WesWorld

50 ton difference, 900 tons total. A note, this design was just all manor of buggered up in SS3, so this is a very messy sim.

F Class, Italian Frigate laid down 1938

Displacement:
1,303 t light; 1,349 t standard; 1,570 t normal; 1,747 t full load

Dimensions: Length overall / water x beam x draught
298.56 ft / 295.28 ft x 35.79 ft x 11.15 ft (normal load)
91.00 m / 90.00 m x 10.91 m x 3.40 m

Armament:
3 - 3.00" / 76.2 mm guns in single mounts, 13.78lbs / 6.25kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount
12 - 0.98" / 25.0 mm guns (1x12 guns), 0.53lbs / 0.24kg shells, 1938 Model
Anti-aircraft guns in deck mount
on side amidships
Weight of broadside 48 lbs / 22 kg
Shells per gun, main battery: 500

Armour:
- 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 - -

- Conning tower: 2.76" / 70 mm

Machinery:
Diesel Internal combustion motors,
Electric cruising motors plus geared drives, 2 shafts, 7,130 shp / 5,319 Kw = 22.26 kts
Range 6,000nm at 15.00 kts
Bunker at max displacement = 398 tons

Complement:
124 - 162

Cost:
£0.438 million / $1.754 million

Distribution of weights at normal displacement:
Armament: 6 tons, 0.4 %
Armour: 15 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 8 tons, 0.5 %
Machinery: 195 tons, 12.4 %
Hull, fittings & equipment: 944 tons, 60.1 %
Fuel, ammunition & stores: 267 tons, 17.0 %
Miscellaneous weights: 143 tons, 9.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,742 lbs / 2,151 Kg = 351.3 x 3.0 " / 76 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 1.3 ft / 0.4 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.09
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.466
Length to Beam Ratio: 8.25 : 1
'Natural speed' for length: 20.01 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (40 %): 16.40 ft / 5.00 m
- Quarterdeck (25 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 17.08 ft / 5.21 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 55.0 %
- Above water (accommodation/working, high = better): 179.7 %
Waterplane Area: 7,101 Square feet or 660 Square metres
Displacement factor (Displacement / loading): 264 %
Structure weight / hull surface area: 66 lbs/sq ft or 322 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.15
- Longitudinal: 7.37
- Overall: 1.39
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

10t per 76/62 mounting
1t per 25mm mounting
10t = 2 x GDR.5 FCS
15t = D5 sonar
7t = Scaricabombe
10t = Lanciabombe AS
50t = 150 Depth charges
9t = 250hp electric creeping motors
121tons

8knts on creeping motors

13 ton difference, 260 tons total.

MZ721, Italian Auxiliary laid down 1936

Displacement:
263 t light; 275 t standard; 303 t normal; 326 t full load

Dimensions: Length overall / water x beam x draught
169.55 ft / 164.04 ft x 23.43 ft x 3.94 ft (normal load)
51.68 m / 50.00 m x 7.14 m x 1.20 m

Armament:
1 - 3.94" / 100 mm guns in single mounts, 30.42lbs / 13.80kg shells, 1936 Model
Quick firing gun in deck mount
on centreline forward
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.65lbs / 0.75kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all forward
Weight of broadside 44 lbs / 20 kg
Shells per gun, main battery: 200

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
2nd: 0.39" / 10 mm - -

- Conning tower: 2.76" / 70 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 500 shp / 373 Kw = 12.76 kts
Range 4,100nm at 10.00 kts
Bunker at max displacement = 51 tons

Complement:
36 - 47

Cost:
£0.083 million / $0.330 million

Distribution of weights at normal displacement:
Armament: 5 tons, 1.8 %
Armour: 3 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.9 %
Machinery: 14 tons, 4.6 %
Hull, fittings & equipment: 120 tons, 39.5 %
Fuel, ammunition & stores: 40 tons, 13.3 %
Miscellaneous weights: 120 tons, 39.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
597 lbs / 271 Kg = 19.6 x 3.9 " / 100 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 0.8 ft / 0.2 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.701
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 40.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 6.56 ft / 2.00 m
- Forecastle (20 %): 5.91 ft / 1.80 m
- Mid (50 %): 5.58 ft / 1.70 m
- Quarterdeck (15 %): 5.58 ft / 1.70 m
- Stern: 5.58 ft / 1.70 m
- Average freeboard: 5.74 ft / 1.75 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.1 %
- Above water (accommodation/working, high = better): 92.2 %
Waterplane Area: 3,083 Square feet or 286 Square metres
Displacement factor (Displacement / loading): 156 %
Structure weight / hull surface area: 31 lbs/sq ft or 150 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.12
- Longitudinal: 1.16
- Overall: 1.12
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate

Since these three ships were not payed for correctly (RA only played 1100 tons for them per the 1938 reports), the difference of will be payed in Q4/41. 19,038 tons total.

Fleet Replenishment Vessel, Italian Auxiliary laid down 1938

Displacement:
7,446 t light; 7,770 t standard; 15,821 t normal; 22,262 t full load

Dimensions: Length overall / water x beam x draught
459.32 ft / 459.32 ft x 65.62 ft x 26.25 ft (normal load)
140.00 m / 140.00 m x 20.00 m x 8.00 m

Armament:
2 - 2.99" / 76.0 mm guns in single mounts, 13.39lbs / 6.08kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all aft
4 - 1.46" / 37.0 mm guns (1x4 guns), 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mount
on centreline forward
2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all aft
Weight of broadside 36 lbs / 16 kg
Shells per gun, main battery: 300

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 -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 20,000 shp / 14,920 Kw = 19.66 kts
Range 90,000nm at 12.00 kts
Bunker at max displacement = 14,492 tons

Complement:
704 - 916

Cost:
£1.922 million / $7.690 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.0 %
Armour: 5 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 548 tons, 3.5 %
Hull, fittings & equipment: 3,389 tons, 21.4 %
Fuel, ammunition & stores: 8,375 tons, 52.9 %
Miscellaneous weights: 3,500 tons, 22.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,102 lbs / 19,551 Kg = 3,218.0 x 3.0 " / 76 mm shells or 5.7 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 3.4 ft / 1.1 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak
Block coefficient: 0.700
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 21.43 kts
Power going to wave formation at top speed: 48 %
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: 32.81 ft / 10.00 m
- Forecastle (30 %): 24.61 ft / 7.50 m (16.40 ft / 5.00 m aft of break)
- Mid (60 %): 16.40 ft / 5.00 m (24.61 ft / 7.50 m aft of break)
- Quarterdeck (15 %): 24.61 ft / 7.50 m
- Stern: 24.61 ft / 7.50 m
- Average freeboard: 23.13 ft / 7.05 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 37.0 %
- Above water (accommodation/working, high = better): 131.6 %
Waterplane Area: 24,157 Square feet or 2,244 Square metres
Displacement factor (Displacement / loading): 341 %
Structure weight / hull surface area: 86 lbs/sq ft or 420 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.22
- Overall: 1.01
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

500tons handling equipment/cranes etc
3000tons stores
14500tons oil fuel

For the ships already constructed, there is a total difference of 22,989 tons between the SS3 and SS2 sims for those ships, counting error correction of the FRV initial purchase price. The Zara class Cruisers and the Navigatori class Destoyers which were under refit in 1941 also need to be resimed. Any error correction will be folded into the Q4/41 report as well. If there are any questions about this figure, please ask away.

I think you have done an excellent job here, tackling a rather daunting challenge. I don't see much to complain in the re-sims, and you've pointed out those that the best that can be done with what you have. I particularly like the fact that you've tackled those fleet auxiliaries.

Good work!