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The BA class was a class of steam locomotive built by the New Zealand Railways Department (NZR) for use on New Zealand's national rail network. The first BA entered service in November 1911, with the last of the 11 class members introduced on 14 May 1913. ==Construction and later enhancements== In design and appearance the BA class was very similar to the B class of 1899-1903, but superheated and with a smaller firebox. They were designed primarily for use on freight trains in the South Island, and were capable of hauling a load of goods at speeds up to . In March 1928, BA 552 was modified to have a wider firebox, and later that year the same work was done on BA 498. It was almost two decades before the alterations were performed on any other members of the class: BA 553 was done in May 1948, BA 148 the next month, and fifth and last was BA 499 in November 1949. The other BA locomotives were left with unmodified fireboxes. The upgraded engines were capable of producing more power: their boiler pressure was raised to and they could generate . On straight, flat track, they could haul , and on the arduous Mihiwaka Bank north of Dunedin they were capable of hauling , more than the five locomotives that were not upgraded. Like many classes of specialised freight engines on NZR, eight of the ten BA locomotives were modified to perform shunting duties. This included an all-weather cab fixture on the tender to provide shelter for crews, and second sand domes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NZR BA class」の詳細全文を読む スポンサード リンク
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