Armada Gun Boats

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1897
Rio Serena
Rio Moropa
1898
Rio Pastaza
Rio Tigre
1899
Rio Putumayo
Rio Napo
1900
Rio Samiria
Rio Pacaya

These ships are made for coastal operations

All scrapped in 1913

Rio Serena class, Peru 150T Coastal gunboat laid down 1897

Displacement:
   150 t light; 156 t standard; 166 t normal; 175 t full load

Dimensions: Length overall / water x beam x draught
   124.67 ft / 124.67 ft x 17.81 ft x 6.33 ft (normal load)
   38.00 m / 38.00 m x 5.43 m  x 1.93 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1897 Model
     Breech loading gun in deck mount
     on centreline
      3 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1897 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1897 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 26 lbs / 12 kg
   Shells per gun, main battery: 120

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 280 ihp / 209 Kw = 12.86 kts
   Range 2 000nm at 7.00 kts
   Bunker at max displacement = 19 tons (100% coal)

Complement:
   23 - 30

Cost:
   £0.015 million / $0.060 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.9 %
   Armour: 3 tons, 2.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 2.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 51 tons, 30.6 %
   Hull, fittings & equipment: 80 tons, 47.9 %
   Fuel, ammunition & stores: 16 tons, 9.7 %
   Miscellaneous weights: 13 tons, 7.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     190 lbs / 86 Kg = 14.0 x 3.0 " / 76 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 0.5 ft / 0.1 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.24
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
     and transom stern
   Block coefficient: 0.414
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.31 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 36
   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:      13.12 ft / 4.00 m
      - Forecastle (15 %):   12.30 ft / 3.75 m
      - Mid (40 %):      8.37 ft / 2.55 m
      - Quarterdeck (8 %):   8.37 ft / 2.55 m
      - Stern:      8.37 ft / 2.55 m
      - Average freeboard:   9.50 ft / 2.90 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 122.5 %
      - Above water (accommodation/working, high = better): 106.8 %
   Waterplane Area: 1 431 Square feet or 133 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 24 lbs/sq ft or 117 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 11.77
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   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

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1912
Rio Nevati
Rio Yucayali
Rio Pozulo
Rio Pisqui
1913
Rio Marano
Rio Apurimac
Rio Hualagua
Rio Puruis

To be rebuilt for Minesweeping in 1915H2

125T, Peru PB laid down 1912

Displacement:
   125 t light; 134 t standard; 141 t normal; 147 t full load

Dimensions: Length overall / water x beam x draught
   138.83 ft / 137.80 ft x 19.69 ft x 4.30 ft (normal load)
   42.31 m / 42.00 m x 6.00 m  x 1.31 m

Armament:
      2 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1912 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread
      2 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1912 Model
     Quick firing guns in deck mounts
     on centreline, all amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 53 lbs / 24 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.50" / 13 mm         -               -

Machinery:
   Petrol Internal combustion motors,
   Direct drive, 2 shafts, 545 shp / 406 Kw = 15.12 kts
   Range 2 500nm at 7.00 kts
   Bunker at max displacement = 13 tons

Complement:
   19 - 26

Cost:
   £0.013 million / $0.052 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 4.7 %
   Armour: 4 tons, 3.2 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 4 tons, 3.2 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 22 tons, 15.4 %
   Hull, fittings & equipment: 80 tons, 56.8 %
   Fuel, ammunition & stores: 16 tons, 11.5 %
   Miscellaneous weights: 12 tons, 8.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     294 lbs / 133 Kg = 13.2 x 3.5 " / 90 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.35
   Seaboat quality  (Average = 1.00): 1.93

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.424
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 11.74 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.81 ft / 3.60 m
      - Forecastle (15 %):   11.15 ft / 3.40 m
      - Mid (30 %):      10.50 ft / 3.20 m (7.22 ft / 2.20 m aft of break)
      - Quarterdeck (15 %):   7.22 ft / 2.20 m
      - Stern:      7.22 ft / 2.20 m
      - Average freeboard:   8.39 ft / 2.56 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.7 %
      - Above water (accommodation/working, high = better): 135.9 %
   Waterplane Area: 1 696 Square feet or 158 Square metres
   Displacement factor (Displacement / loading): 125 %
   Structure weight / hull surface area: 26 lbs/sq ft or 129 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 5.73
      - 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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Jefgte]

1912
Rio Nevati
Rio Yucayali
Rio Pozulo
Rio Pisqui
rebuilt for Minesweeping in 1915H1

1913
Rio Marano
Rio Apurimac
Rio Hualagua
Rio Puruis
Rebuilt for Minesweeping in 1915H2


Aft 90mm gun is remove & material for Minesweeping
installed.
Mis weight 22t was 12t


125T, Peru GB-Minesweeping laid down 1912

Displacement:
   125 t light; 132 t standard; 139 t normal; 145 t full load

Dimensions: Length overall / water x beam x draught
   138.83 ft / 137.80 ft x 19.69 ft x 4.23 ft (normal load)
   42.31 m / 42.00 m x 6.00 m  x 1.29 m

Armament:
     1 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1912 Model
     Quick firing gun in deck mount
     on centreline
     2 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1912 Model
     Quick firing guns in deck mounts
     on centreline, all amidships
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 30 lbs / 14 kg
   Shells per gun, main battery: 200

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.50" / 13 mm         -               -

Machinery:
   Petrol Internal combustion motors,
   Direct drive, 2 shafts, 540 shp / 403 Kw = 15.12 kts
   Range 350nm at 15.00 kts
2500nm -7kts
750nm - 12kts
350nm - 15kts
   Bunker at max displacement = 13 tons

Complement:
   19 - 26

Cost:
   £0.011 million / $0.042 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 2.7 %
   Armour: 3 tons, 2.2 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 2.2 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 22 tons, 15.5 %
   Hull, fittings & equipment: 75 tons, 54.0 %
   Fuel, ammunition & stores: 14 tons, 9.8 %
   Miscellaneous weights: 22 tons, 15.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     310 lbs / 141 Kg = 13.9 x 3.5 " / 90 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 0.5 ft / 0.2 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   Seaboat quality  (Average = 1.00): 1.92

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.424
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 11.74 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.81 ft / 3.60 m
      - Forecastle (15 %):   11.15 ft / 3.40 m
      - Mid (30 %):      10.50 ft / 3.20 m (7.22 ft / 2.20 m aft of break)
      - Quarterdeck (15 %):   7.22 ft / 2.20 m
      - Stern:      7.22 ft / 2.20 m
      - Average freeboard:   8.39 ft / 2.56 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.9 %
      - Above water (accommodation/working, high = better): 135.9 %
   Waterplane Area: 1 696 Square feet or 158 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 25 lbs/sq ft or 121 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 5.41
      - 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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather