O-I super-heavy tank
| 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 designation 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.