NZR Aa class
Encyclopedia
The AA class consisted of ten steam locomotive
s built to operate on New Zealand
's national rail network
. Built to a similar design to the A class
of 1906, they had a wheel arrangement of 4-6-2
and were suited to hauling freight services. Ordered and built in 1914, all ten entered service in New Zealand in June 1915. They worked for four decades, with the first withdrawals occurring in December 1955, when six were taken out of service. The remaining four continued to operate until February 1957. None are preserved.
Steam locomotive
A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...
s built to operate on New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
's national rail network
Rail transport in New Zealand
Rail transport in New Zealand consists of a network of gauge railway lines in both the North and South Islands. Rail services are focused primarily on freight, particularly bulk freight, with limited passenger services on some lines...
. Built to a similar design to the A class
NZR A class (1906)
The A class were steam locomotives built in 1906 with a 4-6-2 wheel arrangement for New Zealand's national railway network, and described by some as the most handsome engines to run on New Zealand rails. The class should not be confused with the older and more obscure A class of 1873. They were...
of 1906, they had a wheel arrangement of 4-6-2
4-6-2
4-6-2, in the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles , six powered and coupled driving wheels on three axles, and two trailing wheels on one axle .These locomotives are also known as Pacifics...
and were suited to hauling freight services. Ordered and built in 1914, all ten entered service in New Zealand in June 1915. They worked for four decades, with the first withdrawals occurring in December 1955, when six were taken out of service. The remaining four continued to operate until February 1957. None are preserved.
