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Quoted
Originally posted by Brockpaine
Whoa, now you've got a lot more ammo than you'd probably need.
Thank you for the guidance and the basic rule of thumb. Reducing the armament outfit had a significant result on the overall design, which seems to come out much stronger now.
Project 10 Rev A, TBD Light Cruiser laid down 1935
Displacement:
7,952 t light; 8,249 t standard; 8,706 t normal; 9,071 t full load
Dimensions: Length overall / water x beam x draught
583.51 ft / 564.25 ft x 57.25 ft x 17.50 ft (normal load)
177.85 m / 171.98 m x 17.45 m x 5.33 m
Armament:
9 - 6.00" / 152 mm guns (3x3 guns), 108.00lbs / 48.99kg shells, 1935 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 3.54" / 90.0 mm guns (4x2 guns), 22.24lbs / 10.09kg shells, 1935 Model
Quick firing guns in turrets (on barbettes)
on side ends, evenly spread
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.88kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,168 lbs / 530 kg
Shells per gun, main battery: 180
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 370.00 ft / 112.78 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 101 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 4.00" / 102 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 0.25" / 6 mm - -
- Armour deck: 1.50" / 38 mm, Conning tower: 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 70,206 shp / 52,374 Kw = 32.00 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 822 tons
Complement:
449 - 585
Cost:
£3.463 million / $13.852 million
Distribution of weights at normal displacement:
Armament: 146 tons, 1.7 %
Armour: 1,445 tons, 16.6 %
- Belts: 494 tons, 5.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 270 tons, 3.1 %
- Armour Deck: 644 tons, 7.4 %
- Conning Tower: 36 tons, 0.4 %
Machinery: 1,994 tons, 22.9 %
Hull, fittings & equipment: 4,167 tons, 47.9 %
Fuel, ammunition & stores: 754 tons, 8.7 %
Miscellaneous weights: 200 tons, 2.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,502 lbs / 6,124 Kg = 125.0 x 6.0 " / 152 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.6 ft / 0.8 m
Roll period: 14.9 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.27
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.539
Length to Beam Ratio: 9.86 : 1
'Natural speed' for length: 27.02 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 9.00 ft / 2.74 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (49 %): 22.00 ft / 6.71 m
- Mid (0 %): 22.00 ft / 6.71 m
- Quarterdeck (49 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 22.00 ft / 6.71 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.6 %
- Above water (accommodation/working, high = better): 198.3 %
Waterplane Area: 23,224 Square feet or 2,158 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 108 lbs/sq ft or 530 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.06
- Longitudinal: 2.13
- Overall: 1.13
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
200 tons miscellaneous weight reserved for torpedo tube reloads, aircraft and handling gear, and/or RDF.
Quoted
Originally posted by BruceDuncan
8 - 3.54" / 90.0 mm guns (4x2 guns), 22.24lbs / 10.09kg shells, 1935 Model
Quick firing guns in turrets (on barbettes)
on side ends, evenly spread
Quoted
Originally posted by Hrolf Hakonson
I agree with Brock on the 90mms, make them AA guns in mount & hoist mountings. The 6" guns should probably be breech loaders, since the French 6" gun was separate loading (not that this makes any difference to SS, mind).
Quoted
Originally posted by Brockpaine
I'd say that's looking pretty good, all things considered. You still have a bit of hull strength you can use - if it were me, I'd add either more range, or more deck armor. At the moment, range could stand to be increased more.
One thing I note: the freeboard is set at 22 feet across the entire length of the hull. Most ships have a somewhat higher bow and a lower midships, with the height of the stern varying according to national design preferences. It might be a bit more regular to add the sheer to the hull (perhaps by raising the freeboard 2' or so at the stem, and lowering it 2-4' at the midships areas). Springsharp 3 is really helpful for providing a graphic of how the hull looks with a specific freeboard. I don't spend a great deal of effort on it, but I do try to sim an eye-pleasing curve to the ship's lines. But that's just me.
Quoted
Originally posted by BruceDuncan
but I think I will fall back on your earlier suggestion and study some of the 'best' SS sims in the Encyclopedia to get a better feel on where the hull should break.
Quoted
Originally posted by HoOmAn
Quoted
Originally posted by BruceDuncan
but I think I will fall back on your earlier suggestion and study some of the 'best' SS sims in the Encyclopedia to get a better feel on where the hull should break.
Now, that is interesting. Please let me know hwn you have found a way to define "best" in general. To me it was a matter of available resources, planning, doctrine and fleet´s needs all the time.... ;o)
Quoted
Originally posted by HoOmAn
Quoted
Originally posted by BruceDuncan
but I think I will fall back on your earlier suggestion and study some of the 'best' SS sims in the Encyclopedia to get a better feel on where the hull should break.
Now, that is interesting. Please let me know how you have found a way to define "best" in general. To me it was a matter of available resources, planning, doctrine and fleet´s needs all the time.... ;o)
Quoted
Originally posted by Brockpaine
One thing I note: the freeboard is set at 22 feet across the entire length of the hull. Most ships have a somewhat higher bow and a lower midships, with the height of the stern varying according to national design preferences. It might be a bit more regular to add the sheer to the hull (perhaps by raising the freeboard 2' or so at the stem, and lowering it 2-4' at the midships areas). Springsharp 3 is really helpful for providing a graphic of how the hull looks with a specific freeboard. I don't spend a great deal of effort on it, but I do try to sim an eye-pleasing curve to the ship's lines. But that's just me.
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