WesWorld

Vauban, French Aircraft Carrier laid down 1931

Displacement:
12,533 t light; 12,879 t standard; 14,798 t normal; 16,334 t full load

Dimensions: Length overall / water x beam x draught
699.53 ft / 688.98 ft x 72.18 ft (Bulges 78.74 ft) x 19.69 ft (normal load)
213.22 m / 210.00 m x 22.00 m (Bulges 24.00 m) x 6.00 m

Armament:
8 - 4.72" / 120 mm guns (4x2 guns), 61.73lbs / 28.00kg shells, 1931 Model
Breech loading guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.89kg shells, 1931 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
Weight of broadside 556 lbs / 252 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 459.32 ft / 140.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 103 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -

- Armour deck: 1.97" / 50 mm, Conning tower: 2.95" / 75 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 70,040 shp / 52,250 Kw = 30.00 kts
Range 12,400nm at 15.00 kts
Bunker at max displacement = 3,455 tons

Complement:
670 - 872

Cost:
£3.416 million / $13.662 million

Distribution of weights at normal displacement:
Armament: 61 tons, 0.4 %
Armour: 1,727 tons, 11.7 %
- Belts: 432 tons, 2.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.1 %
- Armour Deck: 1,238 tons, 8.4 %
- Conning Tower: 38 tons, 0.3 %
Machinery: 2,095 tons, 14.2 %
Hull, fittings & equipment: 5,051 tons, 34.1 %
Fuel, ammunition & stores: 2,265 tons, 15.3 %
Miscellaneous weights: 3,600 tons, 24.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,209 lbs / 10,528 Kg = 440.2 x 4.7 " / 120 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 4.1 ft / 1.3 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.38

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.485
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 30.33 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 39.37 ft / 12.00 m
- Forecastle (25 %): 26.25 ft / 8.00 m
- Mid (50 %): 26.25 ft / 8.00 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 14.11 ft / 4.30 m
- Average freeboard: 21.07 ft / 6.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.3 %
- Above water (accommodation/working, high = better): 179.6 %
Waterplane Area: 33,982 Square feet or 3,157 Square metres
Displacement factor (Displacement / loading): 148 %
Structure weight / hull surface area: 101 lbs/sq ft or 492 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
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

I assume there'd be two hanger decks if she's to use sixty aircraft.

If it can be spared, a few tonnes for command facilities might be useful.

That's the idea.

And I'll see if I can get an air operations center onto her.

MN Vauban seems to be strikingly similar to RN Giovanni Caboto.

60 aircraft? Ha, more like 36-40 when you compare with Colossus or Independance classes.

Colossus class had the capacity for 48 aircraft with a single hangar. Ryujo had the same capacity on 5000 tons less, two hangars and considerably more speed.

I don't see why 60 planes can't be shiped.

2 words; Deck Parking

Double hangars on small ships make for bad stability problems.

I'm sure it would be _possible_ but would make her horribly cramped and completely ineffective in heavier weather.

Heh, I knew you'd say that. I was going to state that a double hangar would pose some of its own problems.

I would expect a few kinks on France's 3rd(?) purpose built carrier and first attempt at a small carrier.

http://p069.ezboard.com/falltheworldsbat…icID=2238.topic

Thread on USS Ranger.