Imperial yacht

[Borys]

Maybe I should finally build a replacement ...

Andreas Hoffer II, Habsburgs Imperial Yacht laid down 1912

Displacement:
   3 374 t light; 3 488 t standard; 4 747 t normal; 5 754 t full load

Dimensions: Length overall / water x beam x draught
   397,40 ft / 381,00 ft x 46,00 ft x 20,30 ft (normal load)
   121,13 m / 116,13 m x 14,02 m  x 6,19 m

Armament:
      4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side ends, evenly spread
      4 - 1,46" / 37,0 mm guns in single mounts, 1,55lbs / 0,70kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      6 - 0,43" / 11,0 mm guns in single mounts, 0,04lbs / 0,02kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread, 4 raised mounts
   Weight of broadside 134 lbs / 61 kg
   Shells per gun, main battery: 250

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1,00" / 25 mm   381,00 ft / 116,13 m   8,00 ft / 2,44 m
   Ends:   Unarmoured
   Upper:   1,00" / 25 mm     70,00 ft / 21,34 m   8,00 ft / 2,44 m
     Main Belt covers 154% of normal length

   - Armour deck: 0,50" / 13 mm, Conning tower: 4,00" / 102 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 32 684 shp / 24 382 Kw = 27,00 kts
   Range 5 500nm at 18,00 kts
   Bunker at max displacement = 2 266 tons (50% coal)

Complement:
   285 - 371

Cost:
   £0,323 million / $1,293 million

Distribution of weights at normal displacement:
   Armament: 17 tons, 0,4%
   Armour: 276 tons, 5,8%
      - Belts: 146 tons, 3,1%
      - Torpedo bulkhead: 0 tons, 0,0%
      - Armament: 0 tons, 0,0%
      - Armour Deck: 105 tons, 2,2%
      - Conning Tower: 24 tons, 0,5%
   Machinery: 1 365 tons, 28,8%
   Hull, fittings & equipment: 1 416 tons, 29,8%
   Fuel, ammunition & stores: 1 373 tons, 28,9%
   Miscellaneous weights: 300 tons, 6,3%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 410 lbs / 2 454 Kg = 169,1 x 4,0 " / 102 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,36
   Metacentric height 2,7 ft / 0,8 m
   Roll period: 11,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0,03
   Seaboat quality  (Average = 1.00): 1,34

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,467
   Length to Beam Ratio: 8,28 : 1
   'Natural speed' for length: 19,52 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   Bow angle (Positive = bow angles forward): -1,00 degrees
   Stern overhang: 16,40 ft / 5,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24,00 ft / 7,32 m
      - Forecastle (35%):   16,00 ft / 4,88 m
      - Mid (50%):      16,00 ft / 4,88 m
      - Quarterdeck (15%):   16,00 ft / 4,88 m
      - Stern:      16,00 ft / 4,88 m
      - Average freeboard:   17,12 ft / 5,22 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103,5%
      - Above water (accommodation/working, high = better): 121,3%
   Waterplane Area: 11 340 Square feet or 1 054 Square metres
   Displacement factor (Displacement / loading): 138%
   Structure weight / hull surface area: 67 lbs/sq ft or 328 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,91
      - Longitudinal: 2,71
      - Overall: 1,01
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

[The Rock Doctor]

I have in mind to do something as well:  having to borrow the family yacht for state business is "unbecoming" of a president.  Hence the other thread...

[Borys]

Finalised design. In wartime will be used as fast scout, raider, minelayer (hence the high miscelenous weight).


Andreas Hoffer II, Habsburgs Imperial Yacht laid down 1912

Displacement:
   3 448 t light; 3 563 t standard; 4 839 t normal; 5 859 t full load

Dimensions: Length overall / water x beam x draught
   397,40 ft / 381,00 ft x 46,00 ft x 20,30 ft (normal load)
   121,13 m / 116,13 m x 14,02 m  x 6,19 m

Armament:
      4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side ends, evenly spread
      2 - 1,25" / 31,8 mm guns in single mounts, 1,00lbs / 0,45kg shells, 1912 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0,43" / 11,0 mm guns in single mounts, 0,04lbs / 0,02kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 130 lbs / 59 kg
   Shells per gun, main battery: 250

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1,00" / 25 mm   381,00 ft / 116,13 m   8,00 ft / 2,44 m
   Ends:   Unarmoured
   Upper:   1,00" / 25 mm     70,00 ft / 21,34 m   12,00 ft / 3,66 m
     Main Belt covers 154% of normal length

   - Armour deck: 0,50" / 13 mm, Conning tower: 4,00" / 102 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 33 223 shp / 24 784 Kw = 27,00 kts
   Range 5 500nm at 18,00 kts
   Bunker at max displacement = 2 296 tons (50% coal)

Complement:
   289 - 377

Cost:
   £0,329 million / $1,315 million

Distribution of weights at normal displacement:
   Armament: 16 tons, 0,3%
   Armour: 294 tons, 6,1%
      - Belts: 163 tons, 3,4%
      - Torpedo bulkhead: 0 tons, 0,0%
      - Armament: 0 tons, 0,0%
      - Armour Deck: 106 tons, 2,2%
      - Conning Tower: 25 tons, 0,5%
   Machinery: 1 388 tons, 28,7%
   Hull, fittings & equipment: 1 400 tons, 28,9%
   Fuel, ammunition & stores: 1 391 tons, 28,7%
   Miscellaneous weights: 350 tons, 7,2%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 340 lbs / 2 422 Kg = 166,9 x 4,0 " / 102 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,33
   Metacentric height 2,6 ft / 0,8 m
   Roll period: 12,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0,03
   Seaboat quality  (Average = 1.00): 1,31

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,476
   Length to Beam Ratio: 8,28 : 1
   'Natural speed' for length: 19,52 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): -1,00 degrees
   Stern overhang: 16,40 ft / 5,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24,00 ft / 7,32 m
      - Forecastle (35%):   16,00 ft / 4,88 m
      - Mid (50%):      16,00 ft / 4,88 m
      - Quarterdeck (15%):   16,00 ft / 4,88 m
      - Stern:      16,00 ft / 4,88 m
      - Average freeboard:   17,12 ft / 5,22 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104,1%
      - Above water (accommodation/working, high = better): 120,5%
   Waterplane Area: 11 429 Square feet or 1 062 Square metres
   Displacement factor (Displacement / loading): 136%
   Structure weight / hull surface area: 66 lbs/sq ft or 323 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,89
      - Longitudinal: 2,63
      - 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

[The Rock Doctor]

Looks good. 

[Borys]

Ahoj!
I improved :
- the armour scheme - the belt rises 6' above the WL, on top of that the armoured Imperial Bedroom, 10 high;
- seakeeping - rised forecastle, with the two foremost 4" guns;


Andreas Hoffer II, Habsburgs Imperial Yacht laid down 1912

Displacement:
   3 642 t light; 3 762 t standard; 5 083 t normal; 6 139 t full load

Dimensions: Length overall / water x beam x draught
   397,40 ft / 381,00 ft x 46,00 ft x 20,30 ft (normal load)
   121,13 m / 116,13 m x 14,02 m  x 6,19 m

Armament:
      4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side ends, evenly spread, 2 raised mounts - superfiring
      2 - 1,25" / 31,8 mm guns in single mounts, 1,00lbs / 0,45kg shells, 1912 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0,43" / 11,0 mm guns in single mounts, 0,04lbs / 0,02kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 130 lbs / 59 kg
   Shells per gun, main battery: 250

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1,00" / 25 mm   381,00 ft / 116,13 m   12,00 ft / 3,66 m
   Ends:   Unarmoured
   Upper:   1,00" / 25 mm     70,00 ft / 21,34 m   10,00 ft / 3,05 m
     Main Belt covers 154% of normal length

   - Armour deck: 0,50" / 13 mm, Conning tower: 4,00" / 102 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 34 667 shp / 25 862 Kw = 27,00 kts
   Range 5 500nm at 18,00 kts
   Bunker at max displacement = 2 377 tons (50% coal)

Complement:
   300 - 391

Cost:
   £0,344 million / $1,375 million

Distribution of weights at normal displacement:
   Armament: 16 tons, 0,3%
   Armour: 345 tons, 6,8%
      - Belts: 211 tons, 4,2%
      - Torpedo bulkhead: 0 tons, 0,0%
      - Armament: 0 tons, 0,0%
      - Armour Deck: 108 tons, 2,1%
      - Conning Tower: 25 tons, 0,5%
   Machinery: 1 448 tons, 28,5%
   Hull, fittings & equipment: 1 483 tons, 29,2%
   Fuel, ammunition & stores: 1 440 tons, 28,3%
   Miscellaneous weights: 350 tons, 6,9%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 567 lbs / 2 525 Kg = 174,0 x 4,0 " / 102 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,29
   Metacentric height 2,5 ft / 0,7 m
   Roll period: 12,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,04
   Seaboat quality  (Average = 1.00): 1,50

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0,500
   Length to Beam Ratio: 8,28 : 1
   'Natural speed' for length: 19,52 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): -1,00 degrees
   Stern overhang: 16,40 ft / 5,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26,00 ft / 7,92 m
      - Forecastle (35%):   23,00 ft / 7,01 m (16,00 ft / 4,88 m aft of break)
      - Mid (50%):      16,00 ft / 4,88 m
      - Quarterdeck (15%):   16,00 ft / 4,88 m
      - Stern:      16,00 ft / 4,88 m
      - Average freeboard:   18,87 ft / 5,75 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102,9%
      - Above water (accommodation/working, high = better): 118,6%
   Waterplane Area: 11 677 Square feet or 1 085 Square metres
   Displacement factor (Displacement / loading): 137%
   Structure weight / hull surface area: 65 lbs/sq ft or 316 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,88
      - Longitudinal: 3,23
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Korpen]

Ahoj!
I improved :
- the armour scheme - the belt rises 6' above the WL, on top of that the armoured Imperial Bedroom, 10 high;
- seakeeping - rised forecastle, with the two foremost 4" guns;


Andreas Hoffer II, Habsburgs Imperial Yacht laid down 1912

Considered to go full oil firing, to lessen the risk of getting coal soot on the white dresses and uniforms?

All in all a nice vessel.

[Borys]

Ahoj!
There is a laundry on-board, and suitably trained personel.
http://images.buycostumes.com/mgen/merchandiser/17249.jpg

Andreas Hopfer III will be oil fired.

Borys

[The Rock Doctor]

Sounds like you're already assuming she'll get sunk.

[Borys]

Ahoj!
Sorry for being too cryptic. What I meant is that the KKK is slowly adopting oil firing, in fits and starts, and that a 50-50 split reflects this. When the SMS Andreas Hopfer (II) gets replaced, hopefully c.1930, the successor ship will be 100% oil fired.
Borys