Vauclain Compound - New Zealand

New Zealand

Seven Vauclain compounds were supplied to the Wellington and Manawatu Railway Company (WMR) which operated the Wellington - Manawatu Line in New Zealand. WMR No. 13, built in 1894, was the first compound in New Zealand and the first narrow-gauge compound in the world. In 1908 No. 13 was classified as the NZR Oa class when the WMR was nationalised. Later Vauclain compounds purchased by the WMR were the NZR Na class (No. 14 of 1894 & No. 15 of 1896); NZR Nc class (No. 5 (1901) & No. 18 of 1904); NZR Oc class (No. 16 of 1896); and NZR Bc class (No. 17 of 1901).

Although standard-gauge compounds usually had the larger low-pressure cylinder on each side below the high-pressure cylinder, this was reversed on narrow-gauge locomotives with the low-pressure cylinder above the high-pressure cylinder to provide greater clearance from platforms.

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