I've decided to rebuild my Los Andes Class gunboats.
New engines and boilers, more bunkerage (wood and coal), new 130mm casemate mounts aft, new turret armed with two 155mm French Grande Puissance Filloux guns with 30 degree elevation, new belt, new CT and deck armour over the engine spaces. AA weapons have been fitted and the misc weight sims four 81mm mortars (dismountable for land use) and ammo. Any thoughts?
Los Andes, La Plata, Argentina Gunboat laid down 1873 (Engine 1932)
Central citadel ship
Displacement:
1,321 t light; 1,389 t standard; 1,500 t normal; 1,589 t full load
Dimensions: Length overall / water x beam x draught
186.00 ft / 186.00 ft x 44.00 ft x 10.60 ft (normal load)
56.69 m / 56.69 m x 13.41 m x 3.23 m
Armament:
2 - 6.10" / 155 mm guns (1x2 guns), 97.00lbs / 44.00kg shells, 1917 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
6 - 5.12" / 130 mm guns in single mounts, 66.14lbs / 30.00kg shells, 1931 Model
Breech loading guns in casemate mounts
on side, all aft
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all aft, all raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 599 lbs / 271 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.07" / 205 mm 72.18 ft / 22.00 m 6.89 ft / 2.10 m
Ends: Unarmoured
Main Belt covers 60 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 9.00" / 229 mm 7.87" / 200 mm
2nd: 5.91" / 150 mm - -
3rd: 0.39" / 10 mm - -
4th: 0.39" / 10 mm - -
5th: 0.39" / 10 mm - -
- Armour deck: 0.59" / 15 mm, Conning tower: 5.91" / 150 mm
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 1,000 ihp / 746 Kw = 12.09 kts
Range 3,500nm at 10.00 kts
Bunker at max displacement = 200 tons (100% coal)
Complement:
119 - 156
Cost:
£0.122 million / $0.487 million
Distribution of weights at normal displacement:
Armament: 80 tons, 5.3 %
Armour: 509 tons, 33.9 %
- Belts: 223 tons, 14.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 204 tons, 13.6 %
- Armour Deck: 66 tons, 4.4 %
- Conning Tower: 17 tons, 1.1 %
Machinery: 62 tons, 4.1 %
Hull, fittings & equipment: 620 tons, 41.3 %
Fuel, ammunition & stores: 179 tons, 11.9 %
Miscellaneous weights: 50 tons, 3.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,810 lbs / 821 Kg = 21.4 x 6.1 " / 155 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 2.7 ft / 0.8 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.605
Length to Beam Ratio: 4.23 : 1
'Natural speed' for length: 13.64 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 49
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: 11.48 ft / 3.50 m
- Forecastle (5 %): 11.48 ft / 3.50 m (4.92 ft / 1.50 m aft of break)
- Mid (50 %): 4.92 ft / 1.50 m
- Quarterdeck (5 %): 11.48 ft / 3.50 m (4.92 ft / 1.50 m before break)
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 5.58 ft / 1.70 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.7 %
- Above water (accommodation/working, high = better): 47.4 %
Waterplane Area: 6,015 Square feet or 559 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.72
- Overall: 1.02
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is extremely poor