Ersatz Roon

[Sachmle]

Ersatz Roon, Brandenburg Schlachtkreuzer laid down 1918 (Engine 1916)

Displacement:
   30,000 t light; 31,368 t standard; 33,500 t normal; 35,206 t full load

Dimensions: Length overall / water x beam x draught
   721.80 ft / 715.22 ft x 95.31 ft x 30.35 ft (normal load)
   220.00 m / 218.00 m x 29.05 m  x 9.25 m

Armament:
     8 - 13.78" / 350 mm guns (4x2 guns), 1,322.77lbs / 600.00kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
     14 - 5.91" / 150 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1908 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     14 guns in hull casemates - Limited use in heavy seas
     4 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1918 Model
     Anti-aircraft guns in deck mounts with hoists
     on side, all amidships, all raised mounts - superfiring
     5 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1905 Model
     Quick firing guns in casemate mounts
     4 on side, evenly spread 1 aft
     5 guns in hull casemates - Limited use in heavy seas
     4 - 1.97" / 50.0 mm guns in single mounts, 3.86lbs / 1.75kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on centreline ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 12,251 lbs / 5,557 kg
   Shells per gun, main battery: 100
   4 - 19.7" / 500 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   465.06 ft / 141.75 m   16.40 ft / 5.00 m
   Ends:   3.94" / 100 mm   250.16 ft / 76.25 m   11.48 ft / 3.50 m
   Upper:   5.91" / 150 mm   465.06 ft / 141.75 m   8.20 ft / 2.50 m
     Main Belt covers 100 % of normal length

  - Torpedo Bulkhead:
      1.77" / 45 mm   465.06 ft / 141.75 m   38.55 ft / 11.75 m

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   4.53" / 115 mm      11.0" / 280 mm
   2nd:   5.91" / 150 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   1.97" / 50 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   3.94" / 100 mm   1.97" / 50 mm      2.95" / 75 mm
   5th:   0.98" / 25 mm         -               -

  - Armour deck: 2.95" / 75 mm, Conning tower: 11.81" / 300 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 104,000 shp / 77,584 Kw = 28.02 kts
   Range 10,000nm at 12.00 kts
   Bunker at max displacement = 3,838 tons

Complement:
   1,237 - 1,609

Cost:
   £5.743 million / $22.973 million

Distribution of weights at normal displacement:
   Armament: 1,523 tons, 4.5 %
   Armour: 11,825 tons, 35.3 %
      - Belts: 5,253 tons, 15.7 %
      - Torpedo bulkhead: 1,175 tons, 3.5 %
      - Armament: 2,492 tons, 7.4 %
      - Armour Deck: 2,640 tons, 7.9 %
      - Conning Tower: 264 tons, 0.8 %
   Machinery: 3,875 tons, 11.6 %
   Hull, fittings & equipment: 12,277 tons, 36.6 %
   Fuel, ammunition & stores: 3,500 tons, 10.4 %
   Miscellaneous weights: 500 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     44,790 lbs / 20,316 Kg = 34.2 x 13.8 " / 350 mm shells or 6.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 63 %
         - Recoil effect (Restricted arc if above 1.00): 0.65
   Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.567
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 26.74 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): 12.35 degrees
   Stern overhang: -4.10 ft / -1.25 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.02 ft / 9.15 m
      - Forecastle (20 %):   24.61 ft / 7.50 m
      - Mid (74 %):      24.61 ft / 7.50 m (16.40 ft / 5.00 m aft of break)
      - Quarterdeck (10 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   22.91 ft / 6.98 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.6 %
      - Above water (accommodation/working, high = better): 169.2 %
   Waterplane Area: 48,328 Square feet or 4,490 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 176 lbs/sq ft or 857 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.34
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

250t 1908 Fire Control
25t Long Range Markoni Installation
25t 1905 Sehendes Auge
25t 1912 Starshells for the 88mm guns + Large Seachlights
100t Berthing and supplies for 50 Strumtruppen
25t Contruction Reserve

[mentat]

Very nice - very balanced design - everyone will want one  :)

Minor queries:

Seaboat seems bit high vs. stab + stdness more modest - any way to shift the emphasis - personally I think they are both more useful on Big ships

Is Belt sloped ? - if not another 20-30mm would be good for future proofing vs. Big Boys with 15" 

[Sachmle]

Took some compromise, mostly added weight and lower L/B, but managed 1.10/70/1.22 for stability/steadiness/seakeeping..which is basically my goal each time.

Ersatz Roon, Brandenburg Schlachtkreuzer laid down 1918 (Engine 1916)

Displacement:
   32,600 t light; 33,957 t standard; 36,194 t normal; 37,984 t full load

Dimensions: Length overall / water x beam x draught
   721.80 ft / 715.22 ft x 102.20 ft x 30.38 ft (normal load)
   220.00 m / 218.00 m x 31.15 m  x 9.26 m

Armament:
      8 - 13.78" / 350 mm guns (4x2 guns), 1,322.77lbs / 600.00kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      14 - 5.91" / 150 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1908 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     14 guns in hull casemates - Limited use in heavy seas
      4 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships
      5 - 4.72" / 120 mm guns in single mounts, 52.91lbs / 24.00kg shells, 1918 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     5 guns in hull casemates - Limited use in heavy seas
      4 - 1.97" / 50.0 mm guns in single mounts, 3.86lbs / 1.75kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on centreline ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 12,339 lbs / 5,597 kg
   Shells per gun, main battery: 90
   4 - 19.7" / 500 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   465.06 ft / 141.75 m   16.40 ft / 5.00 m
   Ends:   3.94" / 100 mm   235.40 ft / 71.75 m   9.84 ft / 3.00 m
     14.76 ft / 4.50 m Unarmoured ends
   Upper:   5.91" / 150 mm   364.83 ft / 111.20 m   16.40 ft / 5.00 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.77" / 45 mm   465.06 ft / 141.75 m   38.55 ft / 11.75 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   4.72" / 120 mm      11.0" / 280 mm
   2nd:   5.91" / 150 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   3.94" / 100 mm   1.97" / 50 mm      2.95" / 75 mm

   - Armour deck: 3.94" / 100 mm, Conning tower: 11.81" / 300 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 110,168 shp / 82,185 Kw = 28.00 kts
   Range 10,000nm at 12.00 kts
   Bunker at max displacement = 4,027 tons

Complement:
   1,311 - 1,705

Cost:
   £6.008 million / $24.031 million

Distribution of weights at normal displacement:
   Armament: 1,534 tons, 4.2 %
   Armour: 13,590 tons, 37.5 %
      - Belts: 5,849 tons, 16.2 %
      - Torpedo bulkhead: 1,175 tons, 3.2 %
      - Armament: 2,501 tons, 6.9 %
      - Armour Deck: 3,787 tons, 10.5 %
      - Conning Tower: 278 tons, 0.8 %
   Machinery: 4,105 tons, 11.3 %
   Hull, fittings & equipment: 12,871 tons, 35.6 %
   Fuel, ammunition & stores: 3,594 tons, 9.9 %
   Miscellaneous weights: 500 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     50,253 lbs / 22,794 Kg = 38.4 x 13.8 " / 350 mm shells or 8.0 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 6.2 ft / 1.9 m
   Roll period: 17.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.570
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 26.74 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 12.35 degrees
   Stern overhang: -4.10 ft / -1.25 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.02 ft / 9.15 m
      - Forecastle (20 %):   24.61 ft / 7.50 m
      - Mid (71 %):      24.61 ft / 7.50 m (16.40 ft / 5.00 m aft of break)
      - Quarterdeck (10 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   22.66 ft / 6.91 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.6 %
      - Above water (accommodation/working, high = better): 169.1 %
   Waterplane Area: 52,001 Square feet or 4,831 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 177 lbs/sq ft or 863 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.34
      - 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

250t 1908 Fire Control
25t Long Range Markoni Installation
25t 1905 Sehendes Auge
25t 1912 Starshells for the 88mm guns + Large Seachlights
100t Berthing and supplies for 50 Strumtruppen
25t Contruction Reserve

[Sachmle]

She grew a little more as mission creep crawled up on me. However...very capable of lasting a long time as the eyes of the fleet (At least until CVs take over in ~20yrs). As to the float plane, I'll have 1914 historical AC by the time this is laid down, and in the mean time I'll be working on "testing" IC to 'see' if it works.


Ersatz Roon, Brandenburg Schlachtkreuzer laid down 1918 (Engine 1916)

Displacement:
   33,000 t light; 34,372 t standard; 37,055 t normal; 39,202 t full load

Dimensions: Length overall / water x beam x draught
   720.38 ft / 715.22 ft x 101.71 ft x 31.00 ft (normal load)
   219.57 m / 218.00 m x 31.00 m  x 9.45 m

Armament:
      8 - 13.78" / 350 mm guns (4x2 guns), 1,322.77lbs / 600.00kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      14 - 5.91" / 150 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1908 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     14 guns in hull casemates - Limited use in heavy seas
      4 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, all aft
      6 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1905 Model
     Quick firing guns in casemate mounts
     on side, all forward
      4 - 1.97" / 50.0 mm guns (2x2 guns), 3.86lbs / 1.75kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on centreline ends, evenly spread, all raised mounts
   Weight of broadside 12,286 lbs / 5,573 kg
   Shells per gun, main battery: 90
   4 - 19.7" / 500 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   465.06 ft / 141.75 m   16.01 ft / 4.88 m
   Ends:   3.94" / 100 mm   232.94 ft / 71.00 m   10.01 ft / 3.05 m
     17.22 ft / 5.25 m Unarmoured ends
   Upper:   5.91" / 150 mm   328.08 ft / 100.00 m   16.01 ft / 4.88 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      2.36" / 60 mm   465.06 ft / 141.75 m   39.01 ft / 11.89 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   5.51" / 140 mm      11.0" / 280 mm
   2nd:   5.91" / 150 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   3.94" / 100 mm   1.97" / 50 mm      2.95" / 75 mm

   - Armour deck: 3.94" / 100 mm, Conning tower: 12.60" / 320 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 112,000 shp / 83,552 Kw = 28.02 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 4,830 tons

Complement:
   1,334 - 1,735

Cost:
   £6.044 million / $24.177 million

Distribution of weights at normal displacement:
   Armament: 1,527 tons, 4.1 %
   Armour: 13,787 tons, 37.2 %
      - Belts: 5,596 tons, 15.1 %
      - Torpedo bulkhead: 1,586 tons, 4.3 %
      - Armament: 2,518 tons, 6.8 %
      - Armour Deck: 3,786 tons, 10.2 %
      - Conning Tower: 302 tons, 0.8 %
   Machinery: 4,173 tons, 11.3 %
   Hull, fittings & equipment: 13,014 tons, 35.1 %
   Fuel, ammunition & stores: 4,055 tons, 10.9 %
   Miscellaneous weights: 500 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     52,706 lbs / 23,907 Kg = 40.3 x 13.8 " / 350 mm shells or 8.7 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 6.2 ft / 1.9 m
   Roll period: 17.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.575
   Length to Beam Ratio: 7.03 : 1
   'Natural speed' for length: 26.74 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 9.75 degrees
   Stern overhang: -2.99 ft / -0.91 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      29.99 ft / 9.14 m
      - Forecastle (19 %):   24.02 ft / 7.32 m
      - Mid (78 %):      24.02 ft / 7.32 m (16.01 ft / 4.88 m aft of break)
      - Quarterdeck (15 %):   16.01 ft / 4.88 m
      - Stern:      16.01 ft / 4.88 m
      - Average freeboard:   22.69 ft / 6.92 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.3 %
      - Above water (accommodation/working, high = better): 171.6 %
   Waterplane Area: 51,974 Square feet or 4,829 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 178 lbs/sq ft or 868 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.36
      - 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

250t 1908 Fire Control
25t Long Range Markoni Installation
25t 1905 Sehendes Auge
25t 1912 Starshells for the 88mm guns + Large Seachlights
50t Berthing and supplies for 25 Strumtruppen
50t 1910: Historic 1914 Float Plane w/ crane
25t Contruction Reserve

[eltf177]

Don't you need to include torpedoes in miscellaneous weight?

[Sachmle]

Don't you need to include torpedoes in miscellaneous weight?

Typo. If you add up the Misc weight listed it comes out to 450t. So, 20t for 20 1t 1908 50cm torpedoes. Plus another 30t for the reserve.

[eltf177]

Don't you need to include torpedoes in miscellaneous weight?

Typo. If you add up the Misc weight listed it comes out to 450t. So, 20t for 20 1t 1908 50cm torpedoes. Plus another 30t for the reserve.

I should have suspected that when the total was under 500 tons.