WesWorld

USS Yorktown, United States Aircraft Carrier laid down 1931

Displacement:
20,660 t light; 21,168 t standard; 23,857 t normal; 26,009 t full load

Dimensions: Length overall / water x beam x draught
811.08 ft / 770.00 ft x 83.25 ft x 26.00 ft (normal load)
247.22 m / 234.70 m x 25.37 m x 7.92 m

Armament:
8 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, all raised mounts - superfiring
16 - 1.10" / 27.9 mm guns (4x4 guns), 0.67lbs / 0.30kg shells, 1931 Model
Breech loading guns in deck mounts
on side, all amidships, all raised mounts - superfiring
24 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1931 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 511 lbs / 232 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 500.29 ft / 152.49 m 10.95 ft / 3.34 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead:
2.00" / 51 mm 500.29 ft / 152.49 m 22.62 ft / 6.89 m

- Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 121,005 shp / 90,270 Kw = 31.30 kts
Range 12,500nm at 15.00 kts
Bunker at max displacement = 4,841 tons

Complement:
959 - 1,247

Cost:
£5.598 million / $22.392 million

Distribution of weights at normal displacement:
Armament: 64 tons, 0.3 %
Armour: 3,409 tons, 14.3 %
- Belts: 918 tons, 3.8 %
- Torpedo bulkhead: 837 tons, 3.5 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 1,582 tons, 6.6 %
- Conning Tower: 71 tons, 0.3 %
Machinery: 3,619 tons, 15.2 %
Hull, fittings & equipment: 8,306 tons, 34.8 %
Fuel, ammunition & stores: 3,210 tons, 13.5 %
Miscellaneous weights: 5,250 tons, 22.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
42,141 lbs / 19,115 Kg = 674.3 x 5.0 " / 127 mm shells or 5.7 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 4.8 ft / 1.5 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.501
Length to Beam Ratio: 9.25 : 1
'Natural speed' for length: 27.75 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 27.00 degrees
Stern overhang: 21.00 ft / 6.40 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 39.40 ft / 12.01 m
- Forecastle (22 %): 39.40 ft / 12.01 m (29.75 ft / 9.07 m aft of break)
- Mid (88 %): 29.75 ft / 9.07 m
- Quarterdeck (12 %): 29.75 ft / 9.07 m
- Stern: 29.75 ft / 9.07 m
- Average freeboard: 31.87 ft / 9.71 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.0 %
- Above water (accommodation/working, high = better): 252.6 %
Waterplane Area: 42,749 Square feet or 3,971 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 113 lbs/sq ft or 550 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.95
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

72 Aircraft as built

Two hulls planned, with the possibility of a third if two of the Sacket's Harbor Class are converted to training carriers. Designed with a "Typhoon Bow" after the damage to the Lake Erie off of Samoa in 1927. Otherwise the design is basically as historical.

If I am not mistaken, you're allowed only one training carrier so you can only get rid of one Sacket's Harbor class vessel.

... of course the Japanese will be looking the other way.

Not much to say besides good ship. It's nice to see the Americans getting some new CVs.

Did you ever consider doing a Ranger-analogue?

Larger nations, such as US, UK, and Atlantis, are allowed two training carriers for some reason.

IIRC thats due to the number of hulls allowed the top teir nations.

With three light cruiser conversions that aren't working out too good, I doubt the United States will do a "Ranger-type" in Wesworld. A ship like that would work for smaller powers like Chile but not for the bigger powers, especially given what Atlantis, Japan, and now Italy and India have or are building.

No plans for a Ranger, though it was considered back when I designed the Sackets Harbor.

Okay... in that case I would build the third Yorktown.
After all: 85 aircraft on one Yorktown vs 60 on two Sackets Harbors.

85^2 is 7225tons not 5250tons. That gives about 72 aircraft instead.

Beautiful work as usual, Canis! She looks like a cross between Illustrious or Taiho and Yorktown.

A question on the enclosed bow: The historical Yorktown's carried some .50 cal. light AA up there to help cover forward angles of attack. Now that the hangar deck position is lost in the enclosed bow, any consideration to some additional light AA on either side forward of the 5" batteries to help cover that zone?

Regards,

Big Rich

Well at 60ton an aircraft, over 85 will fit aboard this ship.

... but when using 85 aircraft, it is 85 tons per aircraft, not 60.

Nice job, CanisD, she's a beaut.

Two ways to skin the aviation cat:

-For most ships, 25 tons per plane (and 25 per catapult).

-For carriers: square root of misc weight = number of a/c, plus there's the hangar size calculations too.

Ok

Quoted

24 - 0.40" / 10.2 mm guns in single mounts,

0.40"? A new American bore size, or an error?

Er... 10mm Auto and .40 cal are common pistol calibers, but the only 10mm rifle caliber I can think of is .408 CheyTac and that's only recently. Who knows, maybe he's gone light.

Well, there were also .401 and .405 Winchester rounds available during the 1930s, but neither one is a machinegun cartridge....

Those rounds are very lower-velocity, high-trajectory cartridges that have exceedingly short ranges. A machinegun round like the .408 Cheytac will do the job well.