1913 CSA Torpedo Ram studies

Started by Guinness, August 07, 2008, 07:01:12 PM

Previous topic - Next topic
Print
Go Down Pages1
User actions

Guinness

August 07, 2008, 07:01:12 PM Last Edit: August 07, 2008, 08:03:34 PM by guinness
Torpedo boats and their progeny are just about the most difficult springsharp challenge for a novice (at least in my opinion). I've literally been slaving over these for a month.

At any rate, here are 3 study designs for a possible new standard CSA destroyer, 2 1000t designs with different main gun calibers, and one larger 1500t leader design (which of course I'd need to first attain the next destroyer tech to build).

I'm keen for some feedback on these, as I still feel completely at sea when designing these sorts of ships.

CSA 1913 Torpedo Ram, CSA Torpedo Ram laid down 1913 (Engine 1912)

Displacement:
   1,000 t light; 1,036 t standard; 1,216 t normal; 1,359 t full load

Dimensions: Length overall / water x beam x draught
   354.00 ft / 342.00 ft x 28.00 ft x 11.00 ft (normal load)
   107.90 m / 104.24 m x 8.53 m  x 3.35 m

Armament:
      4 - 4.00" / 102 mm guns in single mounts, 25.00lbs / 11.34kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 1.00" / 25.4 mm guns (3 mounts), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on side, all forward, all raised mounts - superfiring
      2 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on centreline, all aft, all raised mounts - superfiring
   Weight of broadside 103 lbs / 47 kg
   Shells per gun, main battery: 200
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 25,000 shp / 18,650 Kw = 31.41 kts
   Range 5,335nm at 12.00 kts
   Bunker at max displacement = 323 tons

Complement:
   102 - 133

Cost:
   £0.152 million / $0.606 million

Distribution of weights at normal displacement:
   Armament: 16 tons, 1.3 %
   Armour: 9 tons, 0.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 9 tons, 0.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 644 tons, 53.0 %
   Hull, fittings & equipment: 299 tons, 24.6 %
   Fuel, ammunition & stores: 215 tons, 17.7 %
   Miscellaneous weights: 31 tons, 2.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     295 lbs / 134 Kg = 9.2 x 4.0 " / 102 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.43
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.14
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.404
   Length to Beam Ratio: 12.21 : 1
   'Natural speed' for length: 18.49 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 36.86 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (43 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (15 %):   8.00 ft / 2.44 m
      - Stern:      8.00 ft / 2.44 m
      - Average freeboard:   11.44 ft / 3.49 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 184.1 %
      - Above water (accommodation/working, high = better): 75.2 %
   Waterplane Area: 5,908 Square feet or 549 Square metres
   Displacement factor (Displacement / loading): 56 %
   Structure weight / hull surface area: 26 lbs/sq ft or 127 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.11
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

Misc Weights:
25 tons: Fire control
6 tons: Torpedos

Range at top speed: 13.43 hours, 422 nm

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

CSA 1913 Torpedo Ram 4.75 inch guns, CSA Torpedo Ram laid down 1913 (Engine 1912)

Displacement:
   1,000 t light; 1,040 t standard; 1,214 t normal; 1,354 t full load

Dimensions: Length overall / water x beam x draught
   354.00 ft / 342.00 ft x 28.00 ft x 10.99 ft (normal load)
   107.90 m / 104.24 m x 8.53 m  x 3.35 m

Armament:
      3 - 4.75" / 121 mm guns in single mounts, 50.00lbs / 22.68kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline ends, majority aft, 1 raised mount aft
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on centreline, all forward, all raised mounts - superfiring
      2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mount
     on centreline aft, all raised guns - superfiring
   Weight of broadside 153 lbs / 69 kg
   Shells per gun, main battery: 190
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 25,000 shp / 18,650 Kw = 31.42 kts
   Range 5,175nm at 12.00 kts
   Bunker at max displacement = 313 tons

Complement:
   102 - 133

Cost:
   £0.154 million / $0.616 million

Distribution of weights at normal displacement:
   Armament: 20 tons, 1.7 %
   Armour: 9 tons, 0.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 9 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 636 tons, 52.4 %
   Hull, fittings & equipment: 303 tons, 25.0 %
   Fuel, ammunition & stores: 215 tons, 17.7 %
   Miscellaneous weights: 31 tons, 2.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     291 lbs / 132 Kg = 5.4 x 4.8 " / 121 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.42
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.404
   Length to Beam Ratio: 12.21 : 1
   'Natural speed' for length: 18.49 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 36.86 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (43 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (15 %):   8.00 ft / 2.44 m
      - Stern:      8.00 ft / 2.44 m
      - Average freeboard:   11.44 ft / 3.49 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 185.0 %
      - Above water (accommodation/working, high = better): 75.2 %
   Waterplane Area: 5,908 Square feet or 549 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 26 lbs/sq ft or 129 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.12
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

Misc Weights:
25 tons: Fire control
6 tons: Torpedos

Range at top speed: 13.05 hours, 410 nm

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

CSA 1913 Large Torpedo Ram, CSA Torpedo Ram laid down 1913 (Engine 1912)

Displacement:
   1,500 t light; 1,562 t standard; 1,829 t normal; 2,042 t full load

Dimensions: Length overall / water x beam x draught
   407.26 ft / 394.00 ft x 33.00 ft x 12.00 ft (normal load)
   124.13 m / 120.09 m x 10.06 m  x 3.66 m

Armament:
      4 - 4.75" / 121 mm guns in single mounts, 50.00lbs / 22.68kg shells, 1913 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 1.00" / 25.4 mm guns (4x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Breech loading guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
   Weight of broadside 204 lbs / 93 kg
   Shells per gun, main battery: 220
   8 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 33,000 shp / 24,618 Kw = 32.06 kts
   Range 6,197nm at 12.00 kts
   Bunker at max displacement = 480 tons

Complement:
   139 - 181

Cost:
   £0.232 million / $0.926 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 1.5 %
   Armour: 13 tons, 0.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 13 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 978 tons, 53.5 %
   Hull, fittings & equipment: 425 tons, 23.2 %
   Fuel, ammunition & stores: 329 tons, 18.0 %
   Miscellaneous weights: 57 tons, 3.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     419 lbs / 190 Kg = 7.8 x 4.8 " / 121 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.52
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 10.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.410
   Length to Beam Ratio: 11.94 : 1
   'Natural speed' for length: 19.85 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 36.38 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.00 ft / 5.49 m
      - Forecastle (18 %):   17.00 ft / 5.18 m
      - Mid (36 %):      17.00 ft / 5.18 m (10.00 ft / 3.05 m aft of break)
      - Quarterdeck (18 %):   10.00 ft / 3.05 m
      - Stern:      10.00 ft / 3.05 m
      - Average freeboard:   12.59 ft / 3.84 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 187.7 %
      - Above water (accommodation/working, high = better): 81.3 %
   Waterplane Area: 8,053 Square feet or 748 Square metres
   Displacement factor (Displacement / loading): 63 %
   Structure weight / hull surface area: 29 lbs/sq ft or 142 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.88
      - Overall: 0.52
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

Misc Weights:
25 tons: Fire control
10 tons: Wireless
8 tons: Torpedos
14 tons: Captain(D) facilities

Range at max speed: 485 nm or 15.1 hours


EDIT: * fixed large study so range at cruising speed appears.

Sachmle

#1
August 07, 2008, 09:45:53 PM
QuoteCSA 1913 Torpedo Ram, CSA Torpedo Ram laid down 1913 (Engine 1912)

Armament:
      4 - 4.00" / 102 mm guns in single mounts, 25.00lbs / 11.34kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 1.00" / 25.4 mm guns (3 mounts), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on side, all forward, all raised mounts - superfiring
      2 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on centreline, all aft, all raised mounts - superfiring

1. Why are your 4" rounds so light? SS default is 32lbs and your 4.75" is 50lbs. Double the weight only .75" bigger shell?

2. Did you mean 4x2?

3. Did you mean 1x2?

Other than that, not bad. On the 1500t version, what's the torpedo layout?
"All treaties between great states cease to be binding when they come in conflict with the struggle for existence."
Otto von Bismarck

"Give me a woman who loves beer and I will conquer the world."
Kaiser Wilhelm

"If stupidity were painfull I would be deaf from all the screaming." Sam A. Grim

Borys

#2
August 08, 2008, 02:23:22 AM
I like the first one.
Purrfection.
I agree on shell weights.
Too light.
A 25 pounder is 3,5"/88-90mm calibre.
A 4 incher should be c.35 lbs.
The 50 pounds for the 4,8" gun is also on the light side.
But the shell weight is good - I'm personally considering development of a 50 pounder in 4,5" calibre for the KKK.

Borys
NEDS - Not Enough Deck Space for all those guns and torpedos;
Bambi must DIE!

Guinness

#3
August 08, 2008, 06:07:34 AM Last Edit: August 08, 2008, 06:09:21 AM by guinness
I think you guys are right about the 4". It should be 35lbs. I was banging stuff into SS from memory, and haven't got all of Carthaginian's shell weights right in my head.

The 4.75" though I'm pretty sure is a 75 pounder. I'll look it up again though.

The torpedos on the 1500 tonner would be 2x4, which I recognize as setting a trend. I suppose they could be 2x3, 1x2, or even 4x2 if someone thinks that 2x4 presents some sort of problem in the nverse. I might have a NEDS problem in those cases though.

The 1" mgs, like on all my SS designs, are perpetually screwed up. The smaller designs should have 3 twin mounts, with one on the centerline aft, the 1500 tonner should have 4 twin mounts.

Sachmle

#4
August 08, 2008, 06:33:33 AM
Quote from: guinness on August 08, 2008, 06:07:34 AM
The torpedos on the 1500 tonner would be 2x4, which I recognize as setting a trend.

Actually, it's in the DD tech. It's just not available until
Quote1918: quad TTs, 2000t
"All treaties between great states cease to be binding when they come in conflict with the struggle for existence."
Otto von Bismarck

"Give me a woman who loves beer and I will conquer the world."
Kaiser Wilhelm

"If stupidity were painfull I would be deaf from all the screaming." Sam A. Grim

The Rock Doctor

#5
August 08, 2008, 06:44:10 AM
The length to beam ratio of these ships is extremely high...

Borys

#6
August 08, 2008, 09:07:19 AM
A 4,75" gun should be c. 60 lbs.
IMO 75 lbs is 5-5,2" calibre.

But maybe there were some very heavy 120/122mm shells out there ...
Borys


NEDS - Not Enough Deck Space for all those guns and torpedos;
Bambi must DIE!

Guinness

#7
August 08, 2008, 09:34:29 AM
From the CSA 2/1910 report:

4.75"/50 caliber 50-pounder $0.25   4rd half (note: identical functionally to RN 4.72")

So the 4.75" is a 50 pounder. Carthaginian was right about it being functionally equivalent to an RN 4.72" gun too. The 4.72"L45 Mark IX carried on interwar RN destroyers fired a 50lb shell.

Maybe the CSA just calls it a 4.75" gun, when it's really a straight 120mm?

As far as L/B and other issues: I'm going to take another crack at these this weekend, while I'm cooling my heals at my inlaw's. I'll keep it at triple tubes and under.

Borys

#8
August 08, 2008, 09:49:00 AM
Ahoj!
50 lbs for 12cm shell is OK.

Borys
NEDS - Not Enough Deck Space for all those guns and torpedos;
Bambi must DIE!

P3D

#9
August 08, 2008, 11:34:05 AM
IIRC consensus said 1:12. BTW,

Minekaze 1:11.58
Kamikaze 1:12.21
The first purpose of a warship is to remain afloat. Anon.
Below 40 degrees, there is no law. Below 50 degrees, there is no God. sailor's maxim on weather in the Southern seas

Guinness

#10
August 08, 2008, 08:06:27 PM Last Edit: August 08, 2008, 08:26:11 PM by guinness
Ok, here are the two 1000t designs, redrafted to keep their l/b ratios below 12:1.

I actually like these a little better too. They give up a very little amount of speed, but gain fighting power. I was even able to cram a marconi into the 4" gunned design.

BTW: Carthaginian did indeed use a 25lb shell with his 4" gun, but for this study, I used a 30lb shell. I suppose if I ever put it in production, I'll be introducing a new shell too.

CSA 1913 Torpedo Ram, CSA Torpedo Ram laid down 1913 (Engine 1912)

Displacement:
   1,000 t light; 1,041 t standard; 1,212 t normal; 1,348 t full load

Dimensions: Length overall / water x beam x draught
   346.00 ft / 334.00 ft x 28.00 ft x 11.28 ft (normal load)
   105.46 m / 101.80 m x 8.53 m  x 3.44 m

Armament:
      3 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline ends, majority aft, 1 raised mount aft
      2 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, all forward
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on side, all aft, all raised mounts - superfiring
      2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mount
     on centreline forward, all raised guns - superfiring
   Weight of broadside 153 lbs / 69 kg
   Shells per gun, main battery: 183
   5 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,000 shp / 17,904 Kw = 31.01 kts
   Range 5,080nm at 12.00 kts
   Bunker at max displacement = 307 tons

Complement:
   102 - 133

Cost:
   £0.152 million / $0.609 million

Distribution of weights at normal displacement:
   Armament: 20 tons, 1.7 %
   Armour: 11 tons, 0.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 11 tons, 0.9 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 624 tons, 51.5 %
   Hull, fittings & equipment: 302 tons, 24.9 %
   Fuel, ammunition & stores: 212 tons, 17.5 %
   Miscellaneous weights: 42 tons, 3.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     299 lbs / 136 Kg = 9.3 x 4.0 " / 102 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.42
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.402
   Length to Beam Ratio: 11.93 : 1
   'Natural speed' for length: 18.28 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 36.86 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (45 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (15 %):   8.00 ft / 2.44 m
      - Stern:      8.00 ft / 2.44 m
      - Average freeboard:   11.60 ft / 3.54 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.2 %
      - Above water (accommodation/working, high = better): 81.9 %
   Waterplane Area: 5,763 Square feet or 535 Square metres
   Displacement factor (Displacement / loading): 57 %
   Structure weight / hull surface area: 26 lbs/sq ft or 129 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.25
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

Misc Weights:
25 tons: Fire control
6 tons: Torpedos
10 tons: Marconi
1 ton: reserve

Range at top speed: 13.2 hours, 410 nm

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


CSA 1913 Torpedo Ram, CSA Torpedo Ram laid down 1913 (Engine 1912)

Displacement:
   1,000 t light; 1,044 t standard; 1,214 t normal; 1,350 t full load

Dimensions: Length overall / water x beam x draught
   346.00 ft / 334.00 ft x 28.00 ft x 11.30 ft (normal load)
   105.46 m / 101.80 m x 8.53 m  x 3.44 m

Armament:
      4 - 4.75" / 121 mm guns in single mounts, 50.00lbs / 22.68kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on side, all forward, all raised mounts - superfiring
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
     Machine guns in deck mounts
     on side, all aft, all raised mounts - superfiring
   Weight of broadside 204 lbs / 93 kg
   Shells per gun, main battery: 168
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   3rd:   1.00" / 25 mm         -               -
   4th:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,000 shp / 17,904 Kw = 31.00 kts
   Range 5,053nm at 12.00 kts
   Bunker at max displacement = 306 tons

Complement:
   102 - 133

Cost:
   £0.157 million / $0.628 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 2.2 %
   Armour: 12 tons, 1.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 12 tons, 1.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 614 tons, 50.6 %
   Hull, fittings & equipment: 310 tons, 25.6 %
   Fuel, ammunition & stores: 214 tons, 17.6 %
   Miscellaneous weights: 37 tons, 3.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     293 lbs / 133 Kg = 5.5 x 4.8 " / 121 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.31
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.402
   Length to Beam Ratio: 11.93 : 1
   'Natural speed' for length: 18.28 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 36.86 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (45 %):      16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
      - Quarterdeck (15 %):   8.00 ft / 2.44 m
      - Stern:      8.00 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): 183.8 %
      - Above water (accommodation/working, high = better): 73.8 %
   Waterplane Area: 5,763 Square feet or 535 Square metres
   Displacement factor (Displacement / loading): 56 %
   Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.27
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

Misc Weights:
25 tons: Fire control
6 tons: Torpedos
6 tons: Reserve

Range at top speed: 13.2 hours, 410 nm
Print
Go Up Pages1
User actions