Armada Escort Cruisers

[Jefgte]

Viracocha Inca - LD 1901 - in service 1904 - refit 1912-to Greece 1914
Pachacutec - LD 1903 - In service 1906

4700T, Peru escort cruiser laid down 1901

Displacement:
   4 700 t light; 4 916 t standard; 5 352 t normal; 5 700 t full load

Dimensions: Length overall / water x beam x draught
   387.14 ft / 387.14 ft x 68.90 ft x 14.19 ft (normal load)
   118.00 m / 118.00 m x 21.00 m  x 4.32 m

Armament:
     4 - 9.06" / 230 mm guns (2x2 guns), 371.24lbs / 168.39kg shells, 1901 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     10 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1901 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1901 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1 708 lbs / 775 kg
   Shells per gun, main battery: 110
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   282.15 ft / 86.00 m   8.01 ft / 2.44 m
   Ends:   1.57" / 40 mm     78.74 ft / 24.00 m   8.01 ft / 2.44 m
     26.25 ft / 8.00 m Unarmoured ends
     Main Belt covers 112 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.72" / 120 mm   1.97" / 50 mm      3.94" / 100 mm
   2nd:   1.57" / 40 mm         -               -
   3rd:   0.79" / 20 mm         -               -

  - Armour deck: 1.18" / 30 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 7 844 ihp / 5 851 Kw = 18.15 kts
   Range 4 500nm at 10.00 kts
   Bunker at max displacement = 785 tons (100% coal)

Complement:
   312 - 406

Cost:
   £0.513 million / $2.051 million

Distribution of weights at normal displacement:
   Armament: 213 tons, 4.0 %
   Armour: 1 019 tons, 19.0 %
      - Belts: 416 tons, 7.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 191 tons, 3.6 %
      - Armour Deck: 387 tons, 7.2 %
      - Conning Tower: 26 tons, 0.5 %
   Machinery: 1 207 tons, 22.5 %
   Hull, fittings & equipment: 2 176 tons, 40.7 %
   Fuel, ammunition & stores: 651 tons, 12.2 %
   Miscellaneous weights: 85 tons, 1.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 537 lbs / 2 511 Kg = 14.9 x 9.1 " / 230 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.45
   Metacentric height 5.4 ft / 1.7 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 79 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.495
   Length to Beam Ratio: 5.62 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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:      15.75 ft / 4.80 m
      - Forecastle (16 %):   13.12 ft / 4.00 m
      - Mid (50 %):      11.48 ft / 3.50 m
      - Quarterdeck (16 %):   11.48 ft / 3.50 m
      - Stern:      11.48 ft / 3.50 m
      - Average freeboard:   12.19 ft / 3.72 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111.1 %
      - Above water (accommodation/working, high = better): 128.5 %
   Waterplane Area: 17 691 Square feet or 1 644 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 98 lbs/sq ft or 479 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - 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]

Inca Roca escort cruiser class is slightly improved from the Viracocha class (4700T)

Inca Roca - LD 1905 - in Service 1908
Yahuar Huacac - LD 1908 - In service 1911

4800T, Peru escort cruiser laid down 1905

4800T, Peru Protected cruiser laid down 1905

Displacement:
   4 800 t light; 5 017 t standard; 5 431 t normal; 5 762 t full load

Dimensions: Length overall / water x beam x draught
   387.14 ft / 387.14 ft x 68.90 ft x 14.40 ft (normal load)
   118.00 m / 118.00 m x 21.00 m  x 4.39 m

Armament:
     4 - 9.06" / 230 mm guns (2x2 guns), 371.24lbs / 168.39kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     10 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1 708 lbs / 775 kg
   Shells per gun, main battery: 110
   4 - 18.0" / 457 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   282.15 ft / 86.00 m   8.01 ft / 2.44 m
   Ends:   1.57" / 40 mm     78.74 ft / 24.00 m   8.01 ft / 2.44 m
     26.25 ft / 8.00 m Unarmoured ends
     Main Belt covers 112 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.72" / 120 mm   1.97" / 50 mm      3.94" / 100 mm
   2nd:   1.57" / 40 mm         -               -
   3rd:   0.79" / 20 mm         -               -

  - Armour deck: 1.18" / 30 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 8 500 ihp / 6 341 Kw = 18.50 kts
   Range 4 500nm at 10.00 kts
   Bunker at max displacement = 745 tons (100% coal)

Complement:
   316 - 411

Cost:
   £0.520 million / $2.079 million

Distribution of weights at normal displacement:
   Armament: 213 tons, 3.9 %
   Armour: 1 095 tons, 20.2 %
      - Belts: 492 tons, 9.1 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 191 tons, 3.5 %
      - Armour Deck: 387 tons, 7.1 %
      - Conning Tower: 26 tons, 0.5 %
   Machinery: 1 232 tons, 22.7 %
   Hull, fittings & equipment: 2 175 tons, 40.0 %
   Fuel, ammunition & stores: 631 tons, 11.6 %
   Miscellaneous weights: 85 tons, 1.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5 625 lbs / 2 551 Kg = 15.2 x 9.1 " / 230 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.49
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 12.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.34

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.495
   Length to Beam Ratio: 5.62 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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:      15.75 ft / 4.80 m
      - Forecastle (18 %):   13.12 ft / 4.00 m
      - Mid (50 %):      11.48 ft / 3.50 m
      - Quarterdeck (17 %):   11.48 ft / 3.50 m
      - Stern:      11.48 ft / 3.50 m
      - Average freeboard:   12.23 ft / 3.73 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111.1 %
      - Above water (accommodation/working, high = better): 126.8 %
   Waterplane Area: 17 691 Square feet or 1 644 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 98 lbs/sq ft or 477 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.39
      - 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]

Escort cruiser Tupac Yupanqui is made to work with Battleship Atahualpa (ld 1911).

Nickname of the ship: "la sombra de Atahualpa"

Tupac Yupanqui - laid down 1911H1 - in service 1912H2

------------------------------------------------------------------------------
Sept 1912 - minor adjustements in the shipyards at the end of the building.
- 4x120mm take the place of the 10x90mm
- Miscellaneous weights: 160 tons, was 150tons
------------------------------------------------------------------------------

After adjustements

6000T cruiser, Peru Escort Cruiser laid down 1911

Displacement:
   6 000 t light; 6 400 t standard; 7 101 t normal; 7 663 t full load

Dimensions: Length overall / water x beam x draught
   390.42 ft / 390.42 ft x 71.52 ft x 17.28 ft (normal load)
   119.00 m / 119.00 m x 21.80 m  x 5.27 m

Armament:
     4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1911 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, 1911 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     4 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1911 Model
     Breech loading 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, 1911 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4 089 lbs / 1 855 kg
   Shells per gun, main battery: 110
   4 - 21.0" / 533 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   246.06 ft / 75.00 m   9.19 ft / 2.80 m
   Ends:   2.36" / 60 mm   131.23 ft / 40.00 m   8.01 ft / 2.44 m
     13.12 ft / 4.00 m Unarmoured ends
     Main Belt covers 97 % 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:   1.57" / 40 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, 18 000 shp / 13 428 Kw = 21.51 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 263 tons

Complement:
   386 - 502

Cost:
   £0.742 million / $2.966 million

Distribution of weights at normal displacement:
   Armament: 511 tons, 7.2 %
   Armour: 1 321 tons, 18.6 %
      - Belts: 568 tons, 8.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 304 tons, 4.3 %
      - Armour Deck: 412 tons, 5.8 %
      - Conning Tower: 38 tons, 0.5 %
   Machinery: 730 tons, 10.3 %
   Hull, fittings & equipment: 3 277 tons, 46.1 %
   Fuel, ammunition & stores: 1 102 tons, 15.5 %
   Miscellaneous weights: 160 tons, 2.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8 621 lbs / 3 910 Kg = 10.0 x 12.0 " / 305 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.515
   Length to Beam Ratio: 5.46 : 1
   'Natural speed' for length: 19.76 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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 (20 %):   18.04 ft / 5.50 m
      - Mid (40 %):      14.44 ft / 4.40 m
      - Quarterdeck (20 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   15.86 ft / 4.83 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.0 %
      - Above water (accommodation/working, high = better): 140.0 %
   Waterplane Area: 18 863 Square feet or 1 752 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 129 lbs/sq ft or 628 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.30
      - 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

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

Before adjustements

6000T cruiser, Peru Escort Cruiser laid down 1911

Displacement:
   6 000 t light; 6 402 t standard; 7 104 t normal; 7 666 t full load

Dimensions: Length overall / water x beam x draught
   390.42 ft / 390.42 ft x 71.52 ft x 17.29 ft (normal load)
   119.00 m / 119.00 m x 21.80 m  x 5.27 m

Armament:
     4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1911 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, 1911 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     10 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1911 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, 1911 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4 100 lbs / 1 860 kg
   Shells per gun, main battery: 110
   4 - 21.0" / 457 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   246.06 ft / 75.00 m   9.19 ft / 2.80 m
   Ends:   2.36" / 60 mm   131.23 ft / 40.00 m   8.01 ft / 2.44 m
     13.12 ft / 4.00 m Unarmoured ends
     Main Belt covers 97 % 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:   1.57" / 40 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, 18 000 shp / 13 428 Kw = 21.51 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 263 tons

Complement:
   386 - 502

Cost:
   £0.743 million / $2.971 million

Distribution of weights at normal displacement:
   Armament: 513 tons, 7.2 %
   Armour: 1 327 tons, 18.7 %
      - Belts: 568 tons, 8.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 310 tons, 4.4 %
      - Armour Deck: 412 tons, 5.8 %
      - Conning Tower: 38 tons, 0.5 %
   Machinery: 731 tons, 10.3 %
   Hull, fittings & equipment: 3 280 tons, 46.2 %
   Fuel, ammunition & stores: 1 104 tons, 15.5 %
   Miscellaneous weights: 150 tons, 2.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8 633 lbs / 3 916 Kg = 10.0 x 12.0 " / 305 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.515
   Length to Beam Ratio: 5.46 : 1
   'Natural speed' for length: 19.76 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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 (20 %):   18.04 ft / 5.50 m
      - Mid (40 %):      14.44 ft / 4.40 m
      - Quarterdeck (20 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   15.86 ft / 4.83 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.0 %
      - Above water (accommodation/working, high = better): 140.0 %
   Waterplane Area: 18 863 Square feet or 1 752 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 129 lbs/sq ft or 628 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.30
      - 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