Protected Cruisers for Peru

Started by Jefgte, April 10, 2008, 06:50:23 PM

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Jefgte

April 10, 2008, 06:50:23 PM
These Cruisers are made to help BB in the battle line - repulse enemy cruisers & Torpedo Boats.

---------------------------------

4600T escort cruiser for BB, Peru Protected Cruiser laid down 1906 (Engine 1907)

Maitac Capac - 1906
Capac Yupanquy - 1908

Displacement:
   4 600 t light; 4 835 t standard; 5 202 t normal; 5 495 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 55.77 ft x 13.70 ft (normal load)
   150.00 m / 150.00 m x 17.00 m  x 4.18 m

Armament:
      4 - 9.00" / 229 mm guns (2x2 guns), 364.50lbs / 165.33kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1906 Model
     Breech loading guns in casemate mounts
     on centreline, all amidships
      4 - 0.50" / 12.7 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1906 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1 880 lbs / 853 kg
   Shells per gun, main battery: 120
   4 - 18.0" / 457 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   291.99 ft / 89.00 m   9.19 ft / 2.80 m
   Ends:   1.57" / 40 mm   157.48 ft / 48.00 m   8.01 ft / 2.44 m
     42.65 ft / 13.00 m Unarmoured ends
     Main Belt covers 91 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   1.57" / 40 mm      3.15" / 80 mm
   2nd:   1.18" / 30 mm         -               -
   3rd:   0.79" / 20 mm         -               -

   - Armour deck: 1.38" / 35 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 14 405 shp / 10 746 Kw = 22.06 kts
   Range 5 000nm at 10.00 kts
   Bunker at max displacement = 660 tons

Complement:
   306 - 398

Cost:
   £0.473 million / $1.892 million

Distribution of weights at normal displacement:
   Armament: 235 tons, 4.5 %
   Armour: 1 170 tons, 22.5 %
      - Belts: 525 tons, 10.1 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 161 tons, 3.1 %
      - Armour Deck: 460 tons, 8.8 %
      - Conning Tower: 25 tons, 0.5 %
   Machinery: 818 tons, 15.7 %
   Hull, fittings & equipment: 2 351 tons, 45.2 %
   Fuel, ammunition & stores: 602 tons, 11.6 %
   Miscellaneous weights: 25 tons, 0.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 219 lbs / 3 274 Kg = 19.8 x 9.0 " / 229 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 3.2 ft / 1.0 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.484
   Length to Beam Ratio: 8.82 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.70 ft / 5.70 m
      - Forecastle (18 %):   14.11 ft / 4.30 m
      - Mid (30 %):      12.47 ft / 3.80 m
      - Quarterdeck (18 %):   12.47 ft / 3.80 m
      - Stern:      12.47 ft / 3.80 m
      - Average freeboard:   13.18 ft / 4.02 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.1 %
      - Above water (accommodation/working, high = better): 141.7 %
   Waterplane Area: 18 026 Square feet or 1 675 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 94 lbs/sq ft or 461 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 0.99
      - 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

--------------------------


4750T escort cruiser for BB, Peru Protected Cruiser laid down 1911 (Engine 1912)

Inca Roca -1911
Yahuar Huacac - 1914

Displacement:
   4 750 t light; 5 017 t standard; 5 313 t normal; 5 549 t full load

Dimensions: Length overall / water x beam x draught
   511.81 ft / 511.81 ft x 54.46 ft x 13.78 ft (normal load)
   156.00 m / 156.00 m x 16.60 m  x 4.20 m

Armament:
      4 - 9.00" / 229 mm guns (2x2 guns), 364.50lbs / 165.33kg shells, 1911 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 5.91" / 150 mm guns in single mounts, 102.98lbs / 46.71kg shells, 1911 Model
     Breech loading guns in casemate mounts
     on centreline, all amidships
      4 - 0.50" / 12.7 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1911 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2 282 lbs / 1 035 kg
   Shells per gun, main battery: 120
   4 - 18.0" / 457 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   291.99 ft / 89.00 m   9.19 ft / 2.80 m
   Ends:   1.57" / 40 mm   157.48 ft / 48.00 m   8.01 ft / 2.44 m
     62.34 ft / 19.00 m Unarmoured ends
     Main Belt covers 88 % 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   1.57" / 40 mm      3.15" / 80 mm
   2nd:   1.18" / 30 mm         -               -
   3rd:   0.79" / 20 mm         -               -

   - Armour deck: 1.38" / 35 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 19 098 shp / 14 247 Kw = 23.81 kts
   Range 5 000nm at 10.00 kts
   Bunker at max displacement = 532 tons

Complement:
   310 - 404

Cost:
   £0.512 million / $2.050 million

Distribution of weights at normal displacement:
   Armament: 285 tons, 5.4 %
   Armour: 1 188 tons, 22.4 %
      - Belts: 525 tons, 9.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 171 tons, 3.2 %
      - Armour Deck: 467 tons, 8.8 %
      - Conning Tower: 26 tons, 0.5 %
   Machinery: 761 tons, 14.3 %
   Hull, fittings & equipment: 2 490 tons, 46.9 %
   Fuel, ammunition & stores: 563 tons, 10.6 %
   Miscellaneous weights: 25 tons, 0.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 260 lbs / 3 293 Kg = 19.9 x 9.0 " / 229 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.484
   Length to Beam Ratio: 9.40 : 1
   'Natural speed' for length: 22.62 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19.69 ft / 6.00 m
      - Forecastle (18 %):   14.11 ft / 4.30 m
      - Mid (30 %):      13.12 ft / 4.00 m
      - Quarterdeck (18 %):   13.12 ft / 4.00 m
      - Stern:      13.12 ft / 4.00 m
      - Average freeboard:   13.76 ft / 4.19 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.0 %
      - Above water (accommodation/working, high = better): 148.7 %
   Waterplane Area: 18 306 Square feet or 1 701 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 96 lbs/sq ft or 471 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.00
      - 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

"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

Sachmle

#1
April 11, 2008, 07:48:13 AM
Oy! You may need to check over the naval technology rules
http://www.navalism.org/index.php?topic=81.0
to see if your ships fit in the rules.  I think they are good, but I don't think PCs can have turret (on barbette) until you've got the tech.
"All treaties between great states cease to be binding when they come in conflict with the struggle for existence."
Otto von Bismarck

"Give me a woman who loves beer and I will conquer the world."
Kaiser Wilhelm

"If stupidity were painfull I would be deaf from all the screaming." Sam A. Grim

Korpen

#2
April 11, 2008, 08:33:42 AM
Quote from: Sachmle on April 11, 2008, 07:48:13 AM
Oy! You may need to check over the naval technology rules
http://www.navalism.org/index.php?topic=81.0
to see if your ships fit in the rules.  I think they are good, but I don't think PCs can have turret (on barbette) until you've got the tech.
The ships are fins with the rules. As the guns are over 17cm (or were the cutoff is) they fall under battleship technology rather then light cruiser tech.
Card-carrying member of the Battlecruiser Fan Club.

Ithekro

#3
April 11, 2008, 10:13:11 AM
They seem a little light and thin to do their job.  (a block co. of 0.484?), and very thin armor.  Against other protected cruisers they might do fine given there caliber of their guns, plus range advantage, but against any armored cruiser, she is pretty underprotected.  She also may not have enough firepower verse torpedo boats and destroyers (in terms of lighter weapons and quick fires).  However she is relatively cheap, so in a larger navy, I could see these in squadrons to cover small divisions of battleships.

Jefgte

#4
April 11, 2008, 03:50:36 PM
Itherkro wrote:
"...I could see these in squadrons to cover small divisions of battleships..."

That's exactly their job

Because the smal capacity of building for Peru, I made "classic" protected cruiser with armored cruiser turrets for main armament (2T2x9").

A kind of "Pocket Armored Cruiser" ... :D :D :D


Jef  ;)
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

Ithekro

#5
April 11, 2008, 05:53:48 PM
By squadron I mean eight ships and by division of Battleships I mean two ship   (in this case).

Jefgte

#6
June 15, 2008, 05:05:12 PM
With the triple turrets techno & in a 120m drydock,
this Protected Cruiser is certainly interresting in a small BS to protect 20kts BB.

4800T escort cruiser for BB, Peru Protected Cruiser laid down 1915

Displacement:
   4 800 t light; 5 093 t standard; 5 608 t normal; 6 020 t full load

Dimensions: Length overall / water x beam x draught
   390.42 ft / 390.42 ft x 55.77 ft x 15.95 ft (normal load)
   119.00 m / 119.00 m x 17.00 m  x 4.86 m

Armament:
      6 - 9.00" / 229 mm guns (2x3 guns), 364.50lbs / 165.33kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1915 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      4 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1915 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2 625 lbs / 1 191 kg
   Shells per gun, main battery: 120
   4 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   236.22 ft / 72.00 m   9.19 ft / 2.80 m
   Ends:   1.57" / 40 mm   150.92 ft / 46.00 m   8.01 ft / 2.44 m
     3.28 ft / 1.00 m Unarmoured ends
     Main Belt covers 93 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.72" / 120 mm   1.57" / 40 mm      3.94" / 100 mm
   2nd:   1.18" / 30 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 1.18" / 30 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 20 000 shp / 14 920 Kw = 22.98 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 927 tons

Complement:
   323 - 421

Cost:
   £0.800 million / $3.198 million

Distribution of weights at normal displacement:
   Armament: 328 tons, 5.9 %
   Armour: 1 146 tons, 20.4 %
      - Belts: 521 tons, 9.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 256 tons, 4.6 %
      - Armour Deck: 337 tons, 6.0 %
      - Conning Tower: 32 tons, 0.6 %
   Machinery: 758 tons, 13.5 %
   Hull, fittings & equipment: 2 438 tons, 43.5 %
   Fuel, ammunition & stores: 809 tons, 14.4 %
   Miscellaneous weights: 130 tons, 2.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 255 lbs / 3 291 Kg = 19.9 x 9.0 " / 229 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 14.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.84
   Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.565
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 19.76 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.28 ft / 7.40 m
      - Forecastle (18 %):   19.03 ft / 5.80 m
      - Mid (50 %):      15.09 ft / 4.60 m
      - Quarterdeck (18 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   16.59 ft / 5.06 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.0 %
      - Above water (accommodation/working, high = better): 126.3 %
   Waterplane Area: 15 412 Square feet or 1 432 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 107 lbs/sq ft or 520 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.14
      - 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
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

The Rock Doctor

#7
June 16, 2008, 06:30:53 AM
The beam seems somewhat narrow for a triple 9" turret to fit in.

Although I'm not sure I'd bother with torpedoes if the role is battleline escort, the design is otherwise not too bad.

Borys

#8
June 16, 2008, 01:47:04 PM
Ahoj!
Torpedos can always come in handy - coup the grace, disrupting an enemy attack - a girl never knows when she'll need one.
Although she looks a tad overgunned to me.
Borys
NEDS - Not Enough Deck Space for all those guns and torpedos;
Bambi must DIE!

Jefgte

#9
June 16, 2008, 04:49:08 PM
Beam narrow...

Same proportions as Panzerschiff class
- 20.7m for T3x280
- 17m for T3x230
So, I can increase lightly the beam  :D

Torpedo tubes are going to be "submerged"-

-------------------------------------------------

This ship is not realy a cruiser but a kind of light Battleship (Ushakov).
Her job in the BS is :
Protect the BB from Cruiser & Destroyers
Engage enemy cruisers & repulse enemy attack destroyers .


Jef  ;)


"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

Jefgte

#10
July 07, 2008, 07:38:01 AM

To complet "Atahualpa Squadron", here is a Protected Cruiser project

LD 1914 - 6000T

6000T cruiser, Peru Squadron Protected Cruiser laid down 1914

Displacement:
   6 000 t light; 6 321 t standard; 6 939 t normal; 7 433 t full load

Dimensions: Length overall / water x beam x draught
   482.28 ft / 482.28 ft x 68.90 ft x 15.39 ft (normal load)
   147.00 m / 147.00 m x 21.00 m  x 4.69 m

Armament:
      4 - 9.06" / 230 mm guns (2x2 guns), 371.24lbs / 168.39kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      2 - 9.06" / 230 mm guns (1x2 guns), 371.24lbs / 168.39kg shells, 1914 Model
     Breech loading guns in a turret (on a barbette)
     on centreline amidships
      10 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1914 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1914 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1914 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2 466 lbs / 1 119 kg
   Shells per gun, main battery: 125
   4 - 18.0" / 457 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   249.34 ft / 76.00 m   9.19 ft / 2.80 m
   Ends:   1.97" / 50 mm   216.54 ft / 66.00 m   8.01 ft / 2.44 m
     16.40 ft / 5.00 m Unarmoured ends
     Main Belt covers 80 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.51" / 140 mm   1.57" / 40 mm      3.94" / 100 mm
   2nd:   5.51" / 140 mm   1.57" / 40 mm      3.94" / 100 mm
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 1.18" / 30 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 20 800 shp / 15 517 Kw = 23.06 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 112 tons

Complement:
   379 - 494

Cost:
   £0.740 million / $2.958 million

Distribution of weights at normal displacement:
   Armament: 308 tons, 4.4 %
   Armour: 1 417 tons, 20.4 %
      - Belts: 616 tons, 8.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 291 tons, 4.2 %
      - Armour Deck: 473 tons, 6.8 %
      - Conning Tower: 37 tons, 0.5 %
   Machinery: 801 tons, 11.5 %
   Hull, fittings & equipment: 3 324 tons, 47.9 %
   Fuel, ammunition & stores: 939 tons, 13.5 %
   Miscellaneous weights: 150 tons, 2.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11 784 lbs / 5 345 Kg = 31.7 x 9.1 " / 230 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 4.4 ft / 1.4 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.33
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.475
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22.31 ft / 6.80 m
      - Forecastle (19 %):   17.72 ft / 5.40 m
      - Mid (40 %):      14.44 ft / 4.40 m
      - Quarterdeck (19 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   15.75 ft / 4.80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 77.7 %
      - Above water (accommodation/working, high = better): 163.1 %
   Waterplane Area: 21 650 Square feet or 2 011 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 114 lbs/sq ft or 557 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.44
      - 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



Jef  ;)
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

Jefgte

#11
July 07, 2008, 08:33:11 AM
Always to complet Atahualpa Squadron, I think the good project.
Same disposition for the turrets APQY as Atahualpa BB
Same lenght & silhouette

8000T cruiser, Peru Protected Cruiser laid down 1913

Displacement:
   8 000 t light; 8 481 t standard; 9 257 t normal; 9 877 t full load

Dimensions: Length overall / water x beam x draught
   551.18 ft / 551.18 ft x 59.06 ft x 17.62 ft (normal load)
   168.00 m / 168.00 m x 18.00 m  x 5.37 m

Armament:
      4 - 9.06" / 230 mm guns (2x2 guns), 371.24lbs / 168.39kg shells, 1913 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      4 - 9.06" / 230 mm guns (2x2 guns), 371.24lbs / 168.39kg shells, 1913 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, all amidships
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1913 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      12 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 3 886 lbs / 1 762 kg
   Shells per gun, main battery: 125
   4 - 18.0" / 457 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.51" / 140 mm   314.96 ft / 96.00 m   12.01 ft / 3.66 m
   Ends:   2.36" / 60 mm   213.25 ft / 65.00 m   8.01 ft / 2.44 m
     22.97 ft / 7.00 m Unarmoured ends
     Main Belt covers 88 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.51" / 140 mm   2.76" / 70 mm      3.94" / 100 mm
   2nd:   5.51" / 140 mm   2.76" / 70 mm      3.94" / 100 mm
   3rd:   0.79" / 20 mm         -               -
   4th:   0.79" / 20 mm         -               -
   5th:   0.50" / 13 mm         -               -

   - Armour deck: 1.77" / 45 mm, Conning tower: 5.51" / 140 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 30 000 shp / 22 380 Kw = 24.51 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 395 tons

Complement:
   471 - 613

Cost:
   £0.930 million / $3.720 million

Distribution of weights at normal displacement:
   Armament: 486 tons, 5.2 %
   Armour: 2 315 tons, 25.0 %
      - Belts: 1 044 tons, 11.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 463 tons, 5.0 %
      - Armour Deck: 755 tons, 8.2 %
      - Conning Tower: 52 tons, 0.6 %
   Machinery: 1 176 tons, 12.7 %
   Hull, fittings & equipment: 3 874 tons, 41.9 %
   Fuel, ammunition & stores: 1 257 tons, 13.6 %
   Miscellaneous weights: 150 tons, 1.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11 857 lbs / 5 378 Kg = 31.9 x 9.1 " / 230 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 14.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.83
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.565
   Length to Beam Ratio: 9.33 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.28 ft / 7.40 m
      - Forecastle (18 %):   18.37 ft / 5.60 m
      - Mid (30 %):      15.09 ft / 4.60 m
      - Quarterdeck (18 %):   15.09 ft / 4.60 m
      - Stern:      15.09 ft / 4.60 m
      - Average freeboard:   16.30 ft / 4.97 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 87.4 %
      - Above water (accommodation/working, high = better): 143.5 %
   Waterplane Area: 23 038 Square feet or 2 140 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 114 lbs/sq ft or 558 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.12
      - 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



Jef  ;)
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

The Rock Doctor

#12
July 07, 2008, 08:35:48 AM
That's not bad - but I don't think you need both 12 x 120 mm and 12 x 90 mm.  You could probably get by with just one of those, and use the weight savings of the other to nudge the miscellaneous weight (for eventual FC installation) up some.

Jefgte

#13
July 07, 2008, 09:07:04 AM
"...12 x 120 mm and 12 x 90 mm..."

These guns are made to engage DDs & eventualy light cruisers

What is better in 1913 to repulse DDs attack (protect the BB)
BL 120mm or QF 90mm ?


Jef  ;)
"You French are fighting for money, while we English are fighting for honor!"
"Everyone is fighting for what they miss. "
Surcouf

Korpen

#14
July 07, 2008, 09:08:30 AM
Quote from: Jefgte on July 07, 2008, 09:07:04 AM
"...12 x 120 mm and 12 x 90 mm..."

These guns are made to engage DDs & eventualy light cruisers

What is better in 1913 to repulse DDs attack (protect the BB)
BL 120mm or QF 90mm ?


Jef  ;)
12cm is always best! :)
Card-carrying member of the Battlecruiser Fan Club.
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