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IOWA 1st class battleship (1897)


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Iowa

Ships


No Name Yard No Builder Laid down Launched Comm Fate
BB4, 3/1919- BC4 Iowa, 3/1919- Coast Battleship No 4 276 Cramp, Philadelphia 5/8/1893 28/3/1896 16/6/1897 target 7/1921


Technical data


Displacement normal, t

11410

Displacement full, t

12647

Length, m

110.5

Breadth, m

22.0

Draught, m

7.32 mean

No of shafts

2

Machinery

2 VTE, 5 cylindrical boilers

Power, h. p.

11000

Max speed, kts

16

Fuel, t

coal 1795

Endurance, nm(kts)5140(10)
Armour, mm

Harvey - belt: 356 - 102, bulkheads: 305, deck: 70 - 76, barbettes: 381 - 313, main turrets: 381 - 51, secondary turrets: 152 - 51, CT: 254

Armament

2 x 2 - 305/35 Mk II, 4 x 2 - 203/37 Mk IV, 6 x 1 - 102/40 Mk VI, 20 x 1 - 57/40 Hotchkiss Mk I/II, 4 x 5 - 37/20 Hotchkiss Mk I, 4 - 356 TT (4 beam, 1 bow, 1 stern, 16)

Complement

486



Standard scale images


<i>Iowa</i> 1897
Iowa 1897
<i>Iowa </i>1912
Iowa 1912


Graphics


<i> Iowa</i>
Iowa
<i> Iowa </i>1917 (Naval History and Heritage Command)
Iowa 1917 (Naval History and Heritage Command)
<i> Iowa </i>1898
Iowa 1898
<i>Iowa</i> 1910
Iowa 1910


Ship project history


Authorized under the Act of 19/7/1892. A distinct improvement on the Indiana class apart from the 305mm main armament. There was a forecastle deck to just forward of the after turret, well improved seaworthiness of the ship. The 305mm turrets were balanced and hydraulically trained with axis heights of 7.8m fore and 5.6m aft, above Iwl, while the 203mm turrets, at the same height as the fore 305mm, were closer together and further outboard than in Indiana. Of the 102mm guns four were in sponsons below the forecastle deck and two aft on the superstructure.

Ship protection


The belt was 56.7m long though its depth was 2.28m (0.91m over and 1.37m under waterline), it was tapered from 356mm at 0.3m below the wl to the 178mm at lower edge. There were angled 305mm bulkheads to the barbettes, and the upper belt was only 127mm. The armour deck was flat at the upper edge of the 356mm belt and 70mm but lowered at the ends where it was 76mm. Main guns were installed in turrets with 381mm sides, 51mm crowns and 381mm barbettes, secondary 203mm guns had turrets with 152mm sides, 51mm crowns and 203mm (152mm inboards) barbettes.

Modernizations


1909: - 20 x 1 - 57/40, 4 x 5 - 37/20, 4 - 356 TT; + 4 x 1 - 102/40 Mk VI, cage mainmast was installed

Naval service


Iowa was renamed Coast Battleship No 4 on 29/3/1919 and was the first radio controlled target ship to be used in a fleet exercise.

(Naval History and Heritage Command)