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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
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IOWA 1st class battleship (1897)


Photo



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


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)