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Four ships laid down 1938
Rimini
Ravenna
Pesaro
Fano

Four ships laid down 1939
Ancona
Pescara
Manfredonia
Barletta


Cacciatorpidiniere Pesante laid down 1938

Displacement:
4,234 t light; 4,496 t standard; 5,210 t normal; 5,782 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(511.51 ft / 492.13 ft) x 49.21 ft x (16.73 / 17.98 ft)
(155.91 m / 150.00 m) x 15.00 m x (5.10 / 5.48 m)

Armament:
6 - 5.98" / 152 mm 53.0 cal guns - 99.21lbs / 45.00kg shells, 300 per gun
Dual purpose guns in turret on barbette mounts, 1938 Model
3 x 2-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
20 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 2,000 per gun
Anti-air guns in deck mounts, 1938 Model
5 x Quad mounts on sides, evenly spread
3 raised mounts
18 - 0.98" / 25.0 mm 77.0 cal guns - 0.54lbs / 0.24kg shells, 4,000 per gun
Anti-air guns in deck mounts, 1938 Model
18 x Single mounts on sides, evenly spread
Weight of broadside 638 lbs / 289 kg
8 - 23.6" / 600 mm, 0.00 ft / 0.00 m torpedoes - 0.000 t each, 0.000 t total
In 4 sets of deck mounted side rotating tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.42" / 36 mm 344.49 ft / 105.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 108 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.76" / 70 mm 1.97" / 50 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.39" / 10 mm - -

- Armoured deck - multiple decks: 0.79" / 20 mm For and Aft decks

- Conning towers: Forward 2.76" / 70 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 58,000 shp / 43,268 Kw = 33.04 kts
Range 3,000nm at 24.00 kts
Bunker at max displacement = 1,286 tons

Complement:
306 - 398

Cost:
£2.544 million / $10.178 million

Distribution of weights at normal displacement:
Armament: 260 tons, 5.0 %
Armour: 556 tons, 10.7 %
- Belts: 195 tons, 3.7 %
- Armament: 151 tons, 2.9 %
- Armour Deck: 192 tons, 3.7 %
- Conning Tower: 18 tons, 0.3 %
Machinery: 1,588 tons, 30.5 %
Hull, fittings & equipment: 1,652 tons, 31.7 %
Fuel, ammunition & stores: 977 tons, 18.7 %
Miscellaneous weights: 178 tons, 3.4 %
- Hull below water: 10 tons
- Hull above water: 20 tons
- On freeboard deck: 60 tons
- Above deck: 88 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,265 lbs / 1,935 Kg = 39.8 x 6.0 " / 152 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 2.3 ft / 0.7 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.450 / 0.465
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 25.47 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 27.89 ft / 8.50 m, 18.04 ft / 5.50 m
- Forward deck: 20.00 %, 18.04 ft / 5.50 m, 18.04 ft / 5.50 m
- Aft deck: 45.00 %, 18.04 ft / 5.50 m, 18.04 ft / 5.50 m
- Quarter deck: 15.00 %, 18.04 ft / 5.50 m, 18.04 ft / 5.50 m
- Average freeboard: 18.83 ft / 5.74 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 115.8 %
- Above water (accommodation/working, high = better): 180.1 %
Waterplane Area: 16,047 Square feet or 1,491 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 65 lbs/sq ft or 319 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 1.59
- Overall: 0.78
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

10t = Scaricabombe
14t = 8 x DC Throwers + 50 W100 charges
10t = D3 sonar
10t = Diesel Emergency Generator
20t = RaA.1 Air Warning Radar
10t = RaS.3 Surface Search Radar
5t = Radio Beacon
20t = 2 x GDR.101
55t = 5 x Quadruple 37/54 mountings (18t ea - 1.75t per gun)
24t = 8 x 650/600 x 8.5 torpedoes

Small modifications to 1938 Type above.

Four ships laid down 1940
Bari
Ostuni
Brindisi
Lecce

Instead of moving towards a common destroyer / escort design, Italy has decided to carry on with the construction of the "heavy" destroyer design instead. The ships laid down in 1940 will have some small alterations from the previous design based on operational and constructional experience. The main change is a new bridge with more room inside for equipment. Other changes include: a reprofiled bow with a larger knuckle; revision of torpedo tube placement; changes to boat types carried; addition of two twin 37mm AA guns in place of some of the 25mm.

Consideration was given to adopting the new dual-purpose 127mm gun instead of the 152/53 but the weapon's development has been protracted after the results from recent firing trials. The new, lighter gun arose after problems were identified with the 152/53 in the anti-aircraft role over the last few years in service. The mechanisation worked into the design was not enough to give a good enough compromise in the AA role. Whilst the gun is very gun for anti-surface work, it was found that sustaining a rate of fire above 8rpm was not practical. The 127mm is more of a compromise that will be poorer in the anti-surface role, but hopefully be able to sustain a rate of fire of 12-15rpm. The high muzzle velocity of the new gun will keep time of flight to similar levels as the 152/53 for increased accuracy.