WesWorld

An auxilliary for the Kriegsmarine.

Dithmarschen, German Fleet Tanker laid down 1931

Displacement:
6,565 t light; 6,874 t standard; 14,616 t normal; 20,809 t full load

Dimensions: Length overall / water x beam x draught
584.64 ft / 573.00 ft x 72.18 ft x 21.33 ft (normal load)
178.20 m / 174.65 m x 22.00 m x 6.50 m

Armament:
4 - 4.13" / 105 mm guns (2x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 154 lbs / 70 kg
Shells per gun, main battery: 180

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 22,712 shp / 16,944 Kw = 21.10 kts
Range 50,000nm at 15.00 kts
Bunker at max displacement = 13,936 tons

Complement:
664 - 864

Cost:
£1.488 million / $5.952 million

Distribution of weights at normal displacement:
Armament: 19 tons, 0.1 %
Armour: 13 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 679 tons, 4.6 %
Hull, fittings & equipment: 3,854 tons, 26.4 %
Fuel, ammunition & stores: 8,051 tons, 55.1 %
Miscellaneous weights: 2,000 tons, 13.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
54,187 lbs / 24,579 Kg = 1,534.1 x 4.1 " / 105 mm shells or 7.3 torpedoes
Stability (Unstable if below 1.00): 1.53
Metacentric height 6.3 ft / 1.9 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 86 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.72

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.580
Length to Beam Ratio: 7.94 : 1
'Natural speed' for length: 23.94 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 16.77 ft / 5.11 m (16.40 ft / 5.00 m aft of break)
- Mid (50 %): 16.40 ft / 5.00 m
- Quarterdeck (20 %): 16.40 ft / 5.00 m
- Stern: 16.77 ft / 5.11 m
- Average freeboard: 17.01 ft / 5.18 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 32.5 %
- Above water (accommodation/working, high = better): 139.7 %
Waterplane Area: 29,687 Square feet or 2,758 Square metres
Displacement factor (Displacement / loading): 415 %
Structure weight / hull surface area: 92 lbs/sq ft or 449 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.03
- Longitudinal: 1.00
- Overall: 1.01
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, can fire her guns in the heaviest weather

With 12,500 nm of fuel reserved for it's own use (3583 tons), the Dithmarschen-class ships can carry an additional 10353 tons of fuel.

Is she based on any particular vessel?

She is absolutely massive. The largest tanker around this time was SS Ohio of c. 9300tons and 485ft long with a speed of 16knts.

She's based (as exactly as I could do it) on the historical German Dithmarschen class ships. See here for the historical ship's details. Major differences are that this version foregoes the historical ship's 15cm guns for DP 10.5cm guns, and the hull lacks the low freeboard in the middle of the ship that the historical version had. I'm working on a version that has that lower freeboard.

Revised design, to get the low freeboard in the midships area common to tankers of the day.

Dithmarschen, German Fleet Tanker laid down 1931

Displacement:
7,332 t light; 7,641 t standard; 14,616 t normal; 20,196 t full load

Dimensions: Length overall / water x beam x draught
584.64 ft / 573.00 ft x 72.18 ft x 21.33 ft (normal load)
178.20 m / 174.65 m x 22.00 m x 6.50 m

Armament:
4 - 4.13" / 105 mm guns (2x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 154 lbs / 70 kg
Shells per gun, main battery: 180

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 22,712 shp / 16,944 Kw = 21.10 kts
Range 45,000nm at 15.00 kts
Bunker at max displacement = 12,555 tons

Complement:
664 - 864

Cost:
£1.605 million / $6.421 million

Distribution of weights at normal displacement:
Armament: 19 tons, 0.1 %
Armour: 13 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 679 tons, 4.6 %
Hull, fittings & equipment: 4,620 tons, 31.6 %
Fuel, ammunition & stores: 7,284 tons, 49.8 %
Miscellaneous weights: 2,000 tons, 13.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,948 lbs / 19,934 Kg = 1,244.2 x 4.1 " / 105 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.55
Metacentric height 6.4 ft / 2.0 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.31

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.580
Length to Beam Ratio: 7.94 : 1
'Natural speed' for length: 23.94 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (20 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m before break)
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 13.16 ft / 4.01 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 32.5 %
- Above water (accommodation/working, high = better): 83.8 %
Waterplane Area: 29,687 Square feet or 2,758 Square metres
Displacement factor (Displacement / loading): 415 %
Structure weight / hull surface area: 116 lbs/sq ft or 564 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.43
- Longitudinal: 0.97
- Overall: 1.07
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

With 12,500 nm of fuel reserved for it's own use (3583 tons), the Dithmarschen-class ships can carry an additional 8972 tons of fuel.

I'm not sure how the armament will be placed, but if you keep it similar to the Dithmarschen, then all the guns should be superfiring.

Gun mountings are not intended to be exactly the same as the historical ship, since there's no provision for hiding them on this version. The intention is to have one 10.5cm mounting at the stern and another probably just aft of the forecastle, on the centerline, with the 37mm mountings either side of the forward and aft superstructure. But yes, at least the forward 10.5cm mounting and the forward 37mm mountings should be raised mounts.


Dithmarschen, German Fleet Tanker laid down 1931

Displacement:
7,332 t light; 7,641 t standard; 14,616 t normal; 20,196 t full load

Dimensions: Length overall / water x beam x draught
584.64 ft / 573.00 ft x 72.18 ft x 21.33 ft (normal load)
178.20 m / 174.65 m x 22.00 m x 6.50 m

Armament:
4 - 4.13" / 105 mm guns (2x2 guns), 35.32lbs / 16.02kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
Weight of broadside 154 lbs / 70 kg
Shells per gun, main battery: 180

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 22,712 shp / 16,944 Kw = 21.10 kts
Range 45,000nm at 15.00 kts
Bunker at max displacement = 12,555 tons

Complement:
664 - 864

Cost:
£1.605 million / $6.421 million

Distribution of weights at normal displacement:
Armament: 19 tons, 0.1 %
Armour: 13 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 679 tons, 4.6 %
Hull, fittings & equipment: 4,620 tons, 31.6 %
Fuel, ammunition & stores: 7,284 tons, 49.8 %
Miscellaneous weights: 2,000 tons, 13.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,927 lbs / 19,925 Kg = 1,243.6 x 4.1 " / 105 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.55
Metacentric height 6.4 ft / 2.0 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.31

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.580
Length to Beam Ratio: 7.94 : 1
'Natural speed' for length: 23.94 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (20 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m before break)
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 13.16 ft / 4.01 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 32.5 %
- Above water (accommodation/working, high = better): 83.8 %
Waterplane Area: 29,687 Square feet or 2,758 Square metres
Displacement factor (Displacement / loading): 415 %
Structure weight / hull surface area: 116 lbs/sq ft or 564 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.43
- Longitudinal: 0.97
- Overall: 1.07
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

With 12,500 nm of fuel reserved for it's own use (3583 tons), the Dithmarschen-class ships can carry an additional 8972 tons of fuel.

As tankers are "cargo vessels for liquids" shouldn't the misc weight be higher and the ship's own bunkerage be lower??

From the SS notes....
Transports and merchant ships: The "miscellaneous weight" feature of the program allows weight to be reserved for cargo capacity. So to give a ship a cargo capacity of 10,000 tons, simply provide that much miscellaneous weight.

One one hand it should use the miscellaneous weights.
On the other hand the miscellaneous weights is situated above the freeboard. And where do you store the fuel, or cargo or the ballast of a submarine for that matter (in SS that is)?

Of Glug, the differences are dramatic!!!!


Glug (a) (working title!), Iberia Oiler laid down 1931

Displacement:
10,301 t light; 10,557 t standard; 12,305 t normal; 13,703 t full load

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 1 shaft, 17,695 shp / 13,200 Kw = 20.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 3,146 tons

Cost:
£1.902 million / $7.608 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.0 %
Armour: 5 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 529 tons, 4.3 %
Hull, fittings & equipment: 3,065 tons, 24.9 %
Fuel, ammunition & stores: 2,004 tons, 16.3 %
Miscellaneous weights: 6,700 tons, 54.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,657 lbs / 7,102 Kg = 10,130.7 x 1.5 " / 37 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 4.9 ft / 1.5 m
Roll period: 15.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.50

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 74.0 %
- Above water (accommodation/working, high = better): 106.2 %
Waterplane Area: 27,079 Square feet or 2,516 Square metres
Displacement factor (Displacement / loading): 158 %
Structure weight / hull surface area: 85 lbs/sq ft or 416 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.07
- 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

Misc weight = 6500 tons for oil and 200 tons for pumping and firefighting equipment


and the cheat.....

Glug (cheat), Iberia Oiler laid down 1931

Displacement:
4,399 t light; 4,656 t standard; 12,305 t normal; 18,424 t full load

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 1 shaft, 17,695 shp / 13,200 Kw = 20.00 kts
Range 54,000nm at 15.00 kts
Bunker at max displacement = 13,768 tons

Cost:
£1.001 million / $4.003 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.0 %
Armour: 5 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 529 tons, 4.3 %
Hull, fittings & equipment: 3,064 tons, 24.9 %
Fuel, ammunition & stores: 7,905 tons, 64.2 %
Miscellaneous weights: 800 tons, 6.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
71,167 lbs / 32,281 Kg = 46,047.2 x 1.5 " / 37 mm shells or 11.7 torpedoes
Stability (Unstable if below 1.00): 2.31
Metacentric height 13.4 ft / 4.1 m
Roll period: 9.4 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.73

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 22.9 %
- Above water (accommodation/working, high = better): 106.2 %
Waterplane Area: 27,079 Square feet or 2,516 Square metres
Displacement factor (Displacement / loading): 656 %
Structure weight / hull surface area: 85 lbs/sq ft or 416 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.07
- 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

I'd go for Glug (a). Why? The oil that is the cargo of the ship should be subtracted from the light displacement because cargo is not included. This will give you 3801 tons for the light displacement which is 598 tons of materials cheaper than Glug (cheat).

There is one other thing. When using the range to sim the oil, you're actually stuck to the oil only. When using the miscellaneous weights, you can easily use other liquid materials in the tanks when necessary.

well, I'm building GLUG (A) anyway,
but why subtract the misc weight....I was made pay for it with LOKI!!

DOn't forget the damage resistance differences

Quoted

but why subtract the misc weight....I was made pay for it with LOKI!!

Why? Warship materials = solid. Oil = fluid. Why waste solid materials on fluids?
Besides fluid stuff is not included in the standard and light displacements. Besides if people use range to sim the oil cargo on a tanker, it seems only fair to do so since with that one, the oil is automatically subtracted from standard and light displacements.

Quoted

DOn't forget the damage resistance differences

Miscellaneous weights = bad for damage resistance.