page_title: Sōkō Sagyō Ki
section_title: Design
hierarchical_section_title: Sōkō Sagyō Ki / Design
caption_attribution_description: English: SS-Ki of the 5th Independent Engineer Regiment using its crane
context_page_description: The Sōkō Sagyō Ki, also known as the SS-Ki, was a fulltrack engineering vehicle of the Imperial Japanese Army introduced in 1931. The vehicle was considered by the IJA to be one of its most versatile multi-function support vehicles.
context_section_description: The design used the Type 89 I-Go medium tank chassis and hull and a few of its parts. It also featured other parts from various mass-production vehicles. The suspension was made from two blocks of four roadwheels with two return rollers and no independent forward bogie, in addition to semi-elliptical leaf springs. The steering sprocket was placed within the front of the vehicle, whilst the drive sprocket was placed within the rear.
  The turret was removed and replaced with a small commander cupola with fitted observational devices; two claws used for mine clearing were placed in the front, while a winch designed to pull heavy objects was placed in the rear, and was directly powered by the engine. In addition, the chassis had a "tow coupling". The thickness of the armor was reduced to 6mm on the roof and bottom, 13mm at the sides, and 25mm at the front hull, since the vehicle was not intended for combat at the front lines. The vehicle weighed 13 tons and accommodated five crewmembers.
  A Mitsubishi I6 diesel engine was used, which provided 145 horsepower at 1800 rpm, allowing the vehicle to travel at a top speed of 37 km/h; this was in conjunction with a mechanical transmission.
caption: SS-Ki of the 5th Independent Engineer Regiment using its crane
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