...a dedicated trade-defence ship specializing in defence of convoys against cruisers and auxiliary cruisers.
Specifications:
Armament: main battery of four to six guns: 140mm, 194mm, 234mm, or 275mm. Secondary battery optional. Modest AA batttery. Appropriate Fire Control.
Armor: suitable against expected cruiser gunfire.
Speed: minimum required for adequate station-keeping in a convoy and range-keeping against likely auxiliary cruisers. Turbines preferred.
Range: Adequate for routing from Emeraldas (Ecuador) to Pago Pago (Samoa) or Cayenne (Guyana) to Banana (Kongo), with reserves. Mixed fuels an option.
Dimensions: Draught less than 5.0 metres; length less than 120 m.
Miscellaneous Weight: FC, as noted above; long-range wireless; modest construction reserve; other uses as deemed appropriate (troops, blimp mast, etc).
Cost: Minimal.
Summat like this?
Escort concept, Gran Colombia Escort Cruiser laid down 1912
Displacement:
4,776 t light; 5,039 t standard; 5,979 t normal; 6,730 t full load
Dimensions: Length overall / water x beam x draught
385.58 ft / 377.30 ft x 49.21 ft x 16.40 ft (normal load)
117.52 m / 115.00 m x 15.00 m x 5.00 m
Armament:
6 - 7.64" / 194 mm guns (3x2 guns), 231.49lbs / 105.00kg shells, 1912 Model
Breech loading guns in deck mounts with hoists
on centreline, evenly spread
Aft Main mounts separated by engine room
8 - 3.94" / 100 mm guns (4x2 guns), 33.07lbs / 15.00kg shells, 1912 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread
Weight of broadside 1,653 lbs / 750 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 264.11 ft / 80.50 m 16.40 ft / 5.00 m
Ends: Unarmoured
Main Belt covers 108 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 3.94" / 100 mm 5.91" / 150 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm 0.39" / 10 mm
- Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 12,504 shp / 9,328 Kw = 20.00 kts
Range 7,500nm at 14.00 kts
Bunker at max displacement = 1,691 tons
Complement:
339 - 441
Cost:
£0.403 million / $1.612 million
Distribution of weights at normal displacement:
Armament: 198 tons, 3.3 %
Armour: 1,837 tons, 30.7 %
- Belts: 1,087 tons, 18.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 173 tons, 2.9 %
- Armour Deck: 536 tons, 9.0 %
- Conning Tower: 42 tons, 0.7 %
Machinery: 499 tons, 8.3 %
Hull, fittings & equipment: 1,943 tons, 32.5 %
Fuel, ammunition & stores: 1,202 tons, 20.1 %
Miscellaneous weights: 300 tons, 5.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,489 lbs / 5,211 Kg = 51.6 x 7.6 " / 194 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 2.1 ft / 0.7 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 81 %
- Recoil effect (Restricted arc if above 1.00): 0.89
Seaboat quality (Average = 1.00): 1.62
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.687
Length to Beam Ratio: 7.67 : 1
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.69 ft / 6.00 m
- Forecastle (15 %): 16.40 ft / 5.00 m
- Mid (50 %): 16.40 ft / 5.00 m
- Quarterdeck (15 %): 16.40 ft / 5.00 m
- Stern: 16.40 ft / 5.00 m
- Average freeboard: 16.60 ft / 5.06 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.1 %
- Above water (accommodation/working, high = better): 135.6 %
Waterplane Area: 14,710 Square feet or 1,367 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 86 lbs/sq ft or 419 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.99
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
100 tons - cruiser Fire Control
25 tons - long range wireless
25 tons - 2 bed sickbay
50 tons - construction reserve
Rocky: I'm assuming you want this using GC standard guns and components, right?
Valles: Yes, that's one option. Does it work out if you stick those main guns in turrets?
G: Indeed - hence my armament specification.
She puts on some weight, about five hundred tons, but yeah, it's do-able.
And oops! Does GC have a hundred millimeter?
Oh, yes. It's the standard main battery on my tin cans.
Study from Peru,
Peru Design Bureau choose to have 6 x194 guns in boardside, serious to engage auxiliary cruiser or 27kts cruisers with 6" guns.
Correct cruiser protection & a speed to escort convoy & work in a battleline if neccessary.
200t reserve weight.
Distance from Callao to Pago Pago 5000nm, so 7000nm range is certainly enough.
Peru could built 3 ECs for GC in 1918, 3 x 120 SW are free, 2 in Chimbote & 1 in Pisco.
--------------------------------------
Protector, GC Escort Cruiser laid down 1917 (Engine 1916)
Displacement:
3 700 t light; 3 904 t standard; 4 328 t normal; 4 667 t full load
Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 49.21 ft x 14.22 ft (normal load)
120.00 m / 120.00 m x 15.00 m x 4.33 m
Armament:
6 - 7.64" / 194 mm guns (3x2 guns), 222.78lbs / 101.05kg shells, 1917 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread
Aft Main mounts separated by engine room
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1917 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1 391 lbs / 631 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 255.91 ft / 78.00 m 10.17 ft / 3.10 m
Ends: 1.57" / 40 mm 98.43 ft / 30.00 m 9.19 ft / 2.80 m
39.37 ft / 12.00 m Unarmoured ends
Main Belt covers 100 % 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: 0.50" / 13 mm - -
3rd: 0.50" / 13 mm - -
- Armour deck: 1.18" / 30 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16 800 shp / 12 533 Kw = 23.06 kts
Range 7 000nm at 12.00 kts
Bunker at max displacement = 763 tons
Complement:
266 - 346
Cost:
£0.660 million / $2.641 million
Distribution of weights at normal displacement:
Armament: 174 tons, 4.0 %
Armour: 935 tons, 21.6 %
- Belts: 402 tons, 9.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 220 tons, 5.1 %
- Armour Deck: 295 tons, 6.8 %
- Conning Tower: 18 tons, 0.4 %
Machinery: 626 tons, 14.5 %
Hull, fittings & equipment: 1 765 tons, 40.8 %
Fuel, ammunition & stores: 628 tons, 14.5 %
Miscellaneous weights: 200 tons, 4.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6 070 lbs / 2 753 Kg = 27.2 x 7.6 " / 194 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 2.0 ft / 0.6 m
Roll period: 14.7 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.70
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 53 %
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: 20.01 ft / 6.10 m
- Forecastle (20 %): 16.73 ft / 5.10 m
- Mid (50 %): 13.45 ft / 4.10 m
- Quarterdeck (18 %): 13.45 ft / 4.10 m
- Stern: 13.45 ft / 4.10 m
- Average freeboard: 14.86 ft / 4.53 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.4 %
- Above water (accommodation/working, high = better): 108.5 %
Waterplane Area: 13 522 Square feet or 1 256 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 87 lbs/sq ft or 425 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.59
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
How about this?
Protector, Gran Colombia Escort laid down 1917 (Engine 1916)
Displacement:
3,000 t light; 3,206 t standard; 3,645 t normal; 3,996 t full load
Dimensions: Length overall / water x beam x draught
364.88 ft / 360.89 ft x 49.21 ft x 13.94 ft (normal load)
111.22 m / 110.00 m x 15.00 m x 4.25 m
Armament:
4 - 5.51" / 140 mm guns in single mounts, 83.78lbs / 38.00kg shells, 1917 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
6 - 5.51" / 140 mm guns in single mounts, 83.78lbs / 38.00kg shells, 1917 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
2 - 2.56" / 65.0 mm guns in single mounts, 8.82lbs / 4.00kg shells, 1917 Model
Anti-aircraft guns in deck mounts
on centreline, all amidships
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1917 Model
Machine guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 855 lbs / 388 kg
Shells per gun, main battery: 250
2 - 20.0" / 508 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 234.58 ft / 71.50 m 16.01 ft / 4.88 m
Ends: 1.97" / 50 mm 126.31 ft / 38.50 m 16.01 ft / 4.88 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 2.95" / 75 mm
2nd: 3.94" / 100 mm 1.97" / 50 mm 2.95" / 75 mm
3rd: 0.79" / 20 mm - -
- Armour deck: 0.98" / 25 mm, Conning tower: 3.94" / 100 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 2 shafts, 8,867 shp / 6,615 Kw = 20.00 kts
Range 7,000nm at 12.00 kts
Bunker at max displacement = 791 tons (50% coal)
Complement:
233 - 304
Cost:
£0.442 million / $1.768 million
Distribution of weights at normal displacement:
Armament: 107 tons, 2.9 %
Armour: 1,014 tons, 27.8 %
- Belts: 655 tons, 18.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 121 tons, 3.3 %
- Armour Deck: 218 tons, 6.0 %
- Conning Tower: 20 tons, 0.6 %
Machinery: 346 tons, 9.5 %
Hull, fittings & equipment: 1,284 tons, 35.2 %
Fuel, ammunition & stores: 645 tons, 17.7 %
Miscellaneous weights: 250 tons, 6.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,306 lbs / 2,861 Kg = 75.3 x 5.5 " / 140 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 2.3 ft / 0.7 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.23
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.515
Length to Beam Ratio: 7.33 : 1
'Natural speed' for length: 19.00 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: -4.10 ft / -1.25 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.01 ft / 4.88 m
- Forecastle (20 %): 16.01 ft / 4.88 m
- Mid (45 %): 16.01 ft / 4.88 m (8.01 ft / 2.44 m aft of break)
- Quarterdeck (15 %): 8.01 ft / 2.44 m
- Stern: 8.01 ft / 2.44 m
- Average freeboard: 11.61 ft / 3.54 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.5 %
- Above water (accommodation/working, high = better): 101.1 %
Waterplane Area: 11,999 Square feet or 1,115 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 76 lbs/sq ft or 369 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.24
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Interesting - why'd you opt for 140mm versus something heavier - rate of fire?
Well, I was going to go w/ some 194mm but decided that 140 is sufficient against any AMC and should be effective against CLs. Plus your encyclopedia says that the 194mm is "No longer in use" so I figured it would take a while to tool up the foundries to produce more.
The old Colombian version is out of service, but I bought and digested the newer DKB iteration of the gun and its turret.
Quote from: The Rock Doctor on July 15, 2009, 12:08:55 PM
The old Colombian version is out of service, but I bought and digested the newer DKB iteration of the gun and its turret.
Oh, yeah, um, that right. I was just testing your memory. :D
Deep in the sub-basement of the offices of the Confederate Bureau of Ships in Norfolk, VA, designers work on what they think might be a good submission to the Colombian design contest (though they'll never see the light of day).
The first:
Quote
Design Submission, Gran Colombia Gunboat laid down 1917 (Engine 1916)
Displacement:
3,330 t light; 3,447 t standard; 3,837 t normal; 4,149 t full load
Dimensions: Length overall / water x beam x draught
313.31 ft / 295.28 ft x 50.30 ft x 16.40 ft (normal load)
95.50 m / 90.00 m x 15.33 m x 5.00 m
Armament:
4 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.98kg shells, 1917 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1917 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1917 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 352 lbs / 160 kg
Shells per gun, main battery: 200
4 - 21.0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 152.56 ft / 46.50 m 9.84 ft / 3.00 m
Ends: 2.95" / 75 mm 142.72 ft / 43.50 m 9.84 ft / 3.00 m
Upper: 3.94" / 100 mm 152.56 ft / 46.50 m 8.20 ft / 2.50 m
Main Belt covers 79 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.98" / 25 mm 1.57" / 40 mm
- Armour deck: 1.97" / 50 mm, Conning tower: 3.94" / 100 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 2 shafts, 20,000 shp / 14,920 Kw = 23.46 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 702 tons (25% coal)
Complement:
243 - 316
Cost:
£0.473 million / $1.893 million
Distribution of weights at normal displacement:
Armament: 44 tons, 1.1 %
Armour: 1,081 tons, 28.2 %
- Belts: 660 tons, 17.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 23 tons, 0.6 %
- Armour Deck: 378 tons, 9.8 %
- Conning Tower: 21 tons, 0.5 %
Machinery: 762 tons, 19.9 %
Hull, fittings & equipment: 1,263 tons, 32.9 %
Fuel, ammunition & stores: 507 tons, 13.2 %
Miscellaneous weights: 179 tons, 4.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,194 lbs / 2,810 Kg = 74.0 x 5.5 " / 140 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.1 ft / 0.6 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.551
Length to Beam Ratio: 5.87 : 1
'Natural speed' for length: 17.18 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (13 %): 21.33 ft / 6.50 m
- Mid (58 %): 18.04 ft / 5.50 m
- Quarterdeck (17 %): 18.04 ft / 5.50 m
- Stern: 18.86 ft / 5.75 m
- Average freeboard: 19.45 ft / 5.93 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.4 %
- Above water (accommodation/working, high = better): 126.6 %
Waterplane Area: 10,376 Square feet or 964 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 71 lbs/sq ft or 344 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.22
- 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
Misc Weights:
100t: Fire Control
25t: Long Range Wireless
8t: 4 torpedoes
46t: Mission Payload, which can include:
138 depth charges
46 mines
1 squad of Marines
Or going in an entirely different direction, it's a well armed, armored Oiler. Why worry about coal when you can bring all the fuel you need with you. Also it might be able to refuel a destroyer or two.
Quote
Submission 2, Gran Colombia Gunboat Thingy laid down 1917 (Engine 1916)
Displacement:
7,800 t light; 8,267 t standard; 13,056 t normal; 16,887 t full load
Dimensions: Length overall / water x beam x draught
557.73 ft / 539.70 ft x 68.90 ft x 22.97 ft (normal load)
170.00 m / 164.50 m x 21.00 m x 7.00 m
Armament:
6 - 7.64" / 194 mm guns (3x2 guns), 222.78lbs / 101.05kg shells, 1917 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1917 Model
Quick firing guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1917 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1917 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,476 lbs / 669 kg
Shells per gun, main battery: 245
4 - 21.0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 160.83 ft / 49.02 m 9.84 ft / 3.00 m
Ends: 1.97" / 50 mm 378.87 ft / 115.48 m 9.84 ft / 3.00 m
Upper: 3.94" / 100 mm 160.76 ft / 49.00 m 8.20 ft / 2.50 m
Main Belt covers 46 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.57" / 40 mm 3.94" / 100 mm
2nd: 0.98" / 25 mm 0.98" / 25 mm -
- Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 30,000 shp / 22,380 Kw = 23.16 kts
Range 63,300nm at 10.00 kts
Bunker at max displacement = 8,619 tons
Complement:
609 - 793
Cost:
£1.063 million / $4.250 million
Distribution of weights at normal displacement:
Armament: 184 tons, 1.4 %
Armour: 1,927 tons, 14.8 %
- Belts: 861 tons, 6.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 274 tons, 2.1 %
- Armour Deck: 746 tons, 5.7 %
- Conning Tower: 47 tons, 0.4 %
Machinery: 1,118 tons, 8.6 %
Hull, fittings & equipment: 3,982 tons, 30.5 %
Fuel, ammunition & stores: 5,255 tons, 40.3 %
Miscellaneous weights: 589 tons, 4.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
35,053 lbs / 15,900 Kg = 157.3 x 7.6 " / 194 mm shells or 4.6 torpedoes
Stability (Unstable if below 1.00): 1.42
Metacentric height 5.3 ft / 1.6 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.78
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.535
Length to Beam Ratio: 7.83 : 1
'Natural speed' for length: 23.23 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (13 %): 21.33 ft / 6.50 m
- Mid (50 %): 18.04 ft / 5.50 m
- Quarterdeck (17 %): 18.04 ft / 5.50 m
- Stern: 18.86 ft / 5.75 m
- Average freeboard: 19.32 ft / 5.89 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 45.5 %
- Above water (accommodation/working, high = better): 140.2 %
Waterplane Area: 25,591 Square feet or 2,377 Square metres
Displacement factor (Displacement / loading): 210 %
Structure weight / hull surface area: 102 lbs/sq ft or 498 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.45
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
100t: Fire control
25t: Long Range Wireless
8t: 4 torpedoes
456t: Various mission materials
Edit: Realized it could fit in a type 2 dock, so I fixed that.
That's something you don't see every day. Would it not be considered a little flammable for a combattant?
Well.... I figure that most of the fuel would be stored forward and aft outside the armored citadel, but still behind the end belts. So while chances might be a little better of a fuel fire, it's effect on the ship as a whole shouldn't be too extreme. Worst case some sort of tank voiding and watering system could be worked in in the misc weight.
Still, we're talking about heavy fuel oil here: it's not the most combustible stuff. I think if the tanks were adequately subdivided it would be no more of a concern than in a large conventional cruiser.
This is an option I'm tinkering with myself...
Enter ship name, Enter country Enter ship type laid down 1916
Displacement:
2,328 t light; 2,433 t standard; 2,785 t normal; 3,066 t full load
Dimensions: Length overall / water x beam x draught
332.08 ft / 328.08 ft x 52.49 ft x 11.32 ft (normal load)
101.22 m / 100.00 m x 16.00 m x 3.45 m
Armament:
4 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.97kg shells, 1916 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
Breech loading guns in deck mounts
on side, all aft, all raised mounts - superfiring
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
Breech loading guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 352 lbs / 160 kg
Shells per gun, main battery: 250
4 - 21.0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 213.25 ft / 65.00 m 11.81 ft / 3.60 m
Ends: 0.98" / 25 mm 114.80 ft / 34.99 m 11.81 ft / 3.60 m
Upper: 0.98" / 25 mm 213.25 ft / 65.00 m 7.87 ft / 2.40 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.98" / 25 mm 2.95" / 75 mm
3rd: 0.98" / 25 mm - -
4th: 0.39" / 10 mm - -
- Armour deck: 0.98" / 25 mm, Conning tower: 2.95" / 75 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 2 shafts, 8,000 shp / 5,968 Kw = 20.03 kts
Range 10,000nm at 10.00 kts (Bunkerage = 633 tons)
Complement:
191 - 249
Cost:
£0.265 million / $1.060 million
Distribution of weights at normal displacement:
Armament: 44 tons, 1.6 %
Armour: 695 tons, 25.0 %
- Belts: 445 tons, 16.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 28 tons, 1.0 %
- Armour Deck: 209 tons, 7.5 %
- Conning Tower: 13 tons, 0.5 %
Machinery: 311 tons, 11.2 %
Hull, fittings & equipment: 1,128 tons, 40.5 %
Fuel, ammunition & stores: 457 tons, 16.4 %
Miscellaneous weights: 150 tons, 5.4 %
-100 t: Fire control
-25 t: Long-range wireless
-25 t: Flag facilities
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,980 lbs / 3,620 Kg = 95.3 x 5.5 " / 140 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 3.1 ft / 0.9 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.56
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.64 ft / 6.90 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 19.69 ft / 6.00 m (11.81 ft / 3.60 m aft of break)
- Quarterdeck (15 %): 11.81 ft / 3.60 m
- Stern: 11.81 ft / 3.60 m
- Average freeboard: 15.98 ft / 4.87 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 56.1 %
- Above water (accommodation/working, high = better): 148.5 %
Waterplane Area: 11,475 Square feet or 1,066 Square metres
Displacement factor (Displacement / loading): 153 %
Structure weight / hull surface area: 69 lbs/sq ft or 334 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.19
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
4x140 for main armament, that's short...
Peru did'nt consider serious warship with 4 main guns.
6 main guns are now neccessary to obtain enough hits probability.
;)
Hmm Rocky,
I'm not so concerned with # barrels as the ROF still allows frequent enough splashes to adjust aim. However, having 4 x 140mm means it won't outgun a thing.
It's basically a slow armored destroyer. Against an auxiliary cruiser it may be adequate, but a Q-ship would be better. Against an actual cruiser, I think a 6" gunned cruiser should outgun and outarmor it, and have the speed to pick an advantageous range.
IF you are going with the 140mm, it should be traded for more barrels and armor, not for a smaller vessel, IMHO. I'd stick with matching or outgunning opposing vessels on a slightly smaller to same size hull.
Ok, here is somewhat the other end of what's been presented so far.
Larger, slow and tubby, robustly armored, an excellent gunnery platform with a powerful battery. A more expensive option than others, but more capable.
The real regret is I didn't get it under 5,000 tons light. However the design goal is for a faster Cruiser or AMC to have no range at which they have a decided advantage.
Since this likely comes from the Stabilimento Tecnico Triestino architects, the engine tech is a little dated.
Quote
Rio Congo, Gran Columbia Escort Cruiser laid down 1916 (Engine 1912)
Displacement:
5,646 t light; 5,922 t standard; 7,319 t normal; 8,437 t full load
Dimensions: Length overall / water x beam x draught
360.89 ft / 360.89 ft x 72.18 ft x 16.04 ft (normal load)
110.00 m / 110.00 m x 22.00 m x 4.89 m
Armament:
6 - 7.64" / 194 mm guns in single mounts, 222.78lbs / 101.05kg shells, 1916 Model
Breech loading guns in deck mounts with hoists
on centreline, evenly spread, 3 raised mounts
8 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1916 Model
Quick firing guns in deck mounts
on side, evenly spread
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 1,598 lbs / 725 kg
Shells per gun, main battery: 140
4 - 21.0" / 533.4 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 234.58 ft / 71.50 m 13.12 ft / 4.00 m
Ends: 1.97" / 50 mm 126.28 ft / 38.49 m 13.12 ft / 4.00 m
Upper: 3.94" / 100 mm 234.58 ft / 71.50 m 10.86 ft / 3.31 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.92" / 125 mm 0.98" / 25 mm 0.98" / 25 mm
2nd: 0.98" / 25 mm 0.79" / 20 mm -
3rd: 0.59" / 15 mm - -
- Armour deck: 1.57" / 40 mm, Conning tower: 5.91" / 150 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Electric motors, 2 shafts, 12,309 shp / 9,182 Kw = 19.00 kts
Range 9,500nm at 12.50 kts
Bunker at max displacement = 2,515 tons (90% coal)
Complement:
395 - 514
Cost:
£0.720 million / $2.881 million
Distribution of weights at normal displacement:
Armament: 200 tons, 2.7 %
Armour: 2,112 tons, 28.9 %
- Belts: 1,392 tons, 19.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 110 tons, 1.5 %
- Armour Deck: 562 tons, 7.7 %
- Conning Tower: 48 tons, 0.7 %
Machinery: 535 tons, 7.3 %
Hull, fittings & equipment: 2,425 tons, 33.1 %
Fuel, ammunition & stores: 1,673 tons, 22.9 %
Miscellaneous weights: 375 tons, 5.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
17,820 lbs / 8,083 Kg = 80.0 x 7.6 " / 194 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 5.4 ft / 1.6 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.50
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.613
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 19.00 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): -10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.23 ft / 6.47 m
- Forecastle (20 %): 21.23 ft / 6.47 m
- Mid (50 %): 21.23 ft / 6.47 m (13.62 ft / 4.15 m aft of break)
- Quarterdeck (15 %): 13.62 ft / 4.15 m
- Stern: 13.62 ft / 4.15 m
- Average freeboard: 17.42 ft / 5.31 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 54.9 %
- Above water (accommodation/working, high = better): 159.3 %
Waterplane Area: 19,284 Square feet or 1,792 Square metres
Displacement factor (Displacement / loading): 142 %
Structure weight / hull surface area: 94 lbs/sq ft or 460 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.20
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Miscellaneous weight :
200 tons fire control
12 tons torpedoes + reloads
25 tons long range wireless.
138 tons unallocated.
---
That's pretty sturdy, alright. I like the inclusion of the ram bow as a contingency measure.
I just like how they look, and at lower speeds why not?
I mean.... who doesn't like a rambo on their side?
Anyhow it's kinda the other extreme from the other ships.
A slightly smaller version, utilizing a simpler engine design and mixed firing. The advantage this has is it can use any port, yet would still be a tough opponent for an AMC or CL.
note : goofed on main guns, supposed to be dispersed, with an amidships mount, not ends.
Quote
Enter ship name, Enter country Enter ship type laid down 1916
Displacement:
4,992 t light; 5,258 t standard; 6,326 t normal; 7,180 t full load
Dimensions: Length overall / water x beam x draught
324.80 ft / 324.80 ft x 72.18 ft x 15.58 ft (normal load)
99.00 m / 99.00 m x 22.00 m x 4.75 m
Armament:
5 - 7.64" / 194 mm guns in single mounts, 222.78lbs / 101.05kg shells, 1916 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 2 raised mounts - superfiring
8 - 5.51" / 140 mm guns in single mounts, 83.72lbs / 37.98kg shells, 1916 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 1,800 lbs / 817 kg
Shells per gun, main battery: 130
4 - 21.0" / 533.4 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 211.12 ft / 64.35 m 10.33 ft / 3.15 m
Ends: 1.97" / 50 mm 113.65 ft / 34.64 m 10.33 ft / 3.15 m
Upper: 1.97" / 50 mm 211.12 ft / 64.35 m 12.80 ft / 3.90 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 1.97" / 50 mm 1.97" / 50 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 0.79" / 20 mm
3rd: 0.79" / 20 mm - -
- Armour deck: 1.57" / 40 mm, Conning tower: 5.91" / 150 mm
Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 9,555 ihp / 7,128 Kw = 18.00 kts
Range 9,000nm at 12.00 kts
Bunker at max displacement = 1,922 tons (75% coal)
Complement:
354 - 461
Cost:
£0.735 million / $2.939 million
Distribution of weights at normal displacement:
Armament: 225 tons, 3.6 %
Armour: 1,613 tons, 25.5 %
- Belts: 916 tons, 14.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 152 tons, 2.4 %
- Armour Deck: 502 tons, 7.9 %
- Conning Tower: 44 tons, 0.7 %
Machinery: 609 tons, 9.6 %
Hull, fittings & equipment: 2,194 tons, 34.7 %
Fuel, ammunition & stores: 1,334 tons, 21.1 %
Miscellaneous weights: 350 tons, 5.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,649 lbs / 5,284 Kg = 52.3 x 7.6 " / 194 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 5.2 ft / 1.6 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.42
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.606
Length to Beam Ratio: 4.50 : 1
'Natural speed' for length: 18.02 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 19.85 ft / 6.05 m
- Forecastle (20 %): 19.82 ft / 6.04 m
- Mid (50 %): 19.82 ft / 6.04 m (12.63 ft / 3.85 m aft of break)
- Quarterdeck (15 %): 12.63 ft / 3.85 m
- Stern: 12.63 ft / 3.85 m
- Average freeboard: 16.23 ft / 4.95 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 70.4 %
- Above water (accommodation/working, high = better): 148.0 %
Waterplane Area: 17,243 Square feet or 1,602 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 97 lbs/sq ft or 474 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.49
- 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
It would be powerful, but I have to think deck space would be an issue...
France has this kind of vessels for a while.
http://www.navalism.org/index.php?topic=1628.msg19047#msg19047
Quote from: The Rock Doctor on July 22, 2009, 07:54:52 AM
It would be powerful, but I have to think deck space would be an issue...
Well, I am not good at drawing these things out, and tend to go with analogies. I was going to have a smaller secondary suite, but with the width and high BC, it's basically 3 destroyers wide. Length wise, I'd thik the centerline weapons should work. Middle destroyer for centerline, wing destroyers for 2ndaries.
Try to get heavy fuel burning ... it aint easy, and probably not even possible without preheating.
It's not that this ship would carry bunkers full of light fuel or gas.
Quote from: The Rock Doctor on July 22, 2009, 07:54:52 AM
It would be powerful, but I have to think deck space would be an issue...
Example :
The GC Jatibonico class is 84m x 8m, featuring 5 guns spots and 2 sets of torpedo tubes on centerline. Waterline area is 414m sq.
The proposed vessel has 5 gun spots on centerline (albeit longer guns), but no torpedo tubes above deck, is 15m longer and is 14m wider, with 3.9x the waterline area. I'd think the secondary 140mm would fit in that extra 7m to each side.
In my opinion this is a role for the older Audacity class or Sentinelas.
That said, I also think that protected or light cruisers are best stopped by armored cruisers. My idea would be for a slow armored cruiser, with more than enough speed to keep station on lumbering merchant hulls. Such ships can then at least defend themselves from other armored cruisers, something a smaller hull would have trouble with.
My concept would be a three-turreted ship, utilizing the 234mm. As this caliber came to GC from the former IC ships, I'm not sure resurrecting it is the best idea, but I think that it provides the best caliber option of those offered for this ship.
As an escort, I think such a ship only needs secondaries for self defense, as DD or TB shouldn't be a problem (if they are, they are probably escorting forces this ship won't be able to deal with) and any cruiser should be handled by the main battery.
Not being entirely familiar with the Navalism rules, I've set an arbitrary amount aside for fire control, wireless and margin, though it may be a bit light.
I have also sketched the ship to provide a visualization of the concept.
(http://img.photobucket.com/albums/v79/gstararies/Rocky_EACR17.png)
RockyGCEACR17, Rocky_GC EACR laid down 1916
Displacement:
5,018 t light; 5,358 t standard; 5,832 t normal; 6,211 t full load
Dimensions: Length overall / water x beam x draught
387.14 ft / 387.14 ft x 55.77 ft x 16.08 ft (normal load)
118.00 m / 118.00 m x 17.00 m x 4.90 m
Armament:
6 - 9.21" / 234 mm guns (3x2 guns), 390.95lbs / 177.33kg shells, 1916 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread
Aft Main mounts separated by engine room
8 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1916 Model
Quick firing guns in casemate mounts
on side, evenly spread, 4 raised mounts
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 2,607 lbs / 1,182 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.51" / 140 mm 180.45 ft / 55.00 m 18.04 ft / 5.50 m
Ends: 2.36" / 60 mm 180.45 ft / 55.00 m 11.48 ft / 3.50 m
26.25 ft / 8.00 m Unarmoured ends
Upper: 2.95" / 75 mm 180.45 ft / 55.00 m 8.20 ft / 2.50 m
Main Belt covers 72 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.87" / 200 mm 2.95" / 75 mm 7.09" / 180 mm
2nd: 2.95" / 75 mm - -
- Armour deck: 1.18" / 30 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 3 shafts, 7,989 shp / 5,959 Kw = 18.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 853 tons (65% coal)
Complement:
333 - 433
Cost:
£0.808 million / $3.231 million
Distribution of weights at normal displacement:
Armament: 326 tons, 5.6 %
Armour: 2,034 tons, 34.9 %
- Belts: 1,226 tons, 21.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 467 tons, 8.0 %
- Armour Deck: 341 tons, 5.9 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 316 tons, 5.4 %
Hull, fittings & equipment: 2,192 tons, 37.6 %
Fuel, ammunition & stores: 814 tons, 14.0 %
Miscellaneous weights: 150 tons, 2.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,127 lbs / 4,140 Kg = 23.3 x 9.2 " / 234 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.6 ft / 0.8 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.27
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.588
Length to Beam Ratio: 6.94 : 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): -15.00 degrees
Stern overhang: -3.94 ft / -1.20 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.11 ft / 4.30 m
- Forecastle (18 %): 14.11 ft / 4.30 m
- Mid (65 %): 14.11 ft / 4.30 m (7.22 ft / 2.20 m aft of break)
- Quarterdeck (12 %): 7.22 ft / 2.20 m
- Stern: 7.22 ft / 2.20 m
- Average freeboard: 11.70 ft / 3.57 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.3 %
- Above water (accommodation/working, high = better): 92.3 %
Waterplane Area: 15,616 Square feet or 1,451 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 102 lbs/sq ft or 500 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.30
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
150t firecontrol, wireless, etc.
++++++++++++++++++++++++++++++++++++++++
Simmed in SS2.
Regards,
Hey Rich,
This may have been a role for the Audacity and Sentinela types, but they're all either sold or will be. Besides, the limited operating range and freeboard of the types seemed detrimental to the mission.
I did research a modern 234mm gun several sim-years back, so could introduce such a model again.
What you've presented is powerful and well armored, but her freeboard in particular worries me - especially aft. It doesn't seem compatible with a mission that will take her into the mid-Atlantic.
Rocky,
Actually, as I originally simmed her, freeboard was 6.5m forward and 4.4 aft, and she had the 'fire in the heaviest weather' advantage (seaboat quality was 1.9). But as you specified economy, and with those stats she was close to 6000 tons, I decided she needed to go on a diet.
Still, even with the stepped quarter deck, she was has the Good Seaboat advantage, and that lower freeboard aft only is for 35% of her length.
If you'd like, I'll return her to her original sim state and you can evaluate that version with respect to your concerns.
Regards,
I'd be interested in seeing that variant as well....
(http://img.photobucket.com/albums/v79/gstararies/Rocky_EACR17-orig.png)
RockyGCEACR17-orig, Rocky_GC EACR laid down 1916
Displacement:
5,647 t light; 6,000 t standard; 6,511 t normal; 6,919 t full load
Dimensions: Length overall / water x beam x draught
387.14 ft / 387.14 ft x 59.06 ft x 16.08 ft (normal load)
118.00 m / 118.00 m x 18.00 m x 4.90 m
Armament:
6 - 9.21" / 234 mm guns (3x2 guns), 390.95lbs / 177.33kg shells, 1916 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread
Main guns limited to end-on fire
Aft Main mounts separated by engine room
8 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1916 Model
Quick firing guns in casemate mounts
on side, evenly spread, 4 raised mounts
2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 2,607 lbs / 1,182 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.51" / 140 mm 180.45 ft / 55.00 m 16.40 ft / 5.00 m
Ends: 2.36" / 60 mm 180.45 ft / 55.00 m 9.84 ft / 3.00 m
26.25 ft / 8.00 m Unarmoured ends
Upper: 2.95" / 75 mm 180.45 ft / 55.00 m 8.20 ft / 2.50 m
Main Belt covers 72 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.87" / 200 mm 2.95" / 75 mm 7.09" / 180 mm
2nd: 2.95" / 75 mm - -
- Armour deck: 1.18" / 30 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 3 shafts, 8,715 shp / 6,501 Kw = 18.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 919 tons (65% coal)
Complement:
362 - 471
Cost:
£0.850 million / $3.401 million
Distribution of weights at normal displacement:
Armament: 326 tons, 5.0 %
Armour: 2,112 tons, 32.4 %
- Belts: 1,135 tons, 17.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 605 tons, 9.3 %
- Armour Deck: 372 tons, 5.7 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 345 tons, 5.3 %
Hull, fittings & equipment: 2,714 tons, 41.7 %
Fuel, ammunition & stores: 864 tons, 13.3 %
Miscellaneous weights: 150 tons, 2.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,479 lbs / 6,114 Kg = 34.5 x 9.2 " / 234 mm shells or 2.5 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 2.4 ft / 0.7 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 1.14
Seaboat quality (Average = 1.00): 1.98
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.620
Length to Beam Ratio: 6.56 : 1
'Natural speed' for length: 19.68 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): -15.00 degrees
Stern overhang: -3.94 ft / -1.20 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (18 %): 21.33 ft / 6.50 m
- Mid (65 %): 21.33 ft / 6.50 m (14.44 ft / 4.40 m aft of break)
- Quarterdeck (12 %): 14.44 ft / 4.40 m
- Stern: 14.44 ft / 4.40 m
- Average freeboard: 18.91 ft / 5.77 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.2 %
- Above water (accommodation/working, high = better): 150.3 %
Waterplane Area: 17,036 Square feet or 1,583 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 108 lbs/sq ft or 526 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.34
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
150t firecontrol, wireless, etc.
Interesting, and I may tinker with it. There's an issue with recoil that will have to be considered - probably as a result of the higher freeboard.
Quote from: Kaiser Kirk on July 23, 2009, 04:51:57 PM
Quote from: The Rock Doctor on July 22, 2009, 07:54:52 AM
It would be powerful, but I have to think deck space would be an issue...
Example :
The GC Jatibonico class is 84m x 8m, featuring 5 guns spots and 2 sets of torpedo tubes on centerline. Waterline area is 414m sq.
The proposed vessel has 5 gun spots on centerline (albeit longer guns), but no torpedo tubes above deck, is 15m longer and is 14m wider, with 3.9x the waterline area. I'd think the secondary 140mm would fit in that extra 7m to each side.
The overall dimensions are not the critical factor, the amount of citadel is. If you want all the guns and their magazines to be protected by the main belt then 64m and not 99m is the limiting factor. If the guns are L50 they are just short of 10m long. With some workspace behind them in a turret; let's say 13m for the centreline gun and 5m for the end guns in dackspace need, this will give you less then 30m for the superstructure and the secondaries (less then the space needed by the main guns due to blast effects)..
Geez, been awhile since I spooled up SpringSharp...
A private DKB designer sends a package to the Armada with the following deign. With notes:
-Torpedo tube mounted in ram bow for last-ditch convoy defense. Shoot a torpedo to 'sofen up' where you intend to ram.
-Auxilary coal boilers to allow for emergency use of stores taken from older merchies being escorted
-Speed more than adequate for convoy defense.
-Main battery gun arrangement A-Xs-Y
-Secondaries in traditional casemates, with an additional 100mm on each end in a deck mounting with weather shields. Aft deck 100mm raised over 65mm mounts.
-65mm anti-airship guns mounted aft in a trianguar arrangement, two on deck level abeam and ahead of X turret, third mounted ahead of and above X turret. All with splinter shields.
Odin, Escort Kreuzer laid down 1917 (Engine 1916)
Displacement:
5,153 t light; 5,504 t standard; 6,031 t normal; 6,453 t full load
Dimensions: Length overall / water x beam x draught
383.86 ft / 377.30 ft x 57.41 ft x 16.24 ft (normal load)
117.00 m / 115.00 m x 17.50 m x 4.95 m
Armament:
6 - 9.21" / 234 mm guns (3x2 guns), 390.95lbs / 177.33kg shells, 1917 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft
6 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1917 Model
Quick firing guns in casemate mounts
on side, evenly spread
4 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1917 Model
Quick firing guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
3 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1917 Model
Anti-aircraft guns in deck mounts
on side, all aft, 1 raised mount
4 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1917 Model
Machine guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 2,676 lbs / 1,214 kg
Shells per gun, main battery: 150
4 - 21.0" / 533 mm above water torpedoes, 1 - 21.0" / 533 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 213.25 ft / 65.00 m 13.12 ft / 4.00 m
Ends: 0.79" / 20 mm 164.04 ft / 50.00 m 8.20 ft / 2.50 m
Main Belt covers 87 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.72" / 120 mm 2.56" / 65 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm - -
3rd: 0.79" / 20 mm - -
4th: 0.39" / 10 mm - -
- Armour deck: 1.97" / 50 mm, Conning tower: 4.72" / 120 mm
Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 3 shafts, 15,000 shp / 11,190 Kw = 20.95 kts
Range 10,000nm at 10.00 kts (Bunkerage = 949 tons (25% coal))
Complement:
341 - 444
Cost:
£0.984 million / $3.937 million
Distribution of weights at normal displacement:
Armament: 334 tons, 5.5 %
Armour: 1,573 tons, 26.1 %
- Belts: 635 tons, 10.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 327 tons, 5.4 %
- Armour Deck: 577 tons, 9.6 %
- Conning Tower: 34 tons, 0.6 %
Machinery: 572 tons, 9.5 %
Hull, fittings & equipment: 2,424 tons, 40.2 %
Fuel, ammunition & stores: 878 tons, 14.6 %
Miscellaneous weights: 250 tons, 4.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,829 lbs / 4,005 Kg = 22.6 x 9.2 " / 234 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.7 ft / 0.8 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.32
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.600
Length to Beam Ratio: 6.57 : 1
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): -5.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (5 %): 19.69 ft / 6.00 m
- Mid (50 %): 19.69 ft / 6.00 m (12.30 ft / 3.75 m aft of break)
- Quarterdeck (15 %): 12.30 ft / 3.75 m
- Stern: 12.30 ft / 3.75 m
- Average freeboard: 16.06 ft / 4.90 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.2 %
- Above water (accommodation/working, high = better): 127.1 %
Waterplane Area: 15,843 Square feet or 1,472 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 106 lbs/sq ft or 516 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.12
- 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