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Type 052D destroyer
The Type 052D destroyer (NATO code name Luyang III class, or ''Kunming'' class after the lead ship) is a class of guided missile destroyers being deployed by the Chinese People's Liberation Army Navy Surface Force. Currently it is being built at two different Chinese ship yards.
After the Type 052C destroyer (NATO code name ''Luyang II'' class, or ''Lanzhou'' class after the lead ship), two new hulls were spotted under construction at Changxingdao-Jiangnan Shipyard (JNCX) in August 2012. According to the picture, they were armed with a new 130mm main gun and new AESA radar system. Altogether six vessels of this class are now fitting out or under construction, with at least a further two on order or planned, three vessels on sea trial and two vessels active.
==Design==
The layout of the Type 052D is similar to the earlier Type 052C, but the superstructure of the Type 052D slopes inward at a greater angle, providing reduced radar cross-section. The helicopter hangar on the Type 052D is moved to the center, as opposed to being on the left like on the Type 052C. A pair of enclosed boat/raft launching systems similar to that of the Type 054A frigate is added, with one on each side of the helicopter hangar. The Type 517HA VHF radar mast is moved toward the stern of the ship. There are several mounting sites for a new single barrel 30 mm stealthy gun mount that is fully automated. The addition of this small caliber weapon is presumably for the need to counter non-conventional threats such as potential terrorist attacks and anti-piracy operations, but as of the end of 2012, no 30 mm gun mounts have been observed to be installed on the hull yet.
Due to the greater angle of superstructure slope, more space was made available for the active phased array radar (APAR), which first appeared in June 2012 onboard PLAN weaponry trial ship ''Bi Sheng''.〔(【引用サイトリンク】title=中国试验舰测试新型相控阵雷达，New APAR Tested on Chinese Experimental Ship )〕 It is believed that this new APAR is a development of Type 348 Radar mounted on the Type 052C. One of the main differences is that the size of the new array is larger, so presumably there are more transceivers on each array. Another obvious difference is that the curvature resulted in the need for air circulation on earlier APAR on Type 052C is gone, so it is believed that the new APAR on Type 052D must have adopted a pure liquid cooling system instead of the mixed air and liquid cooling system on earlier APAR on board Type 052C.
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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