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)[1] |
Produced | incomplete prototype[2] |
No. built | 1 incomplete prototype |
Specifications | |
Mass | 120+ tons[1] |
Length | 10.12 m[2] |
Width | 4.84 m[2] |
Height | 3.63 m[2] |
Crew | 11[1] |
Armor | maximum of 150 mm[1][2] |
Main armament | Type 92 105 mm/L45 gun[3] |
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.[2] |
Engine | Two V-12 gasoline engines[1] 550 hp (410 kW) x2[1] |
Power/weight | 8.33 hp/t |
Suspension | coil springs[1] |
Maximum speed | 25 km/h[2] |
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]