Shipbucket

The USN did indeed use airships during and after the war for ASW and AEW purposes. However they were non-rigid blimps and even the biggest ones, the postwar ZPG-3W was only a third the size of what you're proposing.
They were extremely vulnerable targets and were deployed as far away from enemy airpower as physically possible. They didn't cross the Atlantic until mid-1944 and even then they were restricted to the approaches to Gibraltar which was out of reach of Axis airpower.
The problem is that airships only can operate in benign airspace. In WWI that meant flying above the enemy's fighters, but by WWII aircraft performance had improved to the point where that was no longer practical. This is a large part of why Coastal Command never bothered with them and why airborne carriers never really made sense.

Speaking of carriers it's important to remember why they exist. Akron and Shenandoa was built because the fighters of the period had very short range. Once long range fighters became a thing they lost their primary purpose, as shaky as it might have been.

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Worklist

Source Materiel is always welcome.

Good evening all,

Well, to quote Ezgo: "Now for something... Ridiculous..." - you see, while Ezgo's Mammut wasn't exactly a joint effort we were definitely egging each other on. I, alas, have failed to get the thing finished but it's almost April Fool's day here and to be honest I don't really want to wait another year (April 1st seeming to be the only suitable date to release a picture of this nature!). So, another enormous battlecruiser (nope, not a battleship. Not a hope of standing up to comparable return fire.) - for all that it's far, far too big and completely fails to meet any feasibility study you could care to name I've tried to be a little sensible about it - please find below SpringSharp data (yeah, it's going to be a little bit wonky at that sort of size but works within that) and a cleaned-up version of the draft with the various geo tabs taken off - the radars are a late substitution with either DG's or maomatic's Wurzburg Riese (they were originally plain Wurzburg-Ds) and so have rendered that section of the plan view inaccurate. The picture, particularly, is huge, so have a care, those with limited bandwidth. Behold, the H45K (Kreuzer):

H45K_8 Design Study, New Saxe-Weimar-Eisenach Superheavy Battlecruiser laid down 1945

Displacement:
368,304 t light; 395,493 t standard; 430,174 t normal; 457,918 t full load

Dimensions: Length overall / water x beam x draught
2,016.39 ft / 1,968.50 ft x 228.02 ft x 69.88 ft (normal load)
614.59 m / 600.00 m x 69.50 m x 21.30 m

Armament:
9 - 31.50" / 800 mm guns (3x3 guns), 15,652.82lbs / 7,100.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
0.47rpm/barrel for 65,742 lbs / 29,820 kg per minute AP @39,500m or 44,445lbs / 20,160kg per minute HE @ 49,000m
24 - 7.99" / 203 mm guns (8x3 guns), 268.96lbs / 122.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships, 4 raised mounts - superfiring
5rpm/barrel for 32,276lbs / 14,640kg per minute @ 33,500m
36 - 5.00" / 127 mm guns (6x6 guns), 57.32lbs / 26.00kg shells, 1945 Model
Dual purpose guns in turrets (on barbettes)
on side, evenly spread, all raised mounts
10rpm/barrel for 20,635lbs / 9,360kg per minute @ 20,600m / 14,800m AA
72 - 2.17" / 55.0 mm guns (12x6 guns), 4.41lbs / 2.00kg shells, 1945 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
140rpm/barrel for 103,723lbs / 47,040 kg per minute @ 8,000m / 5,500m AA
144 - 1.46" / 37.0 mm guns (24x6 guns), 1.55lbs / 0.70kg shells, 1945 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
32 practical rpm/barrel, 500 burst rpm/barrel for 20,106lbs / 9,139kg (practical) per minute, 314,160lbs / 142,800kg (burst) per minute @ 6,500m / 4,800m AA
Weight of broadside 149,935 lbs / 68,009 kg
Shells per gun, main battery: 200
20 - 24.0" / 610 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 30.5" / 774 mm 1,082.68 ft / 330.00 m 18.18 ft / 5.54 m
Ends: 0.79" / 20 mm 885.79 ft / 269.99 m 18.18 ft / 5.54 m
Upper: 6.50" / 165 mm 1,082.68 ft / 330.00 m 18.18 ft / 5.54 m
Main Belt covers 85 % of normal length

- Torpedo Bulkhead:
3.94" / 100 mm 1,082.68 ft / 330.00 m 59.35 ft / 18.09 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 30.5" / 774 mm 10.2" / 258 mm 30.5" / 774 mm
2nd: 10.2" / 258 mm 3.94" / 100 mm 10.2" / 258 mm
3rd: 5.91" / 150 mm 2.95" / 75 mm 5.91" / 150 mm
4th: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm
5th: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm

- Armour deck: 14.76" / 375 mm, Conning tower: 30.47" / 774 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 8 shafts, 466,490 shp / 348,001 Kw = 30.00 kts
Range 30,000nm at 15.00 kts
Bunker at max displacement = 62,425 tons

Complement:
8,398 - 10,918

Cost:
£209.608 million / $838.430 million

Distribution of weights at normal displacement:
Armament: 18,807 tons, 4.4 %
Armour: 159,556 tons, 37.1 %
- Belts: 32,061 tons, 7.5 %
- Torpedo bulkhead: 9,360 tons, 2.2 %
- Armament: 30,999 tons, 7.2 %
- Armour Deck: 83,394 tons, 19.4 %
- Conning Tower: 3,741 tons, 0.9 %
Machinery: 11,780 tons, 2.7 %
Hull, fittings & equipment: 175,661 tons, 40.8 %
Fuel, ammunition & stores: 61,870 tons, 14.4 %
Miscellaneous weights: 2,500 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
955,798 lbs / 433,543 Kg = 61.2 x 31.5 " / 800 mm shells or 300.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 21.3 ft / 6.5 m
Metacentric height / beam: 0.0935
Roll period: 20.8 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.58
Seaboat quality (Average = 1.00): 1.46

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 8.63 : 1
'Natural speed' for length: 51.36 kts
Power going to wave formation at top speed: 26 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 59.71 ft / 18.20 m
- Forecastle (25 %): 49.87 ft / 15.20 m
- Mid (60 %): 49.87 ft / 15.20 m
- Quarterdeck (20 %): 29.53 ft / 9.00 m
- Stern: 29.53 ft / 9.00 m
- Average freeboard: 44.75 ft / 13.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.3 %
- Above water (accommodation/working, high = better): 306.9 %
Waterplane Area: 305,327 Square feet or 28,366 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 423 lbs/sq ft or 2,064 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.03
- 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
Good seaboat, rides out heavy weather easily

Warning: Calibre too large - Main battery

Misc weight:

6 x 100 ton Fast Attack Craft (S-100 equivalents)
Central missile battery, 4 x armoured-deck-penetrating launch rails.



Obviously, any massive target such as this must necessarily place a heavy premium on it's own survival in the face of what must be presumed to be overwhelming Allied air power - and make no mistake, H45K is truly massive, far beyond any feasibility study it might be subject to. One of the benefits of this is that she has an enormous volume to devote to her own defence, with seven decks underneath her main armour deck. H45K's outer air defence zone is based on the Wasserfall missile, a real-world project in development by Germany at the end of the war that delivered a cut-down V2 derivative and it's almost 250Kg of warhead to anything within 25km. Survivors are then engaged by the six 128mm mounts, each one of each mount's six barrels delivering six rounds per minute for a total of 144 rounds \ min to either broadside and 108 rounds \ min fore-and-aft - just over or just under three tonnes of munitions per minute, depending on the vector of the attack from the 128mm weapons alone. Total output, to compare to other capital ships, is 5616 kilograms or 12,379.5 pounds per minute from her heavy AA.

Inner AA defences are comprised of 55mm and 37mm weapons, 168 and 408 barrels, respectively, throwing 2kg / 4.4lb rounds at 140rpm for the 55mm and 700g / 1.5lb rounds at 192rpm (practical) or 3,000rpm (burst) for the 37mm. Total output from these comes out to 47040kg or 103488lbs per minute for the 55mm, 54835kg or 120637lb per minute for the 37mm, a grand total of 107,383kg or 236,740lb of AA output per minute. The 37mm rotary weapons, with their high burst fire rates - until their magazines are expended - can peak at truly terrifying numbers, the rate reaching 855,003.474 kilograms or 1 884 960 pounds per minute for the 37mm alone (bringing the revised total to 907,666kg or 2,001,062.7 pounds per minute) - for a scant handful of seconds.

Regards,
Adam

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NSWE: viewtopic.php?f=14&t=5695

Hi all,

As posted on the "Cruisers for South America" thread, here are NSWE's cousins to the Leipzig class


SchnellKreuzer 1930, New Saxe-Weimar-Eisenach Light Cruiser laid down 1930

Displacement:
8,751 t light; 9,074 t standard; 9,916 t normal; 10,590 t full load

Dimensions: Length overall / water x beam x draught
599.37 ft / 574.15 ft x 59.06 ft x 21.33 ft (normal load)
182.69 m / 175.00 m x 18.00 m x 6.50 m

Armament:
12 - 5.87" / 149 mm guns (3x4 guns), 100.31lbs / 45.50kg shells, 1930 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
10 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1925 Model
Quick firing guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.64lbs / 0.74kg shells, 1930 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,431 lbs / 649 kg
Shells per gun, main battery: 150
12 - 21.0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 315.78 ft / 96.25 m 9.22 ft / 2.81 m
Ends: 0.79" / 20 mm 258.33 ft / 78.74 m 9.22 ft / 2.81 m
Main Belt covers 85 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
3rd: 1.57" / 40 mm 0.79" / 20 mm -

- Armour deck: 1.57" / 40 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 82,470 shp / 61,522 Kw = 33.00 kts
Range 4,000nm at 19.00 kts
Bunker at max displacement = 1,515 tons

Complement:
496 - 645

Cost:
£3.376 million / $13.505 million

Distribution of weights at normal displacement:
Armament: 180 tons, 1.8 %
Armour: 1,562 tons, 15.8 %
- Belts: 560 tons, 5.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 310 tons, 3.1 %
- Armour Deck: 672 tons, 6.8 %
- Conning Tower: 20 tons, 0.2 %
Machinery: 2,499 tons, 25.2 %
Hull, fittings & equipment: 4,360 tons, 44.0 %
Fuel, ammunition & stores: 1,166 tons, 11.8 %
Miscellaneous weights: 150 tons, 1.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,465 lbs / 6,108 Kg = 133.1 x 5.9 " / 149 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 2.8 ft / 0.9 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.27

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.72 : 1
'Natural speed' for length: 27.47 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (25 %): 24.61 ft / 7.50 m
- Mid (60 %): 24.61 ft / 7.50 m
- Quarterdeck (20 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 22.64 ft / 6.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.9 %
- Above water (accommodation/working, high = better): 152.9 %
Waterplane Area: 23,064 Square feet or 2,143 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 108 lbs/sq ft or 529 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 2.24
- Overall: 1.06
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily


SchnellKreuzer 1938, New Saxe-Weimar-Eisenach Light Cruiser laid down 1930 (Engine 1938)

Displacement:
8,774 t light; 9,133 t standard; 9,916 t normal; 10,543 t full load

Dimensions: Length overall / water x beam x draught
599.37 ft / 574.15 ft x 59.06 ft x 21.33 ft (normal load)
182.69 m / 175.00 m x 18.00 m x 6.50 m

Armament:
6 - 7.99" / 203 mm guns (3x2 guns), 268.96lbs / 122.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
10 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1930 Model
Quick firing guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1930 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 1,853 lbs / 840 kg
Shells per gun, main battery: 150
12 - 21.0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 315.78 ft / 96.25 m 9.22 ft / 2.81 m
Ends: 0.79" / 20 mm 258.33 ft / 78.74 m 9.22 ft / 2.81 m
Main Belt covers 85 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
3rd: 1.57" / 40 mm 0.79" / 20 mm -

- Armour deck: 1.57" / 40 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 91,270 shp / 68,088 Kw = 33.86 kts
Range 4,000nm at 19.00 kts
Bunker at max displacement = 1,410 tons

Complement:
496 - 645

Cost:
£3.519 million / $14.077 million

Distribution of weights at normal displacement:
Armament: 220 tons, 2.2 %
Armour: 1,585 tons, 16.0 %
- Belts: 560 tons, 5.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 333 tons, 3.4 %
- Armour Deck: 672 tons, 6.8 %
- Conning Tower: 20 tons, 0.2 %
Machinery: 2,499 tons, 25.2 %
Hull, fittings & equipment: 4,310 tons, 43.5 %
Fuel, ammunition & stores: 1,142 tons, 11.5 %
Miscellaneous weights: 160 tons, 1.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,824 lbs / 5,817 Kg = 50.2 x 8.0 " / 203 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.7 ft / 0.8 m
Roll period: 15.0 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.18

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.72 : 1
'Natural speed' for length: 27.47 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (25 %): 24.61 ft / 7.50 m
- Mid (60 %): 24.61 ft / 7.50 m
- Quarterdeck (20 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 22.64 ft / 6.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.1 %
- Above water (accommodation/working, high = better): 152.9 %
Waterplane Area: 23,064 Square feet or 2,143 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 107 lbs/sq ft or 524 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.18
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent


SchnellKreuzer 1943_203, New Saxe-Weimar-Eisenach Light Cruiser laid down 1930 (Engine 1943)

Displacement:
8,801 t light; 9,166 t standard; 9,916 t normal; 10,517 t full load

Dimensions: Length overall / water x beam x draught
599.37 ft / 574.15 ft x 59.06 ft x 21.33 ft (normal load)
182.69 m / 175.00 m x 18.00 m x 6.50 m

Armament:
6 - 7.99" / 203 mm guns (3x2 guns), 268.96lbs / 122.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
4 - 4.13" / 105 mm guns (2x2 guns), 34.83lbs / 15.80kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
4 - 4.13" / 105 mm guns (2x2 guns), 34.83lbs / 15.80kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1942 Model
Quick firing guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 1,911 lbs / 867 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 315.78 ft / 96.25 m 9.22 ft / 2.81 m
Ends: 0.79" / 20 mm 258.33 ft / 78.74 m 9.22 ft / 2.81 m
Main Belt covers 85 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
3rd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
4th: 1.57" / 40 mm 0.79" / 20 mm -

- Armour deck: 1.57" / 40 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 96,765 shp / 72,187 Kw = 34.36 kts
Range 4,000nm at 19.00 kts
Bunker at max displacement = 1,351 tons

Complement:
496 - 645

Cost:
£3.556 million / $14.224 million

Distribution of weights at normal displacement:
Armament: 229 tons, 2.3 %
Armour: 1,579 tons, 15.9 %
- Belts: 560 tons, 5.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 327 tons, 3.3 %
- Armour Deck: 672 tons, 6.8 %
- Conning Tower: 20 tons, 0.2 %
Machinery: 2,499 tons, 25.2 %
Hull, fittings & equipment: 4,374 tons, 44.1 %
Fuel, ammunition & stores: 1,115 tons, 11.2 %
Miscellaneous weights: 120 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,745 lbs / 5,781 Kg = 49.9 x 8.0 " / 203 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.7 ft / 0.8 m
Roll period: 15.0 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.65
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.72 : 1
'Natural speed' for length: 27.47 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (25 %): 24.61 ft / 7.50 m
- Mid (60 %): 24.61 ft / 7.50 m
- Quarterdeck (20 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 22.64 ft / 6.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.4 %
- Above water (accommodation/working, high = better): 202.1 %
Waterplane Area: 23,064 Square feet or 2,143 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 109 lbs/sq ft or 531 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent


SchnellKreuzer 1943_149, New Saxe-Weimar-Eisenach Light Cruiser laid down 1930 (Engine 1943)

Displacement:
8,822 t light; 9,166 t standard; 9,916 t normal; 10,517 t full load

Dimensions: Length overall / water x beam x draught
599.37 ft / 574.15 ft x 59.06 ft x 21.33 ft (normal load)
182.69 m / 175.00 m x 18.00 m x 6.50 m

Armament:
12 - 5.87" / 149 mm guns (3x4 guns), 100.31lbs / 45.50kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
4 - 4.13" / 105 mm guns (2x2 guns), 34.83lbs / 15.80kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 4.13" / 105 mm guns (4x2 guns), 34.83lbs / 15.80kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1942 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,634 lbs / 741 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 315.78 ft / 96.25 m 9.22 ft / 2.81 m
Ends: 0.79" / 20 mm 258.33 ft / 78.74 m 9.22 ft / 2.81 m
Main Belt covers 85 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
3rd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
4th: 1.57" / 40 mm 0.79" / 20 mm -

- Armour deck: 1.57" / 40 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 96,765 shp / 72,187 Kw = 34.36 kts
Range 4,000nm at 19.00 kts
Bunker at max displacement = 1,351 tons

Complement:
496 - 645

Cost:
£3.479 million / $13.915 million

Distribution of weights at normal displacement:
Armament: 206 tons, 2.1 %
Armour: 1,568 tons, 15.8 %
- Belts: 560 tons, 5.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 316 tons, 3.2 %
- Armour Deck: 672 tons, 6.8 %
- Conning Tower: 20 tons, 0.2 %
Machinery: 2,499 tons, 25.2 %
Hull, fittings & equipment: 4,428 tons, 44.7 %
Fuel, ammunition & stores: 1,094 tons, 11.0 %
Miscellaneous weights: 120 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,179 lbs / 5,978 Kg = 130.3 x 5.9 " / 149 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.8 ft / 0.8 m
Roll period: 15.0 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.72 : 1
'Natural speed' for length: 27.47 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (25 %): 24.61 ft / 7.50 m
- Mid (60 %): 24.61 ft / 7.50 m
- Quarterdeck (20 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 22.64 ft / 6.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.6 %
- Above water (accommodation/working, high = better): 202.1 %
Waterplane Area: 23,064 Square feet or 2,143 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 110 lbs/sq ft or 538 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 2.25
- Overall: 1.04
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Originally commissioned in 1930, the Schnellkreuzer 1930 class were intended right from the word go to operate as versatile, go-anywhere, do-anything ships, with intended roles including commerce protection, commerce raiding, flagship roles for destroyer flotillas and, if necessary, teaming up to take on heavier ships with either gunfire or torpedoes. Designed within the constraints of the London Naval Treaty, the CL-1930 class shipped with three quadruple 149.1mm/60 turrets, providing a powerful counter to destroyers and other light cruisers. These ships also marked the start of a trend within NSWE naval construction, being the first ships to take NSWE's distinctive turbo-electric drive, with boilers along the sides and a unit machinery layout for turbines, diesels and M/G sets down the middle - only two units, on the CL-1930, rather than three on later ships, due to the lack of engineering space. The initial production run was one of NSWE's largest, reflecting the multitude of roles these ships were intended to take on - five ships each for Pepys Island, South Georgia, Saxemburg Island and Thompson Island on the initial order, though the numbers for Saxemburg Island and Thompson Island were cut to three each after cost over-runs, then re-instated, but with the "additional" four for sale to Argentina - relations between New Saxe-Weimar-Eisenach and Argentina were quite good at this time, NSWE having the cash balance to trade effectively with the resource-rich but cash-poor nation - NSWE had pursued this relationship to provide some security from the British forces in the Falklands - while not at war, the Royal Navy were obviously the dominant force in the area and the House of Friedrich were wary of becoming a rich, poorly defended jewel (particularly the Pepys Island group, close to the Falklands, NSWE's seat of government and, perhaps more importantly, home to the majority of NSWE's heavy industry, fuelling the rest of NSWE's economy), liable to be picked off at need by a more powerful neighbour.

Starting in 1938, with the treaties being honoured more in the breach than the observance, the CL-1930 class are brought in, one or two ships at a time, for refit to the 1930 Ausf. 38 standard. An austere refit, this replaced the 149.1mm quads with 203mm twins, actually substantially decreasing the ship's throw weight in unit time (firing at maximum rate, the 149.1mm quads permit the CL-1930 to throw about 6,500kg of steel and HE down range in one minute of fire, compared to about 3,500kg of steel and HE for the 203mm twins for the CL-1930/38), but vastly improving penetration at long ranges. Heavy AA armaments were also upgraded to a long-barrelled 88mm, largely to avoid having to make significant changes to the superstructure. The engines and boilers, serviced and re-rated for higher pressures, deliver slightly more power than before.

By 1943, even the CL-1930/38 are due for some attention. Priority is given to the CL-1930 that were not refitted first time around, one ship each from the Saxemburg and Thompson Island flotillas, acting as trial ships for the CL-1930 Ausf. 43 refit. These ships still carry their original 149.1mm quads, which are left in place, as Bauamt, in consultation with Betriebsamt, start to refurbish the 149.1mm quads placed in storage from the 1930/38 refit. The lower throw weight and lower number of shells (and fewer barrels than the Admiral Hipper-class) has left the CL-1930/38 at something of a disadvantage when engaging RN destroyer groups, who have taken to trying to draw the destroyer screen away and rushing the CL-1930/38s if this succeeds, relying on the CL-1930/38's lower rate of fire to allow safe movement into their own firing range. At Betriebsamt's request, one ship of each patrolling pair of CL-1930s is to be refitted to CL-1930/43/149 standard, allowing it to keep RN destroyer groups from closing. Once the 203mm refits are completed, this is also found to be advantageous for another reason: the higher topweight of the 203mm guns does not permit a full heavy AA suite, the CL-1930/43/203 ships having to land a pair of 10.5cm /65 SK C/33 and replace them with 3.7cm/69 M42s. With the capture of the Falklands and more area to protect (and a requirement to replace wartime losses) some new hulls are constructed, these largely being the hulls to take the 149.1mm quads. Once again, work is undertaken on the engines to maintain speed - NSWE's practice of using turbo-electric propulsion, while having some pitfalls, permits installation of still higher-pressure boilers and a change to turbo-diesels for cruising with very few changes outside of the engine and boiler rooms, and with only one turbine and one set of steam lines, rather than two or three, NSWE can implement higher-pressure boilers in particular more easily and more reliably than the Kriegsmarine.

Regards,
Adam

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These are nice, but IMHO the propellers on your ships are too small, and I fail to see the reason for the Voith Schneider propeller on all ships ( it does not replace a bow thruster in any way)

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"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"

Hi Novice,

Thanks for the comments. The prop did seem a little small, but the scaling maths seemed to work out correctly. I'll check it again to see of I missed anything.

Re the VS props, I'd understood that two were installed on the Graf Zeppelin for precisely that purpose. Have I misunderstood the design or purpose of those somewhere?

Regards,
Adam

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could you also use dark red instead for brown as shading on the underwater hull. we don't use brown as shading anymore, it's something we did back in the days, and are also not correct color to use when shading underwater hull.

The VS could be used for slow maneuvering, like docking, but were also for stabilising the ship in the Kiel channel: Too much area for side winds.

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Any help and source material is always welcome.

Was that not the reason for Graf Zeppelin having them?

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As far as my reading on the matter has gone, yes, the VS props were for docking assistance, steering at up to 12kn and propulsion at up to 4kn - both of those last two in an emergency, obviously. CL-1930 only has a single VS as I'd figured that with it's shorter, lower silhouette (and turbo-electric \ diesel-electric propulsion) it's going to be able to manage both docking speeds and sidewinds using only main propulsion a little better than an aircraft carrier.

Oh, also, spotted the problem with the prop scaling - the only KM ship I was able to easily find prop dimensions for was Bismarck - as the props are the 90%-of-the-disc types Bismarck had I was trying to stick to KM types - but when I scaled down I hadn't factored in the reduced efficiency. Will re-do the props off Konigsberg's dimensions and put the pictures up again- the colour's already changed as per Heuhen.

Regards,
Adam

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Heavy Cruiser CA'41

PanzerSchiff 1944, New Saxe-Weimer-Eisenach Heavy Cruiser laid down 1941

Displacement:
14,671 t light; 15,648 t standard; 17,424 t normal; 18,846 t full load

Dimensions: Length overall / water x beam x draught
700.93 ft / 672.57 ft x 73.82 ft x 25.59 ft (normal load)
213.64 m / 205.00 m x 22.50 m x 7.80 m

Armament:
9 - 7.99" / 203 mm guns (3x3 guns), 268.96lbs / 122.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft, 1 raised mount aft - superfiring
28 - 5.04" / 128 mm guns (14x2 guns), 57.32lbs / 26.00kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
20 - 2.17" / 55.0 mm guns (10x2 guns), 4.41lbs / 2.00kg shells, 1944 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1942 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 4,145 lbs / 1,880 kg
Shells per gun, main battery: 250

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 475.72 ft / 145.00 m 9.97 ft / 3.04 m
Ends: 0.98" / 25 mm 196.85 ft / 60.00 m 9.97 ft / 3.04 m
Upper: 1.97" / 50 mm 475.72 ft / 145.00 m 8.01 ft / 2.44 m
Main Belt covers 109 % of normal length

- Torpedo Bulkhead:
0.98" / 25 mm 475.72 ft / 145.00 m 22.54 ft / 6.87 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.87" / 200 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 5.04" / 128 mm 2.52" / 64 mm 5.04" / 128 mm
3rd: 2.17" / 55 mm 1.18" / 30 mm 2.17" / 55 mm
4th: 1.57" / 40 mm 0.79" / 20 mm -

- Armour deck: 1.97" / 50 mm, Conning tower: 9.84" / 250 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 98,237 shp / 73,285 Kw = 32.00 kts
Range 7,000nm at 19.00 kts
Bunker at max displacement = 3,198 tons

Complement:
757 - 985

Cost:
£8.799 million / $35.195 million

Distribution of weights at normal displacement:
Armament: 528 tons, 3.0 %
Armour: 4,124 tons, 23.7 %
- Belts: 1,154 tons, 6.6 %
- Torpedo bulkhead: 390 tons, 2.2 %
- Armament: 1,208 tons, 6.9 %
- Armour Deck: 1,230 tons, 7.1 %
- Conning Tower: 143 tons, 0.8 %
Machinery: 2,509 tons, 14.4 %
Hull, fittings & equipment: 7,511 tons, 43.1 %
Fuel, ammunition & stores: 2,753 tons, 15.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,767 lbs / 13,502 Kg = 116.6 x 8.0 " / 203 mm shells or 4.2 torpedoes
Stability (Unstable if below 1.00): 1.04
Metacentric height 3.4 ft / 1.0 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.80
Seaboat quality (Average = 1.00): 1.45

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.11 : 1
'Natural speed' for length: 29.89 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.50 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 39.37 ft / 12.00 m
- Forecastle (25 %): 29.53 ft / 9.00 m
- Mid (60 %): 29.53 ft / 9.00 m (19.69 ft / 6.00 m aft of break)
- Quarterdeck (20 %): 19.69 ft / 6.00 m
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 26.57 ft / 8.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.5 %
- Above water (accommodation/working, high = better): 220.5 %
Waterplane Area: 33,773 Square feet or 3,138 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 134 lbs/sq ft or 655 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.92
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

This design represents probably the most useful design that the Bauamt created in the war. Roughly comparable to the Kriegsmarine Admiral Hipper class, the '41 design was optimised for fighting at distances the Hippers were unlikely to encounter, with triple turrets to shorten the armoured citadel and heavier deck amour. Turbo-electric propulsion and a unit machinery layout (boilers down the outsides, turbine/condenser-motor/generator-diesels on the inside) gave the ships a robust construction with the ability to power increasingly demanding electronics as the war progressed. The '41 design comprised 5 ships, one completed in early 1943, commissioned in early 1944, one completed late 1943, commissioned in mid 1944 and the last completed early 1944, commissioned in early 1945. The remaining two ships were in one case cancelled prior to construction began, in the other broken up at 15% completion to free up steel for other projects.
Of the three completed ships, only one survived the war, the first loss, actually the second ship commissioned, in late 1944 while escorting a convoy breaking out past the combined USN / RN blockade. The next loss came after the blockade of the home islands tightened after Germany fell. The third and last ship completed survived the war and served until the early 1950s, wartime construction limiting the service life of the ship.

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