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fighting ships of the world

ARGENTINEAN NAVY (ARGENTINA)

CAPITAL SHIPS

RIVADAVIA battleships (1914-1915)

Moreno 1915

Moreno 1939

Name Yard No Builder Laid down Launched Comp Fate
Rivadavia 187 Fore River, Quincy, USA 25/5/1910 26/8/1911 12/1914 disarmed 1952, stricken 2/1957
Moreno 103 New York SB, Camden, USA 9/7/1910 23/9/1911 3/1915 accommodation ship 1949, stricken 10/1956

  

Displacement normal, t

27940

Displacement full, t

30600

Length, m

178.3 pp 181.3 oa

Breadth, m

30.0

Draught, m

8.50 normal

No of shafts

3

Machinery

Curtiss geared steam turbines, 18 Babcock & Wilcox boilers

Power, h. p.

39500

Max speed, kts

22.5

Fuel, t

coal 4000 + oil 600

Endurance, nm(kts)

11000(11)

Armour, mm

belt: 280 - 254, ship ends: 127 - 102, upper belt: 229 - 203, deck: 76 + 38, turrets: 305 - 229, barbettes: 305, casemates: 152, CT: 305

Armament

6 x 2 - 305/50 Bethlehem, 12 x 1 - 152/50 Bethlehem, 16 x 1 - 102/50 Bethlehem, 2 - 533 TT (beam)

Complement

1130

Ship project history: In 1908, in reply to building of two dreadnoughts by Brazil, Argentina accepted huge shipbuilding program, according to which it was supposed to build 2 battleships (it was provided to increase their number to three in case Brazil will orders third ship), 6 destroyers and 12 torpedo boats. Competition was simultaneously declared, to which 15 companies from France, Germany, United Kimgdom, Italy and USA have responded. Having considered received projects, Argentineans did not begin to give out the order, and taking the best in their opinion from presented designs, have corrected the requirements and declared new competition. American "Fore River" as a result has won, whose price, 2,214,000£. was lower on 224,000£, than at the nearest competitor. Contract for building of Rivadavia and Moreno has been signed 22/1/1910.
    The history with double competition has displeased the participants who have charged Argentineans in breach of commercial confidence. Nevertheless, created in a backweight to Brazilian dreadnoughts, Argentina battleships notably exceeded them: they were larger, faster, were better protected, and at expense of more rational placing of main gun turrets at the same total salvo benefited in side salvo.
   
    On machinery arrangement Argentina battleships very much reminded Italian Dante Alighieri: boiler rooms were allocated nearer to extremities, and engine rooms and main gun turrets were located between them. Three shafts became unique significant difference of these ships. On trials any ships has not reached a designed power (45000hp) and speed (23kts), 39750hp and 22.5kts were best result.
    The artillery also was made in the USA. Bethlehem 305mm guns were the version of Mk 7 gun, made for US Navy and were installed in six twin turrets under mixed scheme (end turrets on superfiring scheme, as in the US Navy, medium turrets diagonally, as on British and German ships). Fire angles of medium turrets on an opposite side were 100.
    Secondary artillery at the moment of commission was the most numerous in the world: besides of 12 152mm/50 guns in armoured casemates on battery deck there were also 16 102mm/50 guns installed where only it was possible: on two in unprotected casemates near forecastle and stern, on two opened on a deck near to end turrets, remaining on two on turret roofs.

    Later it was supposed to equip ships with seaplane, for what in 1928 were 6 Fairey IIIF bought, however on battleships they for some reasons were never carried.

Ship protection: Protection scheme in general repeated accepted in Royal Navy. Main belt 2.4m in height covered all hull length, only a little not reaching stern frame. Armour plates reached 254mm thickness abreast barbettes of end turrets and 280mm between them; further in a bow and a stern the belt had 127mm and 102mm thickness respectively. Over the main belt there was upper 229-203mm belt. Battery deck between end barbettes had 38mm thickness. Main 76mm deck placed at level of an upper edge of the main belt. Not reaching about 2.5m to a side, it under 45 angle was dipped downwards and adjoined lower edge of the belt. In a bow and stern from end turrets main deck was dipped on one level lower and became flat. Underwater protection consisted of 76mm longitudinal bulkhead, dipped from main armour deck break to a double bottom and placed in 2.5m from a side. Besides, on these ships for the first time in the world an attempt to defend the machinery and magazines from explosion under the bottom has been undertaken: decks (more precisely platforms) of these compartments were protected by 19mm armour.

Modernizations: (1924-1926, Boston N Yd), Rivadavia; (1924-1926, Philadelphia N Yd/Boston N Yd), Moreno: machinery was replaced by Curtiss geared steam turbines, boilers were converted to oil fuel only (45000hp, 20kts, 2300t oil, 8030(14)nm), main mast was replaced by tripod; - 16 x 1 - 102/50; + 4 x 1 - 76/52 Mk 10

1943 - 1944, both: + 4 x 1 - 40/56 Mk 1/2

Naval service: Rivadavia 3/10/1941 was damaged at collision with cruiser Almirante Brown. In 1952 ship was disarmed and 30/5/1957 sold for scrap. Moreno since 1949 was used as accommodation ship and sold for scrap 11/1/1957.

Rivadavia 1926

Moreno 1937

Ivan Gogin, 2011-15