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Type 63 (tank)
The Norinco Type 63 () is a Chinese amphibious light tank. First fielded in 1963, it is in many ways similar to the earlier Soviet PT-76. However, contrary to the popular belief, it does have some essential differences from the PT-76 in the vehicle's waterjet propulsion system, etc. It is also known under its industrial designation, WZ211.
==Development history==
The Chinese obtained a few PT-76 amphibious light tanks in the mid-1950s. In October 1958, the PLA decided to develop an indigenous amphibious tank based on the PT-76 design. The development program was carried out by 201 Institute and the 615 Factory. A prototype known as WZ221 (Type 60) was built and tested in 1959, but the design suffered from a number of problems including engine overheating. The PLA wasn't satisfied with the performance of the vehicle, which led to the development of an improved version. It was jointly developed by Military Engineering Institute (MEI) and the No. 60 Research Institute of Fifth Ministry of Machine Building. The prototype was completed in 1962 and was sent to Norinco Factory 615, the Shaanxi Weiyang Diesel Engine Plant (陕西渭阳柴油机厂), for continued research. After it later passed the extensive trials (mostly dealing with crossing river, lake and sea water obstacles), the amphibious light tank was finally approved for design finalization in April 1963, and was officially designated Type 63.〔("Global Security" )〕〔("Sino Defense" )〕
Because of continuing tension with Taiwan, the PRC felt the need to upgrade its fleet of amphibious tanks as the original Type 63 was rapidly becoming obsolete and incapable of facing modern tanks. To prepare for a possible amphibious assault on Taiwan Island, the PLA requested a new amphibious tank that can be launched from tank landing ships over 10 kilometres offshore and reach the shore at a high swimming speed of 14 kilometres per hour. This improved mobility would reduce the risk to PLA Navy ships from enemy missiles, aircraft, ships, speedboats and mines and increase the survivability of the tank in the amphibious assault stage. The new version was designated Type 63A.
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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