O-I super-heavy tank

O-I
O-I
	Diagram illustrating the interior side view of the O-I
Type	Super-heavy tank
Place of origin	Empire of Japan
Production history
Designed	1940 (100-ton O-I), ; 1944 (120+ ton O-I)
Produced	incomplete prototype
No. built	1 incomplete prototype
Specifications
Mass	120+ tons
Length	10.12 m
Width	4.84 m
Height	3.63 m
Crew	11
Armor	maximum of 150 mm
Main; armament	Type 92 105 mm/L45 gun
Secondary; armament	2 x 70 mm guns in the two front hull sub-turrets and 2 x Type 97 7.7 mm machine guns in a rear sub-turret.
Engine	Two V-12 gasoline engines; 550 hp (410 kW) x2
Power/weight	8.33 hp/t
Suspension	coil springs
Maximum speed	25 km/h

O-I was the name given to a proposed series of Japanese super-heavy tanks designed during World War II. The vehicle was planned to be very heavy and have a crew of 11. The complete history of the O-I is unknown, due to the “obscure” nature of the project and the limited documentation that survived post-war.^[3]^[2]

^ ^a ^b ^c ^d ^e ^f ^g Estes 2014, p. 37.
^ ^a ^b ^c ^d ^e ^f ^g ^h Taki’s Imperial Japanese Army page: Super-Heavy Tank "O-I"
^ ^a ^b Estes 2014, pp. 37, 38. Cite error: The named reference "FOOTNOTEEstes201437, 38" was defined multiple times with different content (see the help page).

[FOOTNOTEEstes201437-1] ^ ^a ^b ^c ^d ^e ^f ^g Estes 2014, p. 37.

[Taki-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h Taki’s Imperial Japanese Army page: Super-Heavy Tank "O-I"

[FOOTNOTEEstes201437,_38-3] Estes 2014, pp. 37, 38. Cite error: The named reference "FOOTNOTEEstes201437, 38" was defined multiple times with different content (see the help page).

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O-I super-heavy tank

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