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Sisu KB-45
Sisu KB-45 is a light off-road lorry made by the Finnish heavy vehicle producer Suomen Autoteollisuus (SAT) in 1965–1970. The two-axle, all-wheel-drive vehicle〔 with payload of 4 000 kg〔 was developed after an assignment of the Finnish Defence Forces. It was followed by almost similar A-45/AH-45 in 1970.〔
== Development ==
KB-45 was developed for the use of light infantry battalions of the Finnish Defence Forces. The project coordinator was Senior Engineer Uoti Hartikainen. The first prototype was built by SAT Testing Department in Fleming Street, Helsinki〔 in March 1964.〔 It was the very last Sisu powered by SAT's own type AMI petrol engine. The axles were made by Kirkstall.〔 The vehicle was nicknamed at an early stage ''Proto'', which was derived from ''prototyyppi'' (prototype).〔
After the first prototype was finished the Defence Forces suddenly changed the specifications; the wheelbase had to be shortened by 30 cm. The decision was based on the Defence Forces' measuring results of average distances between trees in the Finnish forests. The new requirement lead to excessive problems in transmission design; gearbox and reduction gear had to be relocated. A long drive shaft between them had to be substituted by a structurally challenging gear socket system which enabled a shorter distance. Another requirement, replacing the petrol engine by a diesel engine, also caused problems.〔 The original platform fastening system had to be redesigned due to a too small payload.〔 When the final prototype was ready the Defence Forces were satisfied with the result.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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