WesWorld

...as currently planned.

(drawing thanks to BigRich)

Any comments?



PRS Quezon, Filipino Battleship laid down 1932

Displacement:
30,999 t light; 32,910 t standard; 35,485 t normal; 37,546 t full load

Dimensions: Length overall / water x beam x draught
711.92 ft / 710.00 ft x 104.00 ft x 29.00 ft (normal load)
216.99 m / 216.41 m x 31.70 m x 8.84 m

Armament:
9 - 13.78" / 350 mm guns (3x3 guns), 1,310.00lbs / 594.21kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
14 - 6.10" / 155 mm guns (7x2 guns), 120.00lbs / 54.43kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships, 3 raised mounts - superfiring
16 - 3.94" / 100 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1932 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 6 raised mounts - superfiring
18 - 0.98" / 25.0 mm guns (6x3 guns), 0.57lbs / 0.26kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 5 raised mounts
16 - 0.54" / 13.7 mm guns (8x2 guns), 0.11lbs / 0.05kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 13,994 lbs / 6,348 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.8" / 375 mm 385.33 ft / 117.45 m 12.30 ft / 3.75 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 385.33 ft / 117.45 m 13.12 ft / 4.00 m
Main Belt covers 83 % of normal length

- Torpedo Bulkhead:
1.18" / 30 mm 385.33 ft / 117.45 m 27.07 ft / 8.25 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 380 mm 9.45" / 240 mm 13.8" / 350 mm
2nd: 2.95" / 75 mm 1.57" / 40 mm 1.97" / 50 mm
3rd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
4th: 0.59" / 15 mm - -

- Armour deck: 4.92" / 125 mm, Conning tower: 13.58" / 345 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 106,321 shp / 79,316 Kw = 27.75 kts
Range 15,360nm at 12.00 kts (Bunkerage = 4,636 tons)

Complement:
1,292 - 1,680

Cost:
£13.545 million / $54.180 million

Distribution of weights at normal displacement:
Armament: 1,733 tons, 4.9 %
Armour: 12,209 tons, 34.4 %
- Belts: 3,523 tons, 9.9 %
- Torpedo bulkhead: 456 tons, 1.3 %
- Armament: 3,088 tons, 8.7 %
- Armour Deck: 4,826 tons, 13.6 %
- Conning Tower: 316 tons, 0.9 %
Machinery: 3,138 tons, 8.8 %
Hull, fittings & equipment: 13,845 tons, 39.0 %
Fuel, ammunition & stores: 4,486 tons, 12.6 %
Miscellaneous weights: 75 tons, 0.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41,271 lbs / 18,720 Kg = 31.5 x 13.8 " / 350 mm shells or 5.8 torpedoes
Stability (Unstable if below 1.00): 1.04
Metacentric height 5.7 ft / 1.7 m
Roll period: 18.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.580
Length to Beam Ratio: 6.83 : 1
'Natural speed' for length: 26.65 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (23 %): 21.60 ft / 6.58 m
- Mid (50 %): 21.40 ft / 6.52 m
- Quarterdeck (23 %): 21.40 ft / 6.52 m
- Stern: 21.40 ft / 6.52 m
- Average freeboard: 21.51 ft / 6.56 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.5 %
- Above water (accommodation/working, high = better): 167.6 %
Waterplane Area: 53,003 Square feet or 4,924 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 192 lbs/sq ft or 938 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.32
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

13.78 inch guns?

Who used 35cm cannon on a warship?

South Africa and India use 35 cm guns...

Nice drawing. The fantail looks 'stubby" and doesn't balance with the bow. The after magazine would not have a lot of internal space.

I see.

Also Iberia does

Having a gab between A and B turret surely increases resistance against a single disabeling hit but I don´t think her hull is long enough. You can´t affort it with C turret aft.

So I would move everything behind A turret forward several meters. Probably you can also move C turret closer to the aft superstructure.

Why the upper belt armour? Or rather, Why so thin?

Overall, I can't see anything that she really gains over Caracciolo of nearly 20 years previously. She is slower, mounts smaller guns and is bigger. sure her armour is a bit better, but Caracciolo doesn't have the advantage of weight-saving all or nothing protection.

Design features (armament, armor, speed, range) are functions of how the user intends to employ the ship. There is really no 'standard'. Comparing design A to design B is useful when both designs are built to fulfill the same role.
(So much for my morning rant...)

Quoted

Why the upper belt armour? Or rather, Why so thin?

It's intended as a decapping plate; including that, the "actual" armour thickness is 415mm. In addition it tapers off above and below the belt proper.

Ah yes, the Filippino quest for the better decapping plate. Must not forget that appears in several newer designs. I won't if SS 3 will handle that and other more detailed armor styles?

Why should the Philipines use a decapping plate on their ships? There is no historical preceedence for it whatsoever. It was a system only used on 1 ship Class ever. I think Italy might suddenly acquire larger numbers of Ocean-going airships; think Macon/Akron but much larger carrying torpedo bombers. Its about as reasonable.

Well the battleships will keep it - we'll call it an experiment. ;-)

The cruisers have returned to a "traditional" armour scheme.