NZR NA class

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Withdrawn	1929
Disposition	Withdrawn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 N^A 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 N^A class: No. 14 became N^A 459 and No. 15 became N^A 460. They operated for roughly another two decades; N^A 459 spent its final days working in Frankton near Hamilton and was withdrawn from service in March 1929, while N^A 460's last depot was Cross Creek at the Wairarapa end of the Rimutaka Incline and it was withdrawn in July 1929.

See also

• Locomotives of New Zealand

External links

• New Zealand steam locomotives — N^A class
• Baldwin Steam Trust's page on WMR/NZR locomotives built by Baldwin - includes the N^A class
• Drawing of an N^A class locomotive by Derek Brown