NZR Rollingstock

A Brief Introduction

The term rollingstock is in many ways self explanatory in that it refers to all the railway 'stock' that rolls on the track. That then includes locomotives, (passenger) carriages, (goods) wagons, (guards) vans, and all special rail equipment like breakdown cranes, service wagons, and modern track maintenance machines etc. In its heyday, NZR had nearly 35,000 items of rollingstock and that all needed to be kept track of. Even in a railway's infancy, the number of rollingstock items increased quickly, Canterbury Provincial Railways started in 1863 with two 1st class and two 2nd class carriages and 18 trucks, ten years later the total had risen to nearly 300 and increasing rapidly. As each new railway was built, it received a standard allocation of locomotives, carriages and wagons, with additional stock acquired once demand had been confirmed. Other than the early railways that started independent from the national Government's public works policy, the types of rollingstock followed a set plan. 1871 say orders placed in England for complete carriages and wagons, usually in kit-set form to minimise shipping volumes, but quite quickly this was changed to importing only the iron-work for wagons with all the timber components sourced locally. Once metal processing machinery was well established in New Zealand, rollingstock could be completely manufactured here using just imported bulk iron and steel, however, more specialised items like wheels and axles continued to be manufactured 'at home'.

While total numbers remained comparatively low, items of rollingstock were quite easy to keep track of even though they were not numbered, as Canterbury Railways operated throughout the broad gauge period. It is likely that most sections of New Zealand's railways will have operated like this in their very early days, as the small number of different wagon types could easily be differentiated by using a simple descriptive term like 'high-sider' or 'horse-box' etc. At some point though, a better means of keeping track of individual items became necessary, and this may have happened at the same time that locomotives got formal classification letters

Grouping of Rollingstock

From the very first days of railways there was a need to apply some form of classification or grouping to the various pieces of rollingstock a railway had in order to keep track of it all. This was as much for allocating the correct items to be on a train as it was for organising repairs or authorising loading. In New Zealand things were no different, even though railway started as small operations in various parts of the country, each section had to know what it had in order to be able to manage it properly. All rollingstock was initially grouped by a descriptive names, but as numbers grew, better systems needed to be developed. Much research has gone into the classification of locomotives, but not so much into the other groups of rollingstock. However, for exactly the same reasons improved systems were developed for locomotive, the same reasons will have applied to wagons and carriages at the time, so it is not unusual to find a parallel system applied to wagons etc.

At the highest level, there were four groups, namely Locomotives, Carriages, Brake Vans and Wagons

Locomotives

Locomotives are the machines that enable a train to move. The first truly reliable locomotive to be constructed was the Rocket, designed by Robert Stephenson and famously proved its abilities at the Rainhill trials in England in 1830. this led to the 'Railway Age' where bigger and faster locomotives were continually appearing, with nearly all early developments originating in England. The success of a railway could largely be measured by the suitability of its locomotive for the task at hand. For a country as young as New Zealand was, the introduction of railways here was an ambitious move, with Canterbury engaging Robert Stephenson the 'world leader in railways' as adviser, and resulting in a successful, if very expensive railway. Southland's initial attempts resulted in failure, principally due to the locomotive design they selected. Once a national rail system was being envisaged, significant thought went into locomotive design requirements and the first mainline locomotive was an immediate success. New Zealand designers went on to leading the world in narrow gauge locomotive design and introduced several new types over the years. Locomotives were initially grouped on system based on the size of the cylinders and the number of wheels. This was primarily a descriptive system that got too complex to extend beyond a handful of locomotive types. Eventually a letter system was adopted allowing for 26 different locomotive types. In practice, two of the letters were not used (I and Z) and some were used more than once (A, D, E, G, J, K, P and Q), and in our post steam era, locomotives are now confined to either a "D" or "E" primary classification letter for Diesel or Electric

Further details and links can be found on the page dedicated to NZR Locomotives

Carriages

Carriages are designed specifically for carrying people and were originally horse drawn carriages adapted to run on rails. It wasn't long before the vision was realised of carrying many people in a single carriage, ans so the railway carriage as we know it today, progressively evolved. Modern carriages have seating for around 50 on long distance trains and somewhat more on commuter trains.

Originally carriages were classified with a descriptive term made up of two sections; the travel class followed by the wheel arrangement, i.e. 1st class, 4 wheel. While there was 1st and 2nd class cars, there were also Composite cars with one half 1st class and the other 2nd class. Originally there were only two wheel arrangements 4 and 6, resulting in six possible classifications. By 1878 however, things started to get more complex with now three wheel arrangements (4, 6 and 8), and a further descriptions of Side Door, or End Door. The 8 wheel type were additionally described as American Bogie, and there was also a patented 6 wheel configuration called Cleminson's Radial Axles (designed to minimise wheel wear). This now resulted in 18 different possibilities.

Over the next few years, certain categories started to drop off the lists and a few others come on. Cleminson's radial axles seem to have been replaced by Grover's under-frames, side-door cars were progressively phased out, and cross-seated cars got a category of their own, and Salon was now a 1st class option. At some stage, probably when letters were also allocated to locomotives in 1877, carriages started carrying a primary classification letter (A - D) followed by a number, and later sub letters were included to denote specific types.

1899 however was the first year that passenger carriages were recorded with classification letters in the Annual Returns to Parliament, the letters A - D had been in used for some time already. The introduction of letters in the annual returns however did not do away with the descriptive classification terms.

Today, B, C and D cars have been eliminated completely leaving only some A cars in use by KiwiRail, the National rail operator. Examples of many of the older carriages have been saved by heritage groups, either restored or preserved for possible later restoration.

Further details can be found on the page dedicated to NZR Carriages

Classification

The classification of locomotives was formalised in 1877 with the introduction of letters to denote a specific type of locomotive. Variations of the type eventually got a second letter, and in one case even a third. The whole alphabet was reserved for locomotives.

In a similar way, other rollingstock also got allocated letters, A - D were for passenger carriages, E was for service wagons, F was for brake vans, and G - Z was for goods wagons.

The annual Parliamentary Returns did not start listing any wagon classification letters till 1886, unlike Locomotives, where classification letters were already recorded in 1881. Carriages and Vans were even later in 1889. It is assumed that carriages, Vans and wagons were allocated classification letters at the same time as locomotives might have been at the same time as locomotives. A careful study of photographic evidence will be required to shed more light on that.

The earliest classification list for Carriages, Vans and Wagons is shown in the following table.

Classification of Rollingstock (1886)
(excluding Locomotives)

Class	Description
A	Bogie carriages over 30 feet long
B	30 foot bogie carriages
C	all 6 wheel carriages
D	all 4 wheel carriages
F	all Brake vans
G	Horse Boxes
H	Cattle Truck
J	Double Floor Sheep Truck
K	Covered Goods Wagon
K2	Refrigerating Covered Goods Wagon
L	High-Side Wagon
M	Low-side Wagon
N	Timber Wagon
O	Iron Hopper Wagon
P	Platform Coal Truck
R	High-sire Bogie wagon
S	Bogie Sheep Wagon

Even today, many of these classification letters still apply although the majority refer to 4-wheel wagons which have now been eliminated from ordinary train services. Some unused letters from this list can also be recognised. The list that follows has all the primary classification letters that have been used throughout NZR's history plus some with secondary letters where the primary letters represent quite different functions from the earlier use e.g. D as a 4 wheel carriage, and Dd as a double-deck car carrier. Most primary categories have (sometimes numerous) secondary letters, and these can be found by following the links attached to the primary letters.

Classification of Rollingstock
Aiming for a Complete List
(excluding Locomotives)

Class	Description
A class Carriages	Bogie carriages
B class Carriages	30 foot bogie carriages
C class Carriages	6 wheel carriages
D class Carriages	4 wheel carriages
Dd class Wagon	Double Deck car transport
E class Wagons	Special-purpose wagons
F class Vans	Brake (Guard's) Vans
G class Wagons	Horse Boxes
H class Wagons	Cattle Wagons
H class Wagons	Heavy Duty container Wagons
I class Wagons	Container Wagons
J class Wagons	Double Floor Sheep Wagons
K class Wagons	Covered Goods Wagons
L class Wagons	High-Side Wagons
M class Wagons	Low-side Wagons
N class Wagons	Timber Wagons
O class Wagons	Iron Hopper Wagons
P class Wagons	Platform Coal Trucks
Q class Wagons	Removable Hopper Wagons
R class Wagons	High-side Bogie wagon
S class Wagons	Bogie Sheep Wagon
S class Carriages	Scenic Carriages
T class Wagons	Bogie Sheep Wagons
U class Wagons	Flat Deck Wagons
V class Wagons	Insulated Wagons
W class Wagons	Wagon
X class Wagons	Wagon
Y class Wagons	Ballast Wagons
Z class Wagons	Bogie Box Wagon