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REGIA MARINA - ITALIAN NAVY (ITALY)

CAPITAL SHIPS

DUILIO battleships (1915-1916)

Andrea Doria 1918

Name No Builder Laid down Launched Comp Fate
Andrea Doria   R. Arsenale di La Spezia 24/3/1912 30/3/1913 13/3/1916 stricken 11/1956
Caio Duilio   R. Cantiere di Castellamare di Stabia 24/2/1912 24/4/1913 10/5/1915 stricken 9/1956

 

Displacement normal, t

Andrea Doria: 22956

Duilio: 22994

Displacement full, t

Andrea Doria: 24729

Caio Duilio: 24715

Length, m

168.9 wl 176.1 oa

Breadth, m

28.0

Draught, m

8.90 normal 9.50 max

No of shafts

4

Machinery

Parsons geared steam turbines, 20 Yarrow boilers

Power, h. p.

Andrea Doria: 30000

Caio Duilio: 31009

Max speed, kts

Andrea Doria: 21

Caio Duilio: 21.3

Fuel, t

coal 1488 + oil 886

Endurance, nm(kts) 4800(10)

Armour, mm

belt: 250 - 80, upper belt: 220, turrets: 280, barbettes: 280, battery: 130, CT: 280, main deck: 24 with 40mm slopes, middle deck: 30, upper deck: 44 - 30, forecastle deck: 44

Armament

Andrea Doria: 3 x 3 - 305/46 V1909, 2 x 2 - 305/46 V1909, 16 x 1 - 152/45 A1911, 13 x 1 - 76/50 V1909, 6 x 1 - 76/50 V1909 AA, 3 - 450 TT sub (1 bow, 2 beam)

Caio Duilio: 3 x 3 - 305/46 A1909, 2 x 2 - 305/46 A1909, 16 x 1 - 152/45 A1911, 13 x 1 - 76/50 A1909, 6 x 1 - 76/50 A1909 AA, 3 - 450 TT sub (1 bow, 2 beam)

Complement

1233

Ship project history: Andrea Doria class battleships were built as development of Conte di Cavour, had a little smaller breadth, thicker barbettes armour and differed from predecessors by lower arrangement of medium triple main gun turret and structure of medium artillery.

After modernization in 1937 of two ships of Conte di Cavour class, modernization of Doria (at Trieste) and Duilio (at Genoa) was started. The volume and structure of works was practically same to what on Conte di Cavour class have undergone: the hull was extended, the armament and machinery changed, protection was increased, though there was also a number of differences. So, Doria and Duilio received hardly less powerfull machinery, and on them additional armour of barbettes was not installed, being original thicker, than on Conte di Cavour. Auxiliary armament significantly differed: instead of 120mm guns there were 135mm/45 in four triple turrets grouped around a forward superstructure. Instead of out-of-date AA 100mm/47 guns on Doria and Duilio there were installed the newest 90mm guns, as well as on Vittorio Veneto class.

To a beginning of war on Mediterranean sea Doria class ships were late and were re-commissioned only in August (Duilio) and October, 1940 (Doria).

Ship protection: Main belt was 2.8m high and protected full ship length. Its thickness was 250mm between end barbettes tapering to 170mm from middle part at lower edge, decreasing to 80 and 130mm at fore and aft ends respectively. Upper 220mm belt between end barbettes had 2.3m height. Additional 130mm belt between stem and barbette No 4 had 138m length. Main deck had 24mm thickness at flat part and connected with lower edge of main belt by 40mm slopes. 30mm middle deck between barbettes No 1 and 4 laid over upper edge of upper 220mm belt. Upper deck between stem and barbette No 5 was 44-30mm, there was 44mm forecastle deck over casemate. Turrets had 280mm faces, 240mm sides and rears, 85mm crowns. Barbettes had 280mm protection. CT had 280mm sides, reserve aft CT had 180mm protection.

Modernizations: 1925, both: + 6 x 1 - 76/40 Ansaldo 1917, 2 x 1 - 40/39 Vickers-Terni 1917, 1 seaplane

1926, both: + 1 catapult

(1937 - 1940), both were rebuilt as follows:

Andrea Doria 1940

Andrea Doria 1942

Caio Duilio 1942

Name No Reconstructed Yard Fate
Andrea Doria   8/4/1937 - 20/10/1940 CRDA, Trieste stricken 11/1956
Caio Duilio   1/4/1937 - 4/7/1940 Cantieri del Tirreno, Genoa stricken 9/1956

 

Displacement standard, t

23887

Displacement full, t

Andrea Doria: 28882

Caio Duilio: 29391

Length, m

168.9 wl 186.9 oa

Breadth, m

28.6

Draught, m

9.10 normal 10.2 - 10.4 max

No of shafts

2

Machinery

Beluzzo geared steam turbines, 8 Yarrow boilers

Power, h. p.

75000 (87000 forced)

Max speed, kts

26 (28 forced)

Fuel, t

oil 2214

Endurance, nm(kts) 4250(12)

Armour, mm

belt: 250 - 220, upper belt: 170, turrets: 280, barbettes: 280 + 50, secondary turrets: 120, battery: 130, CT: 260, main deck:100 - 80, upper deck: 44

Armament

2 x 3 - 320/44 M1936, 2 x 2 - 320/44 M1934, 4 x 3 - 135/45 OTO 1937, 10 x 1 - 90/50 Ansaldo 1938, 6 x 2 - 37/54 Breda 1932, 3 x 1 - 37/54 Breda 1939, 8 x 2 - 20/65 Breda 1935

Complement

1485

Ship protection as modernized: Main belt was 2.8m high and protected full ship length. Its thickness was 250mm between end barbettes tapering to 170mm from middle part at lower edge, decreasing to 80 and 130mm at fore and aft ends respectively. Upper 220mm belt between end barbettes had 2.3m height. Additional 130mm belt between stem and barbette No 4 had 138m length. New 70mm sides of citadel inside the hull protected machinery and barbettes between main and middle decks. Main deck had 50mm thickness at flat part (central part near centerline was absent) and connected with lower edge of main belt by 40mm slopes. Middle deck between barbettes No 1 and 4 laid over upper edge of upper 220mm belt and was 80mm over machinery, 100mm over magazines and 30mm over other parts. Upper deck between stem and casemate was 44-30mm, there was 44mm forecastle deck over casemate. Turrets had 280mm faces, 240mm sides and rears, 85mm crowns. Barbettes had 280mm protection with additional 50mm plates mounted around them with little spacing. CT had 260mm sides, 120mm roof and 100mm deck. Fwd superstructure had 32-48mm splinter protection.

   New torpedo protection of Pugliese design (with 3.4m diameter inner tube) was 7m deep and could resist exploding of 350kg TNT. Longitudinal torpedo bulkhead had 40mm thickness and connected with 70mm side of inner citadel at main deck level.

Modernizations: spring 1942, both: + 2 x 2 - 37/54 Breda 1932

1944, both: - 3 x 1 - 37/54, 2 x 2 - 20/65

Naval service: During raid of British carrier aircraft to Taranto 12/11/1940 Duilio received hit of one torpedo and till May, 1941 was under repair. Both ships in September, 1943 have left to Malta. After end of the war she remained as part of Italian Navy as training ships.

Andrea Doria 1916

 

Caio Duilio 1943

 

 

Ivan Gogin, 2009-15