QuoteUSS Brooklyn, United states Cruiser laid down 1934
Displacement:
9,792 t light; 10,263 t standard; 11,700 t normal; 12,849 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(607.74 ft / 600.00 ft) x 61.60 ft x (21.47 / 23.04 ft)
(185.24 m / 182.88 m) x 18.78 m x (6.54 / 7.02 m)
Armament:
15 - 6.00" / 152 mm 47.0 cal guns - 112.35lbs / 50.96kg shells, 200 per gun
Quick firing guns in turret on barbette mounts, 1934 Model
5 x Triple mounts on centreline ends, majority forward
2 raised mounts - superfiring
8 - 5.00" / 127 mm 25.0 cal guns - 53.99lbs / 24.49kg shells, 200 per gun
Anti-air guns in deck mounts, 1934 Model
4 x Single mounts on sides, forward deck aft
8 - 0.50" / 12.7 mm 90.0 cal guns - 0.07lbs / 0.03kg shells, 5,000 per gun
Breech loading guns in deck mounts, 1934 Model
8 x Single mounts on sides, evenly spread
8 raised mounts
Weight of broadside 2,118 lbs / 961 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.87" / 124 mm 390.00 ft / 118.87 m 9.50 ft / 2.90 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.50" / 165 mm 2.00" / 51 mm 5.50" / 140 mm
2nd: 0.13" / 3 mm 0.13" / 3 mm -
3rd: 0.13" / 3 mm - -
- Armoured deck - single deck:
For and Aft decks: 2.21" / 56 mm
Forecastle: 1.50" / 38 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 5.00" / 127 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 95,697 shp / 71,390 Kw = 32.82 kts
Range 5,350nm at 20.00 kts
Bunker at max displacement = 2,586 tons
Complement:
562 - 731
Cost:
£4.452 million / $17.806 million
Distribution of weights at normal displacement:
Armament: 447 tons, 3.8 %
- Guns: 447 tons, 3.8 %
Armour: 2,407 tons, 20.6 %
- Belts: 744 tons, 6.4 %
- Armament: 591 tons, 5.1 %
- Armour Deck: 1,017 tons, 8.7 %
- Conning Tower: 56 tons, 0.5 %
Machinery: 2,753 tons, 23.5 %
Hull, fittings & equipment: 4,000 tons, 34.2 %
Fuel, ammunition & stores: 1,908 tons, 16.3 %
Miscellaneous weights: 185 tons, 1.6 %
- On freeboard deck: 115 tons
- Above deck: 70 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,659 lbs / 6,649 Kg = 135.7 x 6.0 " / 152 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.1 ft / 0.9 m
Roll period: 14.7 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.22
Hull form characteristics:
Hull has a flush deck,
a straight bulbous bow and small transom stern
Block coefficient (normal/deep): 0.516 / 0.528
Length to Beam Ratio: 9.74 : 1
'Natural speed' for length: 26.28 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 16.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 27.00 ft / 8.23 m, 24.50 ft / 7.47 m
- Forward deck: 40.00 %, 24.50 ft / 7.47 m, 22.00 ft / 6.71 m
- Aft deck: 25.00 %, 22.00 ft / 6.71 m, 20.53 ft / 6.26 m
- Quarter deck: 15.00 %, 20.53 ft / 6.26 m, 20.53 ft / 6.26 m
- Average freeboard: 22.80 ft / 6.95 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.8 %
- Above water (accommodation/working, high = better): 195.1 %
Waterplane Area: 25,596 Square feet or 2,378 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 98 lbs/sq ft or 478 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.84
- Longitudinal: 1.62
- Overall: 0.90
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily
misc
45t FC
25t LR radio
5t paravanes
80t 4x floatplanes
10t - 2x Catapults
20t - hanger in stern
QuoteUSS Baltimore, USA Heavy Cruiser laid down 1941
Displacement:
14,391 t light; 15,291 t standard; 16,942 t normal; 18,263 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(674.32 ft / 664.00 ft) x 70.81 ft x (24.02 / 25.43 ft)
(205.53 m / 202.39 m) x 21.58 m x (7.32 / 7.75 m)
Armament:
9 - 8.00" / 203 mm 55.0 cal guns - 334.99lbs / 151.95kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1941 Model
3 x 3-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
12 - 5.00" / 127 mm 38.0 cal guns - 55.12lbs / 25.00kg shells, 500 per gun
Dual purpose guns in deck and hoist mounts, 1941 Model
4 x 2-gun mounts on side ends, evenly spread
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
48 - 1.57" / 40.0 mm 56.3 cal guns - 2.05lbs / 0.93kg shells, 2,000 per gun
Anti-air guns in deck mounts, 1941 Model
12 x Quad mounts on sides, evenly spread
6 raised mounts
28 - 0.79" / 20.0 mm 70.0 cal guns - 0.26lbs / 0.12kg shells, 4,000 per gun
Breech loading guns in deck mounts, 1941 Model
28 x Single mounts on sides, evenly spread
28 raised mounts
Weight of broadside 3,782 lbs / 1,716 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.25" / 133 mm 431.60 ft / 131.55 m 10.50 ft / 3.20 m
Ends: 2.50" / 64 mm 232.38 ft / 70.83 m 10.50 ft / 3.20 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 3.00" / 76 mm 6.30" / 160 mm
2nd: 1.00" / 25 mm 0.75" / 19 mm 0.75" / 19 mm
3rd: 0.13" / 3 mm - -
4th: 0.13" / 3 mm - -
- Armoured deck - single deck:
For and Aft decks: 3.30" / 84 mm
Forecastle: 2.50" / 64 mm Quarter deck: 2.50" / 64 mm
- Conning towers: Forward 6.50" / 165 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 120,009 shp / 89,526 Kw = 33.06 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,972 tons
Complement:
742 - 965
Cost:
£8.033 million / $32.134 million
Distribution of weights at normal displacement:
Armament: 1,055 tons, 6.2 %
- Guns: 1,055 tons, 6.2 %
Armour: 3,888 tons, 22.9 %
- Belts: 1,211 tons, 7.1 %
- Armament: 655 tons, 3.9 %
- Armour Deck: 1,930 tons, 11.4 %
- Conning Tower: 92 tons, 0.5 %
Machinery: 3,171 tons, 18.7 %
Hull, fittings & equipment: 5,933 tons, 35.0 %
Fuel, ammunition & stores: 2,551 tons, 15.1 %
Miscellaneous weights: 343 tons, 2.0 %
- On freeboard deck: 95 tons
- Above deck: 248 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,567 lbs / 10,690 Kg = 92.1 x 8.0 " / 203 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.6 ft / 1.1 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has a flush deck,
a straight bulbous bow and small transom stern
Block coefficient (normal/deep): 0.525 / 0.535
Length to Beam Ratio: 9.38 : 1
'Natural speed' for length: 27.68 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 16.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.00 ft / 8.84 m, 25.00 ft / 7.62 m
- Forward deck: 30.00 %, 25.00 ft / 7.62 m, 21.00 ft / 6.40 m
- Aft deck: 35.00 %, 21.00 ft / 6.40 m, 19.00 ft / 5.79 m
- Quarter deck: 15.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m
- Average freeboard: 22.07 ft / 6.73 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82.2 %
- Above water (accommodation/working, high = better): 180.3 %
Waterplane Area: 32,836 Square feet or 3,051 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 129 lbs/sq ft or 631 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.36
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Displacements in US Cruisers is confusing, I think because the summary table combines data from different vessels in the series.
Full load is given as 17031, which likely lines up with the "Normal" of 16942.
Standard is listed but specified as 1/2 stores and 5gal water per man, which is not the Standard of the treaty.
There is a Light ship of 12576-13040.
I dunno- Length, beam, draft, BC, range are all right. #shells/gun come from Navweaps.
Freeboard is calculated from "hull depth" listed.
With Small Transom, 120,000shp yields the 33 knot speed typically cited.
Design speed was 34 knots, but trial speed was 33 knots.
trial was 133,649 for 33knots
design was 120,000 for 33.5 knots
CA29 made 32.85knts at 118536ihp at 16570tons
Pittsburgh did 33knts at 16200,
original trial disp 15800-15900
US cruisers gives 10,000/15 as design, and 7900/15 as service.
Armor :
Belt
The belt is very hard to figure out.
The earlier USN cruiser belts were 9.5ft high ...I think.
I believe they were deepened, but I can't find to what.
Based on beam, this defaults to 10.1 feet.
Aslo this one tapered from 6" to 3"
Further, the USN took to using thinner belts abreast the magazine, but
backed by what seems to be a magazine box.
So I am going to model this as 10.5 feet high,
with the last 2 feet tapering down from 6" to 3" adjacent to machinery
and the last 2 feet tapering down from 3" to 2" adjacent to magazines
all of which makes 4 belt sections.
And with the belt over magazines and that over machinery seperate.
91.14 feet for Magazine Belt
340.46 feet for Machinery Belt
150t 91.14ft x 8.5' @ 3"
29t 91.14ft x 2' @ 3->2"
686 304.46 x 8.5' @ 6"
121 304.46 x 2' @ 6->3"
-----
986t
= average thickness 5.25"
Deck
1531t 2.5" Deck
295t 2.5" box over magazines
100t 1" floor under magazines (from US cruisers)
-------
1926
Weight Budgeted : 1930t
Miscellaneous Weight
AD
98t Fire Control
25t LR Radio
125t 5 Radars
OD
5t Paravanes
80t 4x Scout floatplanes, stern hanger
10t 2x Stern CATs
Quote from: TacCovert4 on May 11, 2024, 09:30:19 PMMaybe Small Transom on ships under 10,000t is a 1933 or 34 tech, and Large Transom for Ships under 3001 tons is a 1936 or 38 tech?
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