Looking for Liner / Troop Ship Design

[miketr]

Requirements 

Speed: 22.5 knots
Range: 4,000 nm @ 22.5 knots
Misc Weight: 5,000 tons (2,500 troops long term embarkment) + 625 tons (enough for 2,500 life boats / "landing craft") + 25 tons (long range wireless) + 100 tons of other fluff.  Grand total 5,570 misc tons.
L/B ratio: Up to 10:1

[Darman]

Pretty fast troopship

[Tanthalas]

Damn fast troopship... I personally would wonder if the number of boats wasn't a bit of overkill also.   

[Walter]

Fast, but it is the speed wiki gives for the OTL 1897 SS Kaiser Wilhelm der Grosse so it is not like it is unreasonably fast...

My attempt at simming that one and using mike's requirements. Not sure about the placement of the miscellaneous weights but it should be fairly easy to shift them around to get the proper amount of tonnage to the right positions. It should be noted that the crew and damage values still need to be corrected as per springstyle notes as well as some breakdown of the miscellaneous weights as a liner for 1st, 2nd and 3rd class passengers as well as cargo.

Kaiser Wilhelm der Grosse, Germany Ocean Liner laid down 1904 (Engine 1902)

Displacement:
   18,852 t light; 19,363 t standard; 25,584 t normal; 30,560 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (663.56 ft / 657.00 ft) x 66.00 ft x (29.50 / 34.51 ft)
   (202.25 m / 200.25 m) x 20.12 m  x (8.99 / 10.52 m)

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 39,283 ihp / 29,305 Kw = 22.50 kts
   Range 4,050nm at 22.50 kts
   Bunker at max displacement = 11,196 tons (90% coal)

Complement:
   1,010 - 1,314

Cost:
   £1.485 million / $5.939 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 5,893 tons, 23.0 %
   Hull, fittings & equipment: 6,959 tons, 27.2 %
   Fuel, ammunition & stores: 6,732 tons, 26.3 %
   Miscellaneous weights: 6,000 tons, 23.5 %
      - Hull below water: 1,500 tons
      - Hull above water: 3,000 tons
      - On freeboard deck: 1,500 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,869 lbs / 15,363 Kg = 313.6 x 6 " / 152 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 3.8 ft / 1.2 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.700 / 0.715
   Length to Beam Ratio: 9.95 : 1
   'Natural speed' for length: 25.63 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  37.00 ft / 11.28 m,  33.00 ft / 10.06 m
      - Forward deck:   30.00 %,  33.00 ft / 10.06 m,  33.00 ft / 10.06 m
      - Aft deck:   30.00 %,  33.00 ft / 10.06 m,  33.00 ft / 10.06 m
      - Quarter deck:   20.00 %,  33.00 ft / 10.06 m,  35.00 ft / 10.67 m
      - Average freeboard:      33.52 ft / 10.22 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.4 %
      - Above water (accommodation/working, high = better): 216.3 %
   Waterplane Area: 34,755 Square feet or 3,229 Square metres
   Displacement factor (Displacement / loading): 144 %
   Structure weight / hull surface area: 94 lbs/sq ft or 461 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.87
      - Longitudinal: 3.48
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, rides out heavy weather easily

[miketr]

Pretty fast troopship

Blue Riband Liner that can at need carry troops.

Damn fast troopship... I personally would wonder if the number of boats wasn't a bit of overkill also.

I agree that odds are she wouldn't need to be able to land all of the troops in one wave but I went f'it and did so anyways.  View it as an investment in life boats.

Fast, but it is the speed wiki gives for the OTL 1897 SS Kaiser Wilhelm der Grosse so it is not like it is unreasonably fast...

YUP, I would say anything to 23 knots is reasonable.  Note RMS Lusitania laid down in 1904 (w/ turbines granted) achieved a 26.5+ knot crossing. 

https://en.wikipedia.org/wiki/Blue_Riband#List_of_record_breakers

Other than in war time these ships will function has high speed luxury liners on the North Atlantic run from Bremen / Hamburg to NYC.  In war time they would function either as troop ships or be fitted with deck guns and be used as auxiliary cruisers.

Walter thanks for the design I will play with the details myself Sunday evening.

Michael

[Walter]

Odd thing is that the SS Deutschland is given a speed of 17.5 knots on its wiki page (though +22 on the other language pages) while it's eastbound crossing speed in 1901 was 23.51 knots. Shows you how reliable wiki can be. :)

[miketr]

Here is my version of the Troop Ship / AMC

Liner-1904-A, Germany Liner laid down 1904 (Engine 1902)

Displacement:
   19,500 t light; 20,083 t standard; 26,563 t normal; 31,747 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (662.73 ft / 656.17 ft) x 68.57 ft x (29.53 / 34.56 ft)
   (202.00 m / 200.00 m) x 20.90 m  x (9.00 / 10.53 m)

Armament:
      4 - 5.91" / 150 mm 45.0 cal guns - 103.86lbs / 47.11kg shells, 150 per gun
     Breech loading guns in deck mounts, 1904 Model
     4 x Single mounts on sides, evenly spread
      4 - 4.13" / 105 mm 45.0 cal guns - 35.62lbs / 16.16kg shells, 150 per gun
     Breech loading guns in deck mounts, 1904 Model
     4 x Single mounts on sides, evenly spread
      8 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 300 per gun
     Quick firing guns in deck mounts, 1904 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      Weight of broadside 589 lbs / 267 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.13" / 105 mm   2.95" / 75 mm            -
   2nd:   2.95" / 75 mm   1.97" / 50 mm            -
   3rd:   0.98" / 25 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 39,856 ihp / 29,733 Kw = 22.43 kts
   Range 3,999nm at 22.43 kts
   Bunker at max displacement = 11,665 tons (100% coal)

Complement:
   1,039 - 1,352

Cost:
   £1.556 million / $6.225 million

Distribution of weights at normal displacement:
   Armament: 91 tons, 0.3 %
      - Guns: 91 tons, 0.3 %
   Armour: 163 tons, 0.6 %
      - Armament: 163 tons, 0.6 %
   Machinery: 6,039 tons, 22.7 %
   Hull, fittings & equipment: 7,207 tons, 27.1 %
   Fuel, ammunition & stores: 7,063 tons, 26.6 %
   Miscellaneous weights: 6,000 tons, 22.6 %
      - Hull below water: 1,500 tons
      - Hull above water: 3,000 tons
      - On freeboard deck: 1,500 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     34,237 lbs / 15,530 Kg = 332.5 x 5.9 " / 150 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 3.6 ft / 1.1 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.09
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.700 / 0.715
   Length to Beam Ratio: 9.57 : 1
   'Natural speed' for length: 25.62 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  36.09 ft / 11.00 m,  36.09 ft / 11.00 m
      - Forward deck:   30.00 %,  32.81 ft / 10.00 m,  32.81 ft / 10.00 m
      - Aft deck:   35.00 %,  32.81 ft / 10.00 m,  32.81 ft / 10.00 m
      - Quarter deck:   15.00 %,  34.45 ft / 10.50 m,  34.45 ft / 10.50 m
      - Average freeboard:      33.71 ft / 10.28 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.8 %
      - Above water (accommodation/working, high = better): 216.9 %
   Waterplane Area: 36,056 Square feet or 3,350 Square metres
   Displacement factor (Displacement / loading): 144 %
   Structure weight / hull surface area: 98 lbs/sq ft or 479 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 3.37
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

1 - Date of the engines. I made that mistake myself and mixed things up (so it is a bit my fault). Depending on which tech you have available, it should either be the 1895 tech for 1900 engines or the 1902 tech for 1905 engines.

2 - Not sure about the breaks, especially the aft one. You might as well keep it a flush deck.

3 - What about the main and secondary guns? The way I see that is that they are manually trained enclosed turrets (without barbette) and with armor that thick it is quite heavy and it would be quite hard to turn them.