Kingdom auxilliary II

[Korpen]

A ship intended mainly for strategic (port-port) transport of smaller torpedoboots and costal submarines. She is not intended for operational deployment of the cargo, but it would not be impossible, at least not if more support ships are available. And other function she should be able to carry out is retrieval of damaged smaller ship if damaged far from own bases.
Bit uncertain what is suitable weight for the cranes, as gantry cranes seems to generally have a very good lift-to own weight ratio. But about 200ton lift each I feel is quite certain, perhaps as much as 350ton (which would allow for transport of K1-subs). She got space for about eight KTB-1 boats, however as she is draw that is not possible to lift boats of more then 50m length.
Fuel load is very large allowing her a operate at full speed between ports as far apart as 7000nm, also allows her to function as an auxiliary tanker. Manipulation of the distribution of the fuel (or ballast) can also be usefull to assist in lifts.


Lifter, Netherlands Auxilliary laid down 1916


Displacement:
   4 800 t light; 4 962 t standard; 7 300 t normal; 9 170 t full load

Dimensions: Length overall / water x beam x draught
   479,65 ft / 459,32 ft x 65,62 ft x 14,76 ft (normal load)
   146,20 m / 140,00 m x 20,00 m  x 4,50 m

Armament:
      2 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1916 Model
     Quick firing guns in deck mounts
     on side, all forward, all raised mounts - superfiring
      1 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1916 Model
     Quick firing gun in deck mount
     on centreline aft, 1 raised gun
   Weight of broadside 62 lbs / 28 kg
   Shells per gun, main battery: 420

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 15 896 shp / 11 858 Kw = 21,00 kts
   Range 28 590nm at 12,00 kts
   Bunker at max displacement = 4 208 tons

Complement:
   394 - 513

Cost:
   £0,421 million / $1,685 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 0,1 %
   Machinery: 592 tons, 8,1 %
   Hull, fittings & equipment: 2 050 tons, 28,1 %
   Fuel, ammunition & stores: 2 500 tons, 34,2 %
   Miscellaneous weights: 2 150 tons, 29,5 %
   - 2x gangrty cranes: 800 ton
   - Cargo: 1300 (more if less fuel is carried)
   - Refueling gear and pumps: 50 ton

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14 306 lbs / 6 489 Kg = 688,0 x 3,5 " / 88 mm shells or 2,7 torpedoes
   Stability (Unstable if below 1.00): 1,45
   Metacentric height 5,1 ft / 1,5 m
   Roll period: 12,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0,00
   Seaboat quality  (Average = 1.00): 1,52

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0,574
   Length to Beam Ratio: 7,00 : 1
   'Natural speed' for length: 21,43 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 33
   Bow angle (Positive = bow angles forward): 30,00 degrees
   Stern overhang: 3,28 ft / 1,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      29,53 ft / 9,00 m
      - Forecastle (13 %):   24,61 ft / 7,50 m (11,48 ft / 3,50 m aft of break)
      - Mid (50 %):      11,48 ft / 3,50 m
      - Quarterdeck (11 %):   24,61 ft / 7,50 m (11,48 ft / 3,50 m before break)
      - Stern:      24,61 ft / 7,50 m
      - Average freeboard:   14,89 ft / 4,54 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 60,3 %
      - Above water (accommodation/working, high = better): 119,4 %
   Waterplane Area: 21 517 Square feet or 1 999 Square metres
   Displacement factor (Displacement / loading): 215 %
   Structure weight / hull surface area: 72 lbs/sq ft or 350 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1,01
      - Longitudinal: 0,99
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Desertfox]

Sweet ships, I should build something similar for the Turbinias.

[miketr]

The Japanese had something like that for their mini / small subs as I recall was able to lift them and carry them long distances.  Also was designed out right as a tender also though.

[Kaiser Kirk]

I like the concept.
During peacetime she will be a convieniant explanation for how home-built small combatants can wind up in the DEI. During wartime, it's nice flexibilty.
Would it be feasible to allocate some weight to repair and support facilities. That way instead of taking a smaller vessel on and taking to dry dock, she could do the repair herself ?

[TexanCowboy]

If its ment to retrieve ships far from home base, I would add some larger guns, some 5.51's, 4.72's, or 5.91's