacement factor (Displacement / loading): 287 %
Structure weight / hull surface area: 132 lbs/sq ft or 646 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.47
- Longitudinal: 1.37
- 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
Good seaboat, rides out heavy weather easily

250t for aircraft + one catapult
750t for scientific crew + equipment

You'll get more composite hull strength.

Apart from that, it looks like she'll be able to handle the abuse involved in the icebreaking mission.

I wonder what good so many guns do such ship? They need maintenance, crews, stocks etc. thus taking away tonnage, weight and space that could be used for things much more important in the ice.

The armor is also rather heavy but I guess that´s to sim her stoudly build hull...?

I think all those guns will be needed to hunt the Antarctic wildlife in order to create a decend dinner once the food supplies have mysteriously vanished.

Quoted

The armor is also rather heavy but I guess that´s to sim her stoudly build hull...?

That's right. Those are the same thicknesses as published for the Russian ~10,000t 'breakers.

As for the guns...as I mentioned the 6" turret was on the stockpile, so I threw it on, to go with the 100mm guns to get to the Part III, G, I(c) limit. Another reason is, this ship is designed for long-duration exploration missions, so the designers considered the fact that hostilities might break out during a mission, and she might have to fight her way home.

Quoted

I think all those guns will be needed to hunt the Antarctic wildlife in order to create a decend dinner once the food supplies have mysteriously vanished.

That too.

I've re-simmed her with the freeboard raised 1/4 meter and got hull strength up to 1.44.

Of course this is Wesworld. Antartica maybe important enough to warrent a major conflict. Having heavily armed icebreaking warships would give the Fillipinos an edge for Southern Polar domination.

Many thanks to CanisD for the pic. :-)



PRS Pacifica, Filipino Polar Exploration Ship, laid down 1928

Displacement:
8,232 t light; 8,474 t standard; 10,766 t normal; 12,600 t full load

Dimensions: Length overall / water x beam x draught
498.69 ft / 498.69 ft x 88.58 ft x 13.12 ft (normal load)
152.00 m / 152.00 m x 27.00 m x 4.00 m

Armament:
2 - 6.00" / 152 mm guns (1x2 guns), 108.00lbs / 48.99kg shells, 1921 Model
Quick firing guns in a turret (on a barbette)
on centreline aft
2 - 3.94" / 100 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1928 Model
Quick firing guns in deck mounts with hoists
on side, all forward
6 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1928 Model
Dual purpose guns in deck mounts
on side, evenly spread
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1928 Model
Anti-aircraft guns in a deck mount
on centreline aft, all raised guns - superfiring
8 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 319 lbs / 145 kg
Shells per gun, main battery: 135

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 328.08 ft / 100.00 m 11.29 ft / 3.44 m
Ends: 3.94" / 100 mm 170.60 ft / 52.00 m 11.29 ft / 3.44 m
Main Belt covers 101 % of normal length

- Torpedo Bulkhead:
1.97" / 50 mm 498.69 ft / 152.00 m 12.60 ft / 3.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 2.00" / 51 mm 1.97" / 50 mm
2nd: 1.18" / 30 mm - 0.79" / 20 mm
3rd: 0.98" / 25 mm - -
4th: 0.59" / 15 mm - -

- Conning tower: 2.56" / 65 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 4 shafts, 18,160 shp / 13,547 Kw = 20.00 kts
Range 15,000nm at 15.00 kts (Bunkerage = 4,126 tons)

Complement:
528 - 687

Cost:
£1.528 million / $6.111 million

Distribution of weights at normal displacement:
Armament: 39 tons, 0.4 %
Armour: 1,302 tons, 12.1 %
- Belts: 766 tons, 7.1 %
- Torpedo bulkhead: 458 tons, 4.3 %
- Armament: 51 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 27 tons, 0.2 %
Machinery: 565 tons, 5.3 %
Hull, fittings & equipment: 5,325 tons, 49.5 %
Fuel, ammunition & stores: 2,534 tons, 23.5 %
Miscellaneous weights: 1,000 tons, 9.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
40,697 lbs / 18,460 Kg = 376.8 x 6.0 " / 152 mm shells or 10.5 torpedoes
Stability (Unstable if below 1.00): 1.53
Metacentric height 8.6 ft / 2.6 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.650
Length to Beam Ratio: 5.63 : 1
'Natural speed' for length: 22.33 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.43 ft / 7.75 m
- Forecastle (20 %): 17.22 ft / 5.25 m
- Mid (50 %): 16.40 ft / 5.00 m
- Quarterdeck (15 %): 16.40 ft / 5.00 m
- Stern: 16.40 ft / 5.00 m
- Average freeboard: 17.35 ft / 5.29 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 40.7 %
- Above water (accommodation/working, high = better): 202.6 %
Waterplane Area: 33,841 Square feet or 3,144 Square metres
Displacement factor (Displacement / loading): 287 %
Structure weight / hull surface area: 131 lbs/sq ft or 640 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.44
- Longitudinal: 1.45
- Overall: 1.44
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
Good seaboat, rides out heavy weather easily

50t for winterization
125t for 4 aircraft + one catapult
825t for scientific crew + equipment

What type of underwater hull would this ship have? If it was built to icebreaker standards it would have a rounded hull with no bilge keels. This would cause a great deal of roll in normal sea and would not provide a steady gun platform.

Who needs guns when shes that ugly?

I thought the same thing when I saw the picture: "Good God! That thing is U.G.L.Y.!!!!!"

...stun the enemy with sheer ugliness, thus making him an easier target! :-)

(At least its momma didn't dress it funny! ^_^ On second thought, maybe not... o_O )

As for the hullform...good point. Unfortunatly Spring* can't do that, so we have to guesstimate.

Quoted

Originally posted by Swamphen
...stun the enemy with sheer ugliness, thus making him an easier target! :-)

Emm....
DAYGLOW ORANGE, and you think the other vessel will be an easy target!!!!!

Well, it is an EXPLORATION ship! So bright orange seemed logical so the scientists don't loose it in the snow. Granted its one heavily armed exploration ship. I'd heard penguins can be nasty, but sheesh! As for its looks, function over form. Swamp told me the catapult is on the bow, so I figured put the hanger forward too.

Quoted

Originally posted by CanisD
Well, it is an EXPLORATION ship! So bright orange seemed logical so the scientists don't loose it in the snow.

I agree, I just don't think ANYONE will ever see it as anything but an easy (to see, anyway!) target.

Would it not be better off with less weaponry, then it would not be seen as a threat, and it sure as hell can't outrun anything it can't outshoot that might hunt it down.

Quoted

DAYGLOW ORANGE, and you think the other vessel will be an easy target!!!!!

But of course, my dear Watson! After all, if the enemy thinks he's looking at a train wreck, he's not likely to be able to shoot first! ^_^

And who says she'd still be orange if hostilities became imminent? Plenty of room in there for cans of grey paint... :-)

As for the armament...I have a twin 6" turret sitting around taking up space in a Manila warehouse, and nothing else to use it on, so onto Pacifica it goes.



As a side note - in event of war, she would probably be used as a seaplane tender (hence being given a "Body of Water" name, which belong to Aviation Ships).

I've modified the pic so her upperworks are grey...and the plane, orange.

Is she uglier now? :-)

It was uglier before? (I didn't see it earlier).

A bit more range might be useful - Icebreaking is slow work (2-3 knots or so) requiring full power for a long time.

I've noticed a very very major flaw with this ship;

Where does the aircraft land if this is an icebreaker?