The Pacific War Online Encyclopedia
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|Tonnage||35,800 tons standard displacement
|Dimensions||708' by 104'1" by 30'2"
215.8m by 31.72m by 9.19m
|Maximum speed||25.3 knots|
16x1 5.5"/50 guns
4x2 5"/40 dual-purpose guns
10x2 25mm AA guns
|Protection||12" (305mm) belt and bulkheads
2.25" (57mm) armored deck
1"+1"+1.25" (25mm+25mm+32mm) splinter deck
3" (76mm) deck over steering
12"/10"/4.5" (305mm/203mm/114mm) turret face/sides/roof
12" (305mm) barbette
6" (152mm) casemate
13.75" (305mm) conning tower
5.8" (229mm) uptakes
17' torpedo bulges with 1" Ducol holding bulkheads and two outer void and two inner liquid compartments
||4-shaft Kampon geared turbine
8 Kampon boilers
|Bunkerage||5113 tons fuel oil|
|Range||7870 nautical miles (14,580km)) at 16 knots|
installations were shipped just prior to the Midway operation, Type 22 on Hyuga and Type 21 on Ise.
Reconstructed as hybrid carrier-battleships in 1943-44. The two rear main turrets were removed and replaced with a small flight deck with a capacity of 22 aircraft. The 5"/40 dual-purpose guns were replaced with 57 25mm/60 AA guns. The range became 9449 nautical miles (17,500km) at 16 knots.
In June 1944 the antiaircraft armament was
further increased, to a
of 104 25mm AA guns.
In September 1944 the antiaircraft armament included 6x30 5" (127mm) rocket launchers.
In October 1944 the catapults were removed to improve the firing arcs of the remaining main turrets.
The Ises, built in 1917-1918, were similar to the previous Fusos. However, they had an improved internal arrangement, had better siting of their main turrets, and replaced the 6" secondary battery with 5.5" guns.
Obsolescent by 1943, the Ises were converted to hybrid carrier-battleships, with the rear main turrets removed and replaced with a small flight deck with a capacity of 22 aircraft. They were not a success. The small air group was inadequate for anything but escort duty and aircraft ferrying, and while a hybrid carrier-battleship made an impressive escort vessel, it was hardly cost-effective. As fleet carrier units, they were a complete bust.
A peculiarity of the flight decks was that they were covered with 8" (20 cm) of concrete, primarily to compensate for the loss of the two rear turrets, which made the ships too
stable. The concrete also acted as a crude form of armor which did not
further drain Japan's already depleted stocks of high-quality steel.
|Hyuga||Hashirajima||Sunk by aircraft 1945-7-24 in the Inland Sea|
|Ise||Hashirajima||Sunk by aircraft 1945-7-28 in the Inland Sea|
CombinedFleet.com (accessed 2007-11-29)
Evans and Peattie (1997)
Gogin (2010; 2012;12-24)
Jentschura, Jung, and Mickel (1977)
The Pacific War Online Encyclopedia © 2007, 2009, 2012, 2015 by Kent G. Budge. Index
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