Peru 1915-1919 program

[Jefgte]

Probably

------T1-T2--T3-B-F--F---B-T4--T5-----

T2 superfiring


;)

[Jefgte]

T2 & T4 superfiring to have greater place for 120mm

------T1-T2--T3-B-F--F---B-T4-T5-----


Waskhar, Peru BB-28000T-5T3x340 laid down 1915 (Engine 1912)

Displacement:
   28 000 t light; 29 703 t standard; 31 410 t normal; 32 776 t full load

Dimensions: Length overall / water x beam x draught
   616.80 ft / 616.80 ft x 101.71 ft x 28.45 ft (normal load)
   188.00 m / 188.00 m x 31.00 m  x 8.67 m

Armament:
      15 - 13.39" / 340 mm guns (5x3 guns), 1 200.00lbs / 544.31kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1915 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1915 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, all raised mounts
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg 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 19 109 lbs / 8 668 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   400.26 ft / 122.00 m   12.73 ft / 3.88 m
   Ends:   4.72" / 120 mm   196.85 ft / 60.00 m   10.17 ft / 3.10 m
     19.69 ft / 6.00 m Unarmoured ends
   Upper:   4.72" / 120 mm   400.26 ft / 122.00 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.77" / 45 mm   400.26 ft / 122.00 m   28.28 ft / 8.62 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   6.30" / 160 mm      11.8" / 300 mm
   2nd:   13.4" / 340 mm   6.30" / 160 mm      11.8" / 300 mm
   3rd:   1.57" / 40 mm         -               -
   4th:   0.79" / 20 mm         -               -
   5th:   0.50" / 13 mm         -               -

   - Armour deck: 3.15" / 80 mm, Conning tower: 13.39" / 340 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 38 000 shp / 28 348 Kw = 21.30 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 3 073 tons

Complement:
   1 179 - 1 533

Cost:
   £4.651 million / $18.603 million

Distribution of weights at normal displacement:
   Armament: 2 387 tons, 7.6 %
   Armour: 11 457 tons, 36.5 %
      - Belts: 4 026 tons, 12.8 %
      - Torpedo bulkhead: 742 tons, 2.4 %
      - Armament: 3 688 tons, 11.7 %
      - Armour Deck: 2 714 tons, 8.6 %
      - Conning Tower: 287 tons, 0.9 %
   Machinery: 1 515 tons, 4.8 %
   Hull, fittings & equipment: 12 191 tons, 38.8 %
   Fuel, ammunition & stores: 3 411 tons, 10.9 %
   Miscellaneous weights: 450 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     36 492 lbs / 16 553 Kg = 30.4 x 13.4 " / 340 mm shells or 6.2 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 5.4 ft / 1.6 m
   Roll period: 18.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.73
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.616
   Length to Beam Ratio: 6.06 : 1
   'Natural speed' for length: 24.84 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   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:      23.62 ft / 7.20 m
      - Forecastle (19 %):   19.69 ft / 6.00 m
      - Mid (40 %):      16.40 ft / 5.00 m
      - Quarterdeck (18 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.67 ft / 5.39 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.7 %
      - Above water (accommodation/working, high = better): 127.5 %
   Waterplane Area: 46 571 Square feet or 4 327 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 200 lbs/sq ft or 974 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.29
      - 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

[Korpen]

Very conventional I see.
Interesting, but not surprising that Peru seems to take a large amount of inspiration from GC design practices.

Main:   13.4" / 340 mm   400.26 ft / 122.00 m   12.73 ft / 3.88 m
   Ends:   4.72" / 120 mm   196.85 ft / 60.00 m   10.17 ft / 3.10 m
     19.69 ft / 6.00 m Unarmoured ends
   Upper:   4.72" / 120 mm   400.26 ft / 122.00 m   8.01 ft / 2.44 m

Unless my math is off, this arrangement means that there will be a significant gap (60cm) between the casemates at deck level, and the upper belt.

Main:   13.4" / 340 mm   6.30" / 160 mm      11.8" / 300 mm
   2nd:   13.4" / 340 mm   6.30" / 160 mm      11.8" / 300 mm

You got 34cm thick armour on the 12cm casemates?  :o

[Jefgte]

Interesting, but not surprising that Peru seems to take a large amount of inspiration from GC design practices.

Not exact, I design the first 15x340 in sept.
I need GC technos but not designs.

http://www.navalism.org/index.php?topic=2193.0

...   ???  This design made in sept is better that the last one ...  ???

[Jefgte]

Without mistake, I hope, here is the final design of the Peruvian BB Waskhar
The disposition of the turrets is similar to the BB Atahualpa. just a superfiring turrets is add aft.


Waskhar-28000t, Peru BB laid down 1915 (Engine 1912)

Displacement:
   28 000 t light; 29 734 t standard; 31 443 t normal; 32 810 t full load

Dimensions: Length overall / water x beam x draught
   623.36 ft / 623.36 ft x 100.56 ft x 28.50 ft (normal load)
   190.00 m / 190.00 m x 30.65 m  x 8.69 m

Armament:
      9 - 13.39" / 340 mm guns (3x3 guns), 1 200.00lbs / 544.31kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 1 raised mount aft - superfiring
      6 - 13.39" / 340 mm guns (2x3 guns), 1 200.00lbs / 544.31kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, all amidships
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1915 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1915 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, all raised mounts
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 19 108 lbs / 8 667 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   406.82 ft / 124.00 m   12.73 ft / 3.88 m
   Ends:   4.72" / 120 mm   196.85 ft / 60.00 m   10.17 ft / 3.10 m
     19.69 ft / 6.00 m Unarmoured ends
   Upper:   3.15" / 80 mm   406.82 ft / 124.00 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.77" / 45 mm   406.82 ft / 124.00 m   28.31 ft / 8.63 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   5.91" / 150 mm      11.8" / 300 mm
   2nd:   13.4" / 340 mm   5.91" / 150 mm      11.8" / 300 mm
   3rd:   1.57" / 40 mm         -               -
   4th:   1.57" / 40 mm         -               -
   5th:   0.50" / 13 mm         -               -

   - Armour deck: 3.15" / 80 mm, Conning tower: 13.39" / 340 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 37 000 shp / 27 602 Kw = 21.17 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 3 076 tons

Complement:
   1 179 - 1 534

Cost:
   £4.643 million / $18.570 million

Distribution of weights at normal displacement:
   Armament: 2 387 tons, 7.6 %
   Armour: 10 639 tons, 33.8 %
      - Belts: 3 846 tons, 12.2 %
      - Torpedo bulkhead: 755 tons, 2.4 %
      - Armament: 3 039 tons, 9.7 %
      - Armour Deck: 2 711 tons, 8.6 %
      - Conning Tower: 287 tons, 0.9 %
   Machinery: 1 475 tons, 4.7 %
   Hull, fittings & equipment: 13 098 tons, 41.7 %
   Fuel, ammunition & stores: 3 443 tons, 10.9 %
   Miscellaneous weights: 400 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     39 748 lbs / 18 030 Kg = 33.1 x 13.4 " / 340 mm shells or 6.5 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 17.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.82
   Seaboat quality  (Average = 1.00): 1.33

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.616
   Length to Beam Ratio: 6.20 : 1
   'Natural speed' for length: 24.97 kts
   Power going to wave formation at top speed: 43 %
   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:      26.90 ft / 8.20 m
      - Forecastle (18 %):   21.33 ft / 6.50 m
      - Mid (70 %):      20.67 ft / 6.30 m (12.47 ft / 3.80 m aft of break)
      - Quarterdeck (17 %):   12.47 ft / 3.80 m
      - Stern:      12.47 ft / 3.80 m
      - Average freeboard:   18.90 ft / 5.76 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.2 %
      - Above water (accommodation/working, high = better): 145.0 %
   Waterplane Area: 46 535 Square feet or 4 323 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 211 lbs/sq ft or 1 031 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.49
      - 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

[Jefgte]

Waskhar drawing

[Guinness]

What do you imagine the machinery arrangement is? Are the turbines all amidships maybe? Or do you just have two really long shafts to the space between A and P turret?

[Jefgte]

Arrangement idem to Atahualpa BB

Turbines are under the crane

---------magazines / boilers / magazines / turbines / magazines / boilers / magazines-------



;)

[Tanthalas]

Arrangement idem to Atahualpa BB

Turbines are under the crane

---------magazines / boilers / magazines / turbines / magazines / boilers / magazines-------



;)

Yup midships bout like I figured they would be.

[Borys]

I love heated magazines ... all that steam running past the second and third barbette ... a KABOOM waiting to happen ...
Borys

[Tanthalas]

I love heated magazines ... all that steam running past the second and third barbette ... a KABOOM waiting to happen ...
Borys

Looks at the Hapsburg turret farm... Yup same problem ;)

[Jefgte]

Like all warships built for Peru, Waskhar use "fresh water bulkhead" to refresh magasines.
That's necessary for tropical climat.
Here a view of BB Atahualpa



& the original topic - look at the 20 june post

http://www.navalism.org/index.php?topic=2193.15


;)

[Guinness]

Neat. Jef: what CAD program do you use for your designs? I'm not sure I'm ready to take a dive into 3D rendering yet, but doing inner layouts like this in CAD might be really useful for my big ships and actually save me some time later...

[Jefgte]

I use an obsolete electronic CAD - 1999 -
I use only the library part, I draw with segments.
scale: 1mm for 1m
grid 0.1mm

;)

[maddox]

Can I commission a few drawings?