| NZR NA class | |
|---|---|
| Power type | Steam |
| Builder | Baldwin Locomotive Works |
| Serial number | 13913, 15054 |
| Build date | 1894, 1896 |
| Total produced | 2 |
| Configuration | 2-6-2 |
| UIC classification | 1′C1′ n |
| Gauge | 3 ft 6 in (1,067 mm) |
| Driver diameter | 49 in (1.24 m) |
| Length | 50 ft 10 in (15.49 m) |
| Weight on drivers | 25 tons 4 cwt (56,400 lb or 25.6 t) |
| Locomotive weight | 35 tons 4 cwt (78,800 lb or 35.7 t) |
| Tender weight | 19 tons 2 cwt (42,800 lb or 19.4 t) |
| Locomotive & tender combined weight |
54.5 tons |
| Fuel type | Coal |
| Fuel capacity | 3 tons 0 cwt (6,700 lb or 3.0 t) |
| Water capacity | 1,500 imp gal (6,800 l; 1,800 US gal) |
| Boiler pressure | 180 lbf/in² (1.24 MPa) |
| Firegrate area | 16.7 sq ft (1.55 m2) |
| Heating surface: Total |
957 sq ft (88.9 m2) |
| Superheater type | None |
| Cylinders | Four (Vauclain compound) |
| High-pressure cylinder size |
10 × 20 in (254 × 508 mm) |
| Low-pressure cylinder size |
17 × 20 in (432 × 508 mm) |
| Tractive effort | 9,700 lbf (43.15 kN) |
| Career | Wellington and Manawatu Railway, New Zealand Government Railways |
| Number | WMR 14, 15 NZR 459, 460 |
| Locale | Frankton, Wairarapa, Wellington - Longburn section |
| Withdrawn | 1929 |
| Disposition | Withdrawn |
The NA class was a class of two steam locomotives that operated on the privately owned Wellington and Manawatu Railway (WMR) and then the publicly owned national rail network in New Zealand. Ordered by the WMR to operate on its line up the west coast of the North Island north of Wellington, the first was built in 1894 by the Baldwin Locomotive Works and entered service that year as WMR No. 14. In 1896, a second locomotive that was slightly more powerful was ordered from Baldwin, and it entered service in October 1897. The engines were similar to the two members of the N class ordered in 1891, except they were heavier and more powerful. They were Vauclain compound locomotives.
In 1908, the WMR was incorporated into the national network and the government's Railways Department reclassified the engines as the sole members of the NA class: No. 14 became NA 459 and No. 15 became NA 460. They operated for roughly another two decades; NA 459 spent its final days working in Frankton near Hamilton and was withdrawn from service in March 1929, while NA 460's last depot was Cross Creek at the Wairarapa end of the Rimutaka Incline and it was withdrawn in July 1929.
