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21

Sunday, June 23rd 2013, 7:20am

Bit more lengthy reply to Bruce.

Quoted

While the ship's stability is very good, her seaboat quality is barely above average; I personally would try increase the latter at the expense of the former, if that were possible. The design's steadiness as a gun platform would worry me; with a 'lively ship', maintaining good gunnery could be difficult. Again, it's preferences.

This design is a direct evolution of a older DD class. The constraint is that it has to fit in a class 1 facility, so some features are compromised to meet the goal. Making the hull longer would help, but it would really limit the number of hulls that could be constructed at once.

Quoted

I am surprised that the 152mm mounts are in turrets with barbettes as opposed to mounts and hoists. Would you not save some tonnage here with the latter?

What you ask is true, but given the guns DP nature in a twin mounting, I feel that a T&B a)gives the mount the necessary loading provisions for a sustainable high RoF b)gives the mount the necessary power and stabilization equipment to be an effective part of the anti aircraft defenses and c)more accurately represents the amount of weight that such a mounting would take up.

Quoted

I would be very worried with the seaboat quality specified, and the steadiness as a gun platform. While below the threshold, the recoil effect at 0.68 seems very high.

Figures are similar to the previous class, and are tied more to that class then the modifications made.
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

22

Sunday, June 23rd 2013, 11:32am

The high cruising speed has always been an Italian aim. It offers high transit speeds around the Med and the Italian coastline, and as Brock points out more then enough for oceanic work from the Caribbean and Horn of Africa. Also if Italy lacks in tankers it probably is a good move.

23

Wednesday, June 26th 2013, 8:08am

A refit of the Sant' Achilleo and San Bacco. The highlights.

Cost: 3965.5 tons per ship
Time: 8.4655 months per ship (Just under three Quarters)
Modifications: Refurbishment of the main battery to 152mm DP guns. Replacement of the secondary battery with 76mm automatics. Updated light AA armament. Removal of torpedo tubes. Increase in speed to 32.44knts on 84,000SHP. New bow for higher speed. General life extension refit or replacement of critical structures. Addition of electronic sensors and other miscellaneous equipment.

Saint Class (Refit), Italian Cruiser laid down 1928 (Engine 1942)

Displacement:
7,931 t light; 8,392 t standard; 9,374 t normal; 10,160 t full load

Dimensions: Length overall / water x beam x draught
610.88 ft / 590.55 ft x 60.70 ft x 20.34 ft (normal load)
186.20 m / 180.00 m x 18.50 m x 6.20 m

Armament:
8 - 5.98" / 152 mm guns (4x2 guns), 99.21lbs / 45.00kg shells, 1942 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
20 - 2.99" / 76.0 mm guns (10x2 guns), 14.86lbs / 6.74kg shells, 1942 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (4x3 guns), 1.55lbs / 0.70kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
12 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,115 lbs / 506 kg
Shells per gun, main battery: 400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 393.70 ft / 120.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 103 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.31" / 135 mm 2.76" / 70 mm 3.94" / 100 mm

- Armour deck: 1.57" / 40 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 84,000 shp / 62,664 Kw = 32.44 kts
Range 4,500nm at 20.00 kts
Bunker at max displacement = 1,767 tons

Complement:
476 - 619

Cost:
£2.715 million / $10.860 million

Distribution of weights at normal displacement:
Armament: 150 tons, 1.6 %
Armour: 1,777 tons, 19.0 %
- Belts: 759 tons, 8.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 295 tons, 3.2 %
- Armour Deck: 666 tons, 7.1 %
- Conning Tower: 57 tons, 0.6 %
Machinery: 2,194 tons, 23.4 %
Hull, fittings & equipment: 3,484 tons, 37.2 %
Fuel, ammunition & stores: 1,443 tons, 15.4 %
Miscellaneous weights: 325 tons, 3.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,094 lbs / 5,032 Kg = 103.5 x 6.0 " / 152 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 3.1 ft / 0.9 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.450
Length to Beam Ratio: 9.73 : 1
'Natural speed' for length: 24.30 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 22.97 ft / 7.00 m
- Mid (37 %): 22.97 ft / 7.00 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.29 ft / 5.27 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.6 %
- Above water (accommodation/working, high = better): 143.6 %
Waterplane Area: 22,863 Square feet or 2,124 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 98 lbs/sq ft or 477 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.15
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

This post has been edited 1 times, last edit by "snip" (Jun 26th 2013, 8:24am)


24

Tuesday, July 2nd 2013, 9:26am

Genoa Class Cruiser

A updated Lombardia class cruiser. Main changes are to the DP nature of the 152mm guns, thicker deck armor, and replacement of the old 100mm AA guns with modern 76mm automatics.

Genoa, Italian Light Cruiser laid down 1942

Displacement:
9,750 t light; 10,460 t standard; 11,888 t normal; 13,030 t full load

Dimensions: Length overall / water x beam x draught
649.24 ft / 623.36 ft x 65.94 ft x 19.69 ft (normal load)
197.89 m / 190.00 m x 20.10 m x 6.00 m

Armament:
16 - 5.98" / 152 mm guns (4x4 guns), 107.15lbs / 48.60kg shells, 1942 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 2.95" / 75.0 mm guns (4x4 guns), 12.87lbs / 5.84kg shells, 1942 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, 2 raised mounts - superfiring
24 - 1.85" / 47.0 mm guns (6x4 guns), 3.17lbs / 1.44kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
20 - 0.98" / 25.0 mm guns (10x2 guns), 0.48lbs / 0.22kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 2,006 lbs / 910 kg
Shells per gun, main battery: 400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 393.70 ft / 120.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 97 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.31" / 135 mm 2.76" / 70 mm 3.94" / 100 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm -
3rd: 0.39" / 10 mm 0.39" / 10 mm -
4th: 0.39" / 10 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 80,000 shp / 59,680 Kw = 31.88 kts
Range 3,500nm at 25.00 kts
Bunker at max displacement = 2,570 tons

Complement:
569 - 740

Cost:
£5.401 million / $21.605 million

Distribution of weights at normal displacement:
Armament: 256 tons, 2.2 %
Armour: 2,317 tons, 19.5 %
- Belts: 770 tons, 6.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 465 tons, 3.9 %
- Armour Deck: 1,051 tons, 8.8 %
- Conning Tower: 31 tons, 0.3 %
Machinery: 2,090 tons, 17.6 %
Hull, fittings & equipment: 4,887 tons, 41.1 %
Fuel, ammunition & stores: 2,138 tons, 18.0 %
Miscellaneous weights: 200 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,601 lbs / 8,891 Kg = 182.9 x 6.0 " / 152 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.3 ft / 1.0 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.514
Length to Beam Ratio: 9.45 : 1
'Natural speed' for length: 28.57 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.46 ft / 10.20 m
- Forecastle (20 %): 23.62 ft / 7.20 m
- Mid (50 %): 20.34 ft / 6.20 m
- Quarterdeck (15 %): 20.34 ft / 6.20 m
- Stern: 20.34 ft / 6.20 m
- Average freeboard: 22.28 ft / 6.79 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.9 %
- Above water (accommodation/working, high = better): 203.9 %
Waterplane Area: 28,864 Square feet or 2,682 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 111 lbs/sq ft or 540 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.43
- 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

Genoa and Milian layed down 1942
Sicily and Sardinia layed down 1943
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

25

Tuesday, July 2nd 2013, 9:56am

Looks good to me, the Saint's are worthwhile refitting and the new Genoa Class looks a powerful ship. I assume the 4x4 76mm are actually 8x2?

26

Tuesday, July 2nd 2013, 1:14pm

I note some oddities between the Saints and the Genoas.

The former have 76mm secondary guns, while the latter have 75mm secondary guns; I suppose that is a typographical error, but since the Saints have twin mounts specified, and the Genoas quad mounts specified, I wonder if there are two different weapons in play here.

I'd second Hood's question - a quad mount for 75mm automatic guns (or 76mm for that matter) would be a real monster to man and arrange feeds for the ammunition.

Are the Genoas carrying a new 47mm AA gun? I note that the Saints are still left with 37mm guns. A quad mount for a 47mm gun would also take up a lot of space, IMHO.

27

Tuesday, July 2nd 2013, 5:04pm

That is what I get for working on a sim after midnight. Corrected below.

Genoa, Italian Light Cruiser laid down 1942

Displacement:
9,750 t light; 10,426 t standard; 11,850 t normal; 12,989 t full load

Dimensions: Length overall / water x beam x draught
649.24 ft / 623.36 ft x 65.94 ft x 19.69 ft (normal load)
197.89 m / 190.00 m x 20.10 m x 6.00 m

Armament:
16 - 5.98" / 152 mm guns (4x4 guns), 99.21lbs / 45.00kg shells, 1942 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 2.99" / 76.0 mm guns (8x2 guns), 14.26lbs / 6.47kg shells, 1942 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
24 - 1.46" / 37.0 mm guns (6x4 guns), 1.55lbs / 0.70kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
20 - 0.98" / 25.0 mm guns (10x2 guns), 0.48lbs / 0.22kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,862 lbs / 845 kg
Shells per gun, main battery: 400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 393.70 ft / 120.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 97 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.31" / 135 mm 2.76" / 70 mm 3.94" / 100 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm -
3rd: 0.39" / 10 mm 0.39" / 10 mm -
4th: 0.39" / 10 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 80,000 shp / 59,680 Kw = 31.90 kts
Range 3,500nm at 25.00 kts
Bunker at max displacement = 2,563 tons

Complement:
567 - 738

Cost:
£5.382 million / $21.528 million

Distribution of weights at normal displacement:
Armament: 252 tons, 2.1 %
Armour: 2,323 tons, 19.6 %
- Belts: 770 tons, 6.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 473 tons, 4.0 %
- Armour Deck: 1,050 tons, 8.9 %
- Conning Tower: 31 tons, 0.3 %
Machinery: 2,090 tons, 17.6 %
Hull, fittings & equipment: 4,836 tons, 40.8 %
Fuel, ammunition & stores: 2,100 tons, 17.7 %
Miscellaneous weights: 250 tons, 2.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,461 lbs / 8,827 Kg = 181.6 x 6.0 " / 152 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 3.3 ft / 1.0 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.513
Length to Beam Ratio: 9.45 : 1
'Natural speed' for length: 28.58 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.46 ft / 10.20 m
- Forecastle (20 %): 23.62 ft / 7.20 m
- Mid (50 %): 20.34 ft / 6.20 m
- Quarterdeck (15 %): 20.34 ft / 6.20 m
- Stern: 20.34 ft / 6.20 m
- Average freeboard: 22.28 ft / 6.79 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.1 %
- Above water (accommodation/working, high = better): 204.3 %
Waterplane Area: 28,819 Square feet or 2,677 Square metres
Displacement factor (Displacement / loading): 135 %
Structure weight / hull surface area: 110 lbs/sq ft or 535 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- 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
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

28

Tuesday, July 2nd 2013, 5:10pm

Ah. I suspected it was a typo error. No great harm done. :)

Given the number of mounts, I can see why you've suppressed the torpedo tubes on the Genoa design; they look more like anti-aircraft cruisers rather than general purpose screens. Overall not bad.

29

Tuesday, July 2nd 2013, 5:35pm

The Lombaria's also lack torpedo tubes and I have removed the Saint's tubes during there reconstruction. With the speed that some destroyers are capable of and the advent of good long range subs and air dropped torpedo, the cruiser is no longer a very effective delivery platform for the torpedo. Should Italy build any cruisers that are deticated more to commerce warfare, they will most likely include torpedos due to the nature of there mission, where as fleet cruisers like the Genoa will always have destroyers, aircraft and maybe subs backing them up.
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

30

Wednesday, July 3rd 2013, 3:02am

One last ship for the 1942 program, a revisitation of the Large Armored Cruiser. Changes include: Removal of one 305mm turret (it is thought to be better to have spare guns), reconfiguration of the secondary to the combination of 152mm and 76mm guns, and improvements to the armor thickness.

Construction time of approximently 39 months (9.825 quarters) has the ship completing in 1944. In preparation for the intended service in the Indian Ocean, the Class 3 Drydock at Massawa, EAS, will be enlarged to a Class 4 facility in 1943.

Regina Elena, Italian Large Armored Cruiser laid down 1942

Displacement:
30,000 t light; 31,539 t standard; 36,883 t normal; 41,158 t full load

Dimensions: Length overall / water x beam x draught
885.83 ft / 853.02 ft x 88.58 ft (Bulges 91.86 ft) x 31.82 ft (normal load)
270.00 m / 260.00 m x 27.00 m (Bulges 28.00 m) x 9.70 m

Armament:
9 - 12.01" / 305 mm guns (3x3 guns), 996.49lbs / 452.00kg shells, 1909 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 5.98" / 152 mm guns (4x2 guns), 99.21lbs / 45.00kg shells, 1942 Model
Dual purpose guns in turrets (on barbettes)
on side, all amidships
16 - 2.99" / 76.0 mm guns (8x2 guns), 14.26lbs / 6.47kg shells, 1942 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
24 - 1.46" / 37.0 mm guns (6x4 guns), 1.55lbs / 0.70kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
40 - 0.98" / 25.0 mm guns (10x4 guns), 0.48lbs / 0.22kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 10,046 lbs / 4,557 kg
Shells per gun, main battery: 140

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.45" / 240 mm 554.46 ft / 169.00 m 14.76 ft / 4.50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Torpedo Bulkhead and Bulges:
1.57" / 40 mm 554.46 ft / 169.00 m 26.25 ft / 8.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.84" / 250 mm 3.94" / 100 mm 7.87" / 200 mm
2nd: 5.31" / 135 mm 2.76" / 70 mm 3.94" / 100 mm
3rd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
4th: 0.39" / 10 mm 0.39" / 10 mm -
5th: 0.39" / 10 mm - -

- Armour deck: 3.94" / 100 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 200,000 shp / 149,200 Kw = 34.66 kts
Range 7,000nm at 25.00 kts
Bunker at max displacement = 9,619 tons

Complement:
1,329 - 1,729

Cost:
£17.325 million / $69.299 million

Distribution of weights at normal displacement:
Armament: 1,120 tons, 3.0 %
Armour: 9,701 tons, 26.3 %
- Belts: 3,232 tons, 8.8 %
- Torpedo bulkhead: 848 tons, 2.3 %
- Armament: 1,678 tons, 4.6 %
- Armour Deck: 3,877 tons, 10.5 %
- Conning Tower: 66 tons, 0.2 %
Machinery: 5,225 tons, 14.2 %
Hull, fittings & equipment: 13,554 tons, 36.7 %
Fuel, ammunition & stores: 6,883 tons, 18.7 %
Miscellaneous weights: 400 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
52,968 lbs / 24,026 Kg = 61.2 x 12.0 " / 305 mm shells or 7.1 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 5.5 ft / 1.7 m
Roll period: 16.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.518
Length to Beam Ratio: 9.29 : 1
'Natural speed' for length: 33.46 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 11.98 ft / 3.65 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36.09 ft / 11.00 m
- Forecastle (20 %): 24.61 ft / 7.50 m
- Mid (50 %): 21.33 ft / 6.50 m
- Quarterdeck (15 %): 21.33 ft / 6.50 m
- Stern: 21.33 ft / 6.50 m
- Average freeboard: 23.39 ft / 7.13 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.3 %
- Above water (accommodation/working, high = better): 168.5 %
Waterplane Area: 53,232 Square feet or 4,945 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 169 lbs/sq ft or 824 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.12
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

This post has been edited 1 times, last edit by "snip" (Jul 3rd 2013, 3:06am)


31

Monday, July 8th 2013, 4:06am

Balista Class Destroyer

The Venizia's were not intended to be a mass produced design beyond the original ten hulls, as 4 152mm guns is not viewed as having enough guns for respectable AA coverage. This enlarged design adds 20m of length for both a additional 152mm mount, higher speed, and improved handeling abilities

Balista, Italian Destroyer laid down 1943

Displacement:
2,700 t light; 2,889 t standard; 3,322 t normal; 3,669 t full load

Dimensions: Length overall / water x beam x draught
459.31 ft / 447.67 ft x 42.65 ft x 14.76 ft (normal load)
140.00 m / 136.45 m x 13.00 m x 4.50 m

Armament:
5 - 5.98" / 152 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 2 raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.65lbs / 0.75kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
8 - 0.98" / 25.0 mm guns in single mounts, 0.53lbs / 0.24kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 527 lbs / 239 kg
Shells per gun, main battery: 400
8 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 54,000 shp / 40,284 Kw = 34.69 kts
Range 4,000nm at 20.00 kts
Bunker at max displacement = 780 tons

Complement:
218 - 284

Cost:
£2.247 million / $8.989 million

Distribution of weights at normal displacement:
Armament: 71 tons, 2.1 %
Armour: 53 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 40 tons, 1.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 13 tons, 0.4 %
Machinery: 1,354 tons, 40.8 %
Hull, fittings & equipment: 1,002 tons, 30.2 %
Fuel, ammunition & stores: 622 tons, 18.7 %
Miscellaneous weights: 220 tons, 6.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,183 lbs / 537 Kg = 11.0 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.9 ft / 0.6 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.53
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.412
Length to Beam Ratio: 10.50 : 1
'Natural speed' for length: 24.33 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 19.69 ft / 6.00 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: 17.81 ft / 5.43 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 157.6 %
- Above water (accommodation/working, high = better): 117.0 %
Waterplane Area: 12,293 Square feet or 1,142 Square metres
Displacement factor (Displacement / loading): 92 %
Structure weight / hull surface area: 44 lbs/sq ft or 213 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 1.57
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

32

Monday, August 19th 2013, 9:40am

I've been reworking my plans for 1943 somewhat. As opposed to the Balista class DDs, Im going to be giving AA refits for some of the existing classes. For the most part this will involve swapping out LA 135mm gun from 100mm DP guns and refreshing the light armament to more modern 37mm and 25mm guns. There might be some variation between classes, but this is the main aim. In Character reasoning follows.

On the refiting of 135mm armed destroyers with 100mm DP guns.

It is the findings of this board that the LA 135mm armed destroyers are underguned for the primary roll they are now expected to serve; these being ones of AA coverage foremost as opposed to surface engagements.
1) Most of these classes cannot mount the existing 152mm gun in sufficient number without extensive modification. New hulls are best for the 152mm gun.
2) The 76mm automatic is viewed by this board as to light of a Anti-surface weapon for dealing with other destroyers. Also there are possible issues with magazine size on small hulls in comparison to large cruisers and capital ships.
3) The 100mm DP gun is viewed as having enough anti-surface abilities to handle warships of similar size. Against larger targets like traditional cruisers or capital ships, torpedo would be used by a destroyer regardless of whether it was armed with 152mm or 100mm guns

With that in mind, I present a refit of the Impavido class destroyers.

Cost: 315.5 tons per ship
Time: 1.6656 months per ship (Just under one quarter)
Modifications:Replacement of the main battery with 100mm DP guns. Updated light AA armament. General life extension refit or replacement of critical structures. Addition of electronic sensors and other miscellaneous equipment.

Impavido Class (AA refit), Italian Destroyer laid down 1933

Displacement:
2,104 t light; 2,231 t standard; 2,644 t normal; 2,974 t full load

Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 42.65 ft x 13.78 ft (normal load)
120.00 m / 120.00 m x 13.00 m x 4.20 m

Armament:
8 - 3.94" / 100 mm guns in single mounts, 33.07lbs / 15.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 4 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.98" / 25.0 mm guns in single mounts, 0.53lbs / 0.24kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 306 lbs / 139 kg
Shells per gun, main battery: 400
8 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.39" / 10 mm - -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 40,000 shp / 29,840 Kw = 32.94 kts
Range 4,000nm at 20.00 kts
Bunker at max displacement = 743 tons

Complement:
183 - 239

Cost:
£1.248 million / $4.992 million

Distribution of weights at normal displacement:
Armament: 36 tons, 1.3 %
Armour: 24 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,146 tons, 43.3 %
Hull, fittings & equipment: 798 tons, 30.2 %
Fuel, ammunition & stores: 540 tons, 20.4 %
Miscellaneous weights: 100 tons, 3.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,140 lbs / 517 Kg = 37.4 x 3.9 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 2.5 ft / 0.8 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 9.23 : 1
'Natural speed' for length: 23.11 kts
Power going to wave formation at top speed: 65 %
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: 27.89 ft / 8.50 m
- Forecastle (15 %): 21.33 ft / 6.50 m
- Mid (53 %): 21.33 ft / 6.50 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.86 ft / 5.45 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 156.7 %
- Above water (accommodation/working, high = better): 114.7 %
Waterplane Area: 10,727 Square feet or 997 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 2.01
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

33

Monday, August 19th 2013, 9:51am

Refit of the Antonio Mosto Class Destroyers
Cost: 247 tons per ship
Time: 1.5972 months per ship (Just under one quarter)
Modifications: Refurbishment of the main battery with 100mm DP guns. Updated light AA armament. General life extension refit or replacement of critical structures. Addition of electronic sensors and other miscellaneous equipment.

Antonio Mosto, Italian Destroyer laid down 1937

Displacement:
1,648 t light; 1,740 t standard; 2,042 t normal; 2,284 t full load

Dimensions: Length overall / water x beam x draught
395.73 ft / 377.30 ft x 36.09 ft x 13.12 ft (normal load)
120.62 m / 115.00 m x 11.00 m x 4.00 m

Armament:
6 - 3.94" / 100 mm guns (3x2 guns), 33.07lbs / 15.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 2 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns in one mount, 1.55lbs / 0.70kg shells, 1943 Model
Anti-aircraft guns in deck mount
on centreline aft, 4 raised guns - superfiring
12 - 0.98" / 25.0 mm guns in single mounts, 0.53lbs / 0.24kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 217 lbs / 98 kg
Shells per gun, main battery: 400
4 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,003 shp / 25,366 Kw = 32.81 kts
Range 3,500nm at 20.00 kts
Bunker at max displacement = 544 tons

Complement:
151 - 197

Cost:
£1.120 million / $4.480 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.2 %
Armour: 26 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 904 tons, 44.3 %
Hull, fittings & equipment: 613 tons, 30.0 %
Fuel, ammunition & stores: 394 tons, 19.3 %
Miscellaneous weights: 80 tons, 3.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
717 lbs / 325 Kg = 23.5 x 3.9 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 86 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.27

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.45 : 1
'Natural speed' for length: 22.38 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 19.69 ft / 6.00 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 16.11 ft / 4.91 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 158.6 %
- Above water (accommodation/working, high = better): 124.6 %
Waterplane Area: 8,698 Square feet or 808 Square metres
Displacement factor (Displacement / loading): 93 %
Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.00
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

34

Friday, August 23rd 2013, 7:08am

Reconstruction of Aquila and Europa
Cost: 12011.5 tons per ship
Time: 16.5115 months (Just over 5 quarters)
Modifications: Bulged to 30m beam. Replacement of the Main and Anti-Aircraft batteries with modern 76mm, 37mm, and 25mm weaponry. Replacement of the engines with 152,000SHP units for 33.02knts. Revamping of the armor layout to one similar of the Andrea Doria class. New bow similar to the Andrea Doria class. Airgroup and flight facilities reconstructed for 72 modern aircraft. Addition of modern electronics suite similar to Andrea Doria. Modernization of AVGAS handling and safety equipment. Addition of modern steam catapults. Reworking of seaplane handling equipment. Provisioning for service as a Underway Replenishment ship for small vessels. Reinforcement of the well deck for load bearing.

Aquila Class (refit), Italian Aircraft Carrier laid down 1927 (Engine 1943)

Displacement:
24,023 t light; 24,738 t standard; 28,742 t normal; 31,945 t full load

Dimensions: Length overall / water x beam x draught
757.09 ft / 721.78 ft x 91.86 ft (Bulges 98.43 ft) x 27.23 ft (normal load)
230.76 m / 220.00 m x 28.00 m (Bulges 30.00 m) x 8.30 m

Armament:
16 - 2.99" / 76.0 mm guns (8x2 guns), 13.39lbs / 6.07kg shells, 1943 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts - superfiring
24 - 1.46" / 37.0 mm guns (6x4 guns), 1.55lbs / 0.70kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships
40 - 0.98" / 25.0 mm guns (10x4 guns), 0.48lbs / 0.22kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 271 lbs / 123 kg
Shells per gun, main battery: 800

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.42" / 36 mm 375.33 ft / 114.40 m 16.40 ft / 5.00 m
Ends: 1.42" / 36 mm 346.42 ft / 105.59 m 16.40 ft / 5.00 m
Main Belt covers 80 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead and Bulges:
2.36" / 60 mm 375.33 ft / 114.40 m 22.97 ft / 7.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Armour deck: 2.95" / 75 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 152,000 shp / 113,392 Kw = 33.03 kts
Range 6,000nm at 25.00 kts
Bunker at max displacement = 7,207 tons

Complement:
1,103 - 1,434

Cost:
£5.176 million / $20.702 million

Distribution of weights at normal displacement:
Armament: 39 tons, 0.1 %
Armour: 4,089 tons, 14.2 %
- Belts: 687 tons, 2.4 %
- Torpedo bulkhead: 753 tons, 2.6 %
- Armament: 35 tons, 0.1 %
- Armour Deck: 2,557 tons, 8.9 %
- Conning Tower: 56 tons, 0.2 %
Machinery: 3,926 tons, 13.7 %
Hull, fittings & equipment: 8,457 tons, 29.4 %
Fuel, ammunition & stores: 4,719 tons, 16.4 %
Miscellaneous weights: 7,512 tons, 26.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,426 lbs / 19,698 Kg = 3,242.2 x 3.0 " / 76 mm shells or 6.6 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.7 ft / 1.7 m
Roll period: 17.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.17

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.520
Length to Beam Ratio: 7.33 : 1
'Natural speed' for length: 31.38 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 37.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 33.79 ft / 10.30 m
- Forecastle (24 %): 33.79 ft / 10.30 m (23.95 ft / 7.30 m aft of break)
- Mid (50 %): 23.95 ft / 7.30 m
- Quarterdeck (24 %): 23.95 ft / 7.30 m
- Stern: 23.95 ft / 7.30 m
- Average freeboard: 26.31 ft / 8.02 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.8 %
- Above water (accommodation/working, high = better): 193.6 %
Waterplane Area: 46,815 Square feet or 4,349 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 122 lbs/sq ft or 596 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.33
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

72 Combat Aircraft (5184t)
10 Crated spares (1000t)
200t Aircraft operations centre
50t RaA.6 Air Search radar
20t RaA.5 Air Search radar
20t RaS.4 Surface Search radar x2
30t 2 x GDR1R FC Systems
30t 6 x GDR5 FC Systems
Well deck renforcement (200t)
Inert gas shielding for AVGAS storrage and transfer lines (250t)
Flag facilies (250t)
Underway refueling equipment (100t)
Seaplane servicing equipment (50t)
Two catapults similar to those of Andrea Doria (50t)
Improved crew comfort items (28t)
Construction reserve (200t)

Aquila goes into the yard in Q1/43, Europa Q2/44
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

This post has been edited 1 times, last edit by "snip" (Aug 23rd 2013, 6:47pm)


35

Friday, August 23rd 2013, 7:27am

Refit of the Rosolino Pilo Class Destroyers
Cost: 345 tons per ship
Time: 1.69515 months per ship (Just under one quarter)
Modifications: Refurbishment of the main battery with 152mm DP guns. Updated light AA armament. General life extension refit or replacement of critical structures. Addition of electronic sensors and other miscellaneous equipment.

Rosolino Pilo (refit), Italian Destroyer laid down 1936

Displacement:
2,301 t light; 2,459 t standard; 2,883 t normal; 3,223 t full load

Dimensions: Length overall / water x beam x draught
405.34 ft / 393.70 ft x 42.65 ft x 14.76 ft (normal load)
123.55 m / 120.00 m x 13.00 m x 4.50 m

Armament:
4 - 5.98" / 152 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.65lbs / 0.75kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
8 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 427 lbs / 194 kg
Shells per gun, main battery: 400
8 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 44,000 shp / 32,824 Kw = 33.23 kts
Range 4,000nm at 20.00 kts
Bunker at max displacement = 764 tons

Complement:
196 - 255

Cost:
£1.553 million / $6.212 million

Distribution of weights at normal displacement:
Armament: 57 tons, 2.0 %
Armour: 45 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 33 tons, 1.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 12 tons, 0.4 %
Machinery: 1,186 tons, 41.1 %
Hull, fittings & equipment: 813 tons, 28.2 %
Fuel, ammunition & stores: 582 tons, 20.2 %
Miscellaneous weights: 200 tons, 6.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,039 lbs / 471 Kg = 9.7 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.407
Length to Beam Ratio: 9.23 : 1
'Natural speed' for length: 23.08 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 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: 16.93 ft / 5.16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 157.9 %
- Above water (accommodation/working, high = better): 100.4 %
Waterplane Area: 10,773 Square feet or 1,001 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 42 lbs/sq ft or 205 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.68
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

36

Friday, August 23rd 2013, 10:28am

Steam catapults? First I've heard of any Italian developments in this field. Seems pretty quick to add them. The RN has been working on steam catapults since 1939. A design has been made to work but sea trials aren't due to start until 1945.

37

Friday, August 23rd 2013, 6:47pm

Quoted

Originally posted by Hood
Steam catapults? First I've heard of any Italian developments in this field. Seems pretty quick to add them. The RN has been working on steam catapults since 1939. A design has been made to work but sea trials aren't due to start until 1945.

I need to stop doing sims after 12AM... changed to "catapults similar to those of Andrea Doria"
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

38

Saturday, August 24th 2013, 3:40am

I realize that the Pilo design was originally constructed with four single 152mm guns, but I wonder if they could successfully carry a twin DP mount on a 13 metre beam with such a sharp bloc coefficient? Not saying that it can't be done but wondering what the general thinking might be.

39

Saturday, August 24th 2013, 3:42am

They still cary four single mounts, just with updated guns.
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

40

Saturday, August 24th 2013, 3:44am

Quoted

Originally posted by snip
They still cary four single mounts, just with updated guns.


I'm sorry - for some reason I read them as twins. Gotta clean those glasses. :rolleyes: