Playing with Transports

[Valles]

First version, designed around a Type 0 slip or dry dock.

TT-1917, Maori Troop Transport laid down 1916

Displacement:
   3,246 t light; 3,333 t standard; 4,368 t normal; 5,196 t full load

Dimensions: Length overall / water x beam x draught
   229.66 ft / 229.66 ft x 39.37 ft x 19.69 ft (normal load)
   70.00 m / 70.00 m x 12.00 m  x 6.00 m

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Ends:   Unarmoured

   - Torpedo Bulkhead:
      9.29" / 236 mm   160.76 ft / 49.00 m   18.08 ft / 5.51 m

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 3,233 ihp / 2,412 Kw = 14.00 kts
   Range 6,000nm at 14.00 kts
   Bunker at max displacement = 1,863 tons (100% coal)

Complement:
   268 - 349

Cost:
   £0.234 million / $0.937 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Armour: 999 tons, 22.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 999 tons, 22.9 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 211 tons, 4.8 %
   Hull, fittings & equipment: 1,035 tons, 23.7 %
   Fuel, ammunition & stores: 1,122 tons, 25.7 %
   Miscellaneous weights: 1,001 tons, 22.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,820 lbs / 5,815 Kg = 118.7 x 6 " / 152 mm shells or 3.7 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 13.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - 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
   Block coefficient: 0.859
   Length to Beam Ratio: 5.83 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.25 ft / 8.00 m
      - Forecastle (15 %):   24.61 ft / 7.50 m
      - Mid (50 %):      24.61 ft / 7.50 m
      - Quarterdeck (15 %):   24.61 ft / 7.50 m
      - Stern:      24.61 ft / 7.50 m
      - Average freeboard:   24.70 ft / 7.53 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 85.3 %
      - Above water (accommodation/working, high = better): 147.0 %
   Waterplane Area: 8,403 Square feet or 781 Square metres
   Displacement factor (Displacement / loading): 180 %
   Structure weight / hull surface area: 51 lbs/sq ft or 250 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.73
      - Longitudinal: 16.72
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, rides out heavy weather easily

'Torpedo Bulkhead' = below-waterline cargo = 999 tons + 'Misc Weight'  = above-waterline cargo = 1001 tons = 2,000 tons cargo = 1,000 men.

3246 - 2000 = 1246 / 4 = 311.5 / 1000 = 0.3115 BP

[The Rock Doctor]

Interesting approach - why a bulkhead, rather than the common practice of adding bunkerage?

[Valles]

I didn't think of it.

In retrospect, though, I think that this way gives me a convenient way to know exactly how much weight is what, rather than having part of the cargo tangled in with something else.

[The Rock Doctor]

True.  I suppose it may give a more accurate representation of the ship's overall size and internal subdivision...

[Valles]

TT-1918, Maori Troop Transport laid down 1916

Displacement:
   9,225 t light; 9,446 t standard; 11,053 t normal; 12,339 t full load

Dimensions: Length overall / water x beam x draught
   393.70 ft / 393.70 ft x 55.77 ft x 19.69 ft (normal load)
   120.00 m / 120.00 m x 17.00 m  x 6.00 m

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Ends:   Unarmoured

   - Torpedo Bulkhead:
      12.6" / 319 mm   275.59 ft / 84.00 m   19.52 ft / 5.95 m

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 4,953 ihp / 3,695 Kw = 14.00 kts
   Range 6,000nm at 14.00 kts
   Bunker at max displacement = 2,892 tons (100% coal)

Complement:
   538 - 700

Cost:
   £0.603 million / $2.410 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Armour: 2,500 tons, 22.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 2,500 tons, 22.6 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 324 tons, 2.9 %
   Hull, fittings & equipment: 2,902 tons, 26.3 %
   Fuel, ammunition & stores: 1,828 tons, 16.5 %
   Miscellaneous weights: 3,500 tons, 31.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,110 lbs / 15,018 Kg = 306.6 x 6 " / 152 mm shells or 7.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - 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
   Block coefficient: 0.895
   Length to Beam Ratio: 7.06 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 37 %
   Trim (Max stability = 0, Max steadiness = 100): 28
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      32.81 ft / 10.00 m
      - Forecastle (15 %):   29.53 ft / 9.00 m
      - Mid (50 %):      29.53 ft / 9.00 m
      - Quarterdeck (15 %):   29.53 ft / 9.00 m
      - Stern:      29.53 ft / 9.00 m
      - Average freeboard:   29.72 ft / 9.06 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 70.4 %
      - Above water (accommodation/working, high = better): 216.6 %
   Waterplane Area: 20,724 Square feet or 1,925 Square metres
   Displacement factor (Displacement / loading): 166 %
   Structure weight / hull surface area: 71 lbs/sq ft or 349 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.81
      - Longitudinal: 6.50
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, rides out heavy weather easily

'Bulkhead' 2500
Misc 3500
Hull 3225
0.806 BP for 3,000 troops

Next option up. Marginally better capacity/BP - 13.4 per corps rather than 15.55 - but I don't have as many Type 1 slots as Type 0.

OTOH, they're cheap. May go for both.

[Valles]

TT-1919, Maori Troop Transport laid down 1916

Displacement:
   16,916 t light; 17,307 t standard; 19,562 t normal; 21,367 t full load

Dimensions: Length overall / water x beam x draught
   557.74 ft / 557.74 ft x 72.18 ft x 19.69 ft (normal load)
   170.00 m / 170.00 m x 22.00 m  x 6.00 m

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Ends:   Unarmoured

   - Torpedo Bulkhead:
      14.1" / 359 mm   390.42 ft / 119.00 m   19.59 ft / 5.97 m

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 6,886 ihp / 5,137 Kw = 14.00 kts
   Range 6,000nm at 14.00 kts
   Bunker at max displacement = 4,059 tons (100% coal)

Complement:
   826 - 1,075

Cost:
   £1.072 million / $4.288 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Armour: 3,999 tons, 20.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 3,999 tons, 20.4 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 450 tons, 2.3 %
   Hull, fittings & equipment: 6,466 tons, 33.1 %
   Fuel, ammunition & stores: 2,646 tons, 13.5 %
   Miscellaneous weights: 6,001 tons, 30.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     77,042 lbs / 34,946 Kg = 713.4 x 6 " / 152 mm shells or 19.2 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 3.8 ft / 1.2 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - 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
   Block coefficient: 0.864
   Length to Beam Ratio: 7.73 : 1
   'Natural speed' for length: 23.62 kts
   Power going to wave formation at top speed: 26 %
   Trim (Max stability = 0, Max steadiness = 100): 28
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      42.65 ft / 13.00 m
      - Forecastle (15 %):   39.37 ft / 12.00 m
      - Mid (50 %):      39.37 ft / 12.00 m
      - Quarterdeck (15 %):   39.37 ft / 12.00 m
      - Stern:      39.37 ft / 12.00 m
      - Average freeboard:   39.57 ft / 12.06 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 58.2 %
      - Above water (accommodation/working, high = better): 336.6 %
   Waterplane Area: 37,073 Square feet or 3,444 Square metres
   Displacement factor (Displacement / loading): 179 %
   Structure weight / hull surface area: 89 lbs/sq ft or 434 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.81
      - Longitudinal: 6.49
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, rides out heavy weather easily

'Bulkhead' 3999
Misc 6001
Hull 6916
1.729 BP for 5,000 troops

17.29 BP/Corps. Not worth it.