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Japan's Imperial Navy flag

Japan's Ibuki light aircraft carrier

Design

Originally laid down as Ibuki / Suzuya / Mogami class cruiser on April 24, 1942, it decided to make her as a high speed oiler. However that was never done and in November 1943 the hull went to the Sasebo Navy Yard to be made into an aircraft carrier. The flight deck had been added on top of the hangar by late 1944.

Abandoned

Construction continued slowly until March 1945 at which time the Ibuki was abandoned with it only about 80% completed. The Japanese Navy felt that suicide craft were more urgently needed.

Boiler Removal

As the conversion to an aircraft carrier started six of the boilers were removed to make room for oil.

Hangar

There was a single hangar.

Flight Deck

The flight deck had two elevators.

Ships

IJN Ibuki

  • Formerly a Mogami / Suzuya class cruiser
  • Manufacturer: Kure, Kure Navy Yard
  • April 24, 1942, May 21, 1943, May 25, 1943: Launched.
  • May 21, 1943: Completed.
  • 1943: Conversion to carrier ordered.
  • March 1945: Cancelled.

Specifications

  Ibuki
Crew 1,015
Displacement 12,500 tons
Physical Characteristics  
Length 658', 672' 7"
200.6 m, 205 m
Length - Water Line 650' 6", 650' 9"
198.3 m, 198.35 m
Length - Between Perpendiculars 616', 616' 2"
187.5 m, 187.8 m
Beam 69' 6", 69' 7", 70'
21.2 m
Draft / Height 20' 6", 20' 8", 21'
6.3 m, 6.31 m
Flight Deck 660' x 75' 6", 672' 5" x 75' 6", 672' 6" x 75' 6", 673' x 75'
201 m x 23 m, 205 m x 23 m
Performance  
Speed 29 knots
Range at 18 knots 7,500 nautical miles
Armament Depth charges: 30
Anti-Aircraft 3.9": 4
3" L/40 twin mounts: 2
3" L/60: 4
25 mm: 48
25 mm triple mounts: 16
28 barrel rocket launchers: 6
Rocket launchers: 168
Aircraft 27
Armor  
Engines  
Boilers 4
Kanpon: 4
Shafts 2, 4
Turbines Geared
Kanpon Geared
HP 72,000
Oil 3,000 tons

Sources:

  1. Japanese Warships of World War II, A. J. Watts, 1966
  2. The Imperial Japanese Navy, A. J. Watts and B. G. Gordon, 1971
  3. Conway's All the World's Fighting Ships 1922-1946, Robert Gardiner, 1987
  4. The World's Aircraft Carriers 1914 - 1945, Roger Chesneau, 1986
20th Century American Military History Crucial Site