WesWorld

The SS Columbia and SS Liberty use the engines intended for the battlecruisers United States and Constitution, cancelled soon after being laid down in 1920. Built for the United States Lines with government support, these two speed liners are intended to capture the Blue Riband for America. (I'm going to be upgrading slips and docks in New York and Norfolk to Type 5's for these ladies. Being partially government funded I'm thinking at least 50% of their construction should come from my resources)

SS Columbia, United States Ocean Liner laid down 1926

Displacement:
40,721 t light; 41,706 t standard; 49,234 t normal; 55,256 t full load

Dimensions: Length overall / water x beam x draught
1,002.02 ft / 950.00 ft x 106.00 ft x 31.00 ft (normal load)
305.42 m / 289.56 m x 32.31 m x 9.45 m

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 197,171 shp / 147,089 Kw = 32.00 kts
Range 4,000nm at 30.00 kts
Bunker at max displacement = 13,551 tons

Complement:
1,652 - 2,148

Cost:
£7.976 million / $31.904 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 6,311 tons, 12.8 %
Hull, fittings & equipment: 17,209 tons, 35.0 %
Fuel, ammunition & stores: 8,513 tons, 17.3 %
Miscellaneous weights: 17,200 tons, 34.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
87,402 lbs / 39,645 Kg = 809.3 x 6 " / 152 mm shells or 4.6 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 5.5 ft / 1.7 m
Roll period: 19.0 seconds
Steadiness - As gun platform (Average = 50 %): 96 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has low forecastle, rise forward of midbreak, low quarterdeck
Block coefficient: 0.552
Length to Beam Ratio: 8.96 : 1
'Natural speed' for length: 30.82 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 48
Bow angle (Positive = bow angles forward): 34.00 degrees
Stern overhang: 23.02 ft / 7.02 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 43.00 ft / 13.11 m
- Forecastle (18 %): 37.00 ft / 11.28 m (46.00 ft / 14.02 m aft of break)
- Mid (77 %): 46.00 ft / 14.02 m (37.00 ft / 11.28 m aft of break)
- Quarterdeck (18 %): 30.00 ft / 9.14 m (37.00 ft / 11.28 m before break)
- Stern: 30.00 ft / 9.14 m
- Average freeboard: 41.51 ft / 12.65 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.2 %
- Above water (accommodation/working, high = better): 366.7 %
Waterplane Area: 70,409 Square feet or 6,541 Square metres
Displacement factor (Displacement / loading): 165 %
Structure weight / hull surface area: 143 lbs/sq ft or 700 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.09
- 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
Excellent seaboat, comfortable, rides out heavy weather easily

Man, is that cool! ;o)

One thing: Wouldn´t three funnels give her a more balanced look? Wouldn´t be the first time to have "blind" funnels on a liner just for her look...

Ey, and another: "Hull has low forecastle, rise forward of midbreak, low quarterdeck" ?!?! -> Could you explain that?

Definitly way cool! :-)

Quoted

Ey, and another: "Hull has low forecastle, rise forward of midbreak, low quarterdeck" ?!?! -> Could you explain that?

If you look closly at the pic, you can see a slight rise in the deckline at the start of the superstructure...and a dip above where the after shaft comes out of the hull.


Now the obvious question: will they have stregnthened deckpoints, for conversion into AMCs? ;-)

I went with two funnels since the Lexington only had two. To me it looks a bit more "modern and sexy". Besides, I cut and pasted from a profile drawing of the Queen Mary and if I added a third funnel it would look too much like her. As for the deckline, the more I look at it, the more I think it should be flush deck with a low quarterdeck.

They'll probably get the Blue Riband, for a while.

And as AMCs, they'd be a waste of 40,000 tons. As blazing-fast troopships that need no ASW escort, they're just the thing.

Did you consider developing them as potential conversions to carriers as the US did?
With their size & speed that might be an interesting option.
I don't know how many other 'liners' you have, but you will need a lot of purpose built troop transports (like the APA) along with fast ships such as these, so maybe an alternative wouldn't be that bad of an idea

Its a possibility...