NZR RM class (Standard)

NZR RM class Standard
RM 31 (Tokomaru) at the Pahiatua Railcar Society
In service	1938–1972
Manufacturer	New Zealand Government Railways
Built at	Hutt Workshops
Constructed	1938
Number built	6
Number in service	None
Number preserved	4
Fleet numbers	30–35
Capacity	48–52 passengers
Operator(s)	New Zealand Government Railways
Specifications
Car length	67 ft 11 in (20.70 m)
Width	8 ft 9 in (2.67 m)
Maximum speed	62 mph (100 km/h)
Weight	30 tonnes (30 long tons; 33 short tons)
Prime mover(s)	Meadows 6-cylinder, 2 off
Power output	85 kW (114 hp) (×2)
Transmission	Mechanical
UIC classification	A1-1A
Track gauge	3 ft 6 in (1,067 mm)

The NZR RM class Standard railcars were a class of railcar operated by the New Zealand Railways Department in the North Island of New Zealand. Officially classified as RM like all other railcar classes in New Zealand, they acquired the designation of 'Standard' to differentiate them from others. They were introduced in 1938.

Background

Since the 1912 experiments with a MacEwan-Pratt petrol railcar, the New Zealand Railways Department had been seeking an effective and successful railcar design. Many routes simply did not have the demand to economically justify locomotive-hauled passenger express trains, so railcars were seen as a viable alternative. New Zealand's difficult terrain posed problems to railcar design, but in 1936, the Wairarapa railcars were introduced and proved to be a great success on the Wairarapa Line from Wellington over the Rimutaka Incline to the Wairarapa, and following from this, the Standard railcars were designed to provide regional services in on regular lines in the North Island.

Six total were built in the NZR Hutt Workshops in 1938 and 1939, each with a semi-streamlined design featuring slanting ends. Driving controls were located at each end of the railcar so that they did not have to be turned at termini. They wore out three sets of engines; the original Leyland engines were replaced with Meadows engines. The original cream body colour with a green stripe was inconspicuous, and was replaced with red plus a stripe and a grey roof (Wright).

All six of the Standard railcars were named after Māori canoes.

Operation

File:NZR RM class Standard 02.JPG

RM 31 (Tokomaru) going for a run through the Pahiatua station yard.

The Standard railcars were first used to operate a fast return service from Wellington to New Plymouth, and soon a Hawkes Bay service between Wairoa and Napier was added, along with a Sundays-only return service from Napier to Wellington. In 1943, the Wairoa-Napier service was extended to serve Gisborne.

In 1955, the 88 seater railcars were introduced, and 88 seaters and Standards initially shared duties on the New Plymouth and Hawkes Bay services, but soon the 88 seaters took over all of the Hawkes Bay services and the Standard railcars were left to run the New Plymouth route. After the opening of the Rimutaka Tunnel in November 1955, both the 88 seater and Standard railcars soon took over from the Wairarapa railcars and operated a service from Wellington to Palmerston North via the Wairarapa.

The Standard railcars never operated in the South Island, as the Vulcan railcars were built to operate rural services on that island.

Record runs

In September 1938 RM 30 covered the 321 km between Napier and Wellington in 4 hours and 36 minutes running time. In 1967 RM 30 took a group of railway enthusiasts from Auckland to Wellington in 9 hours and 26 minutes (running time 8 hours and 42 minutes).

Withdrawal and preservation

File:NZR RM class Standard 03.JPG

RM 31 (Tokomaru) at Pahiatua.

The Standard railcars were withdrawn in 1972, and two-thirds of the class have been preserved.

Two cars, RM 30 Aotea and RM 34 Tainui were purchased by the New Zealand Railway & Locomotive Society (NZR&LS) Wellington Branch in 1972 for their heritage project in the Hutt Valley, then located at Gracefield on the industrial branch line of the same name. RM 32 Pangatoru was purchased by the NZR&LS Waikato Branch and displayed at their Te Awamutu Railway Museum until 1991, when it moved to Te Rapa locomotive depot for a proposed overhaul that never eventuated.

The late John Murphy purchased the other three cars - RM 31 Tokomaru, RM 33 Takitimu, and RM 35 Tikitere - in December 1972 for preservation, along with many spare parts and instruction manuals. Although he wanted to keep all three cars, he was later forced to scrap RM 33 and RM 35 as he was unable to look after them. Also, while RM 33 was still potentially operable, RM 35 had been involved in an accident during its last months of service, and its frame was bent in such a way that would have prevented it from running again; even if it was feasible to repair the damage, it would have been beyond John's means to repair it or pay for it to be repaired.

Today, RM 30 and RM 34 reside on the Silver Stream Railway in Wellington. RM 30 is operable, while RM 34 is currently undergoing overhaul to working order to allow it to run on the SSR during open days. RM 32 is now located at the Glenbrook Vintage Railway south of Auckland; the railcar moved there in 2001 after the proposed overhaul fell through and the Te Rapa loco depot was demolished, requiring it to find a new home.

RM 31 was for a time held at Masterton, but was later placed on loan to the Pahiatua Railcar Society at Pahiatua. When John died, the car was bequeathed to the PRS along with the manuals and spare parts, some of which came from RM 33 and RM 35, that John had accumulated. The car attended the 2008 North Island Main Trunk cetenary celebrations, but at the time was not mainline-permitted. It was finally brought up to mainline standards in late 2011, and Ditchlights mounted in headstocks. Has undergone main line trials and crew training. First revenue run (as a heritage rail vehicle) on 12 February 2012.

As part of the mainline qualifications, RM 31 has been fitted with an events recorder, train radio, and ditch lights at either end. These are recessed into the railcar's front fairings so as not to detract from the original character of the railcar.

Class register

Key:	In service	On lease	Out of service	Preserved	Overhaul/Repair	Scrapped

Number	Name	Introduced	Withdrawn	Notes
30	Aotea	July 1938	December 1972	Preserved, Silver Stream Railway.
31	Tokomaru	August 1938	December 1972	Preserved, Pahiatua Railcar Society. Mainline certified.
32	Pangatoru	October 1938	December 1972	Preserved, New Zealand Railway and Locomotive Society. On loan to the Glenbrook Vintage Railway.
33	Tākitimu	February 1939	December 1972	Scrapped.
34	Tainui	March 1939	December 1972	Preserved, Silver Stream Railway.
35	Tikitere	July 1939	December 1972	Scrapped.

References

• Rail: The Great New Zealand Adventure by Roy Sinclair (1987, Grantham House Wellington) ISBN 1-86934-013-2 (record runs, page 85)
• Rails Across New Zealand by Matthew Wright (2003, Whitcoulls NZ) ISBN 1-877327-14-X (page 76)

External links

• Pahiatua Railcar Society - RM 31
• NZ Diesel and Electric Traction - Standard railcar
• Photo of Standard railcar at New Plymouth c1939
• NZR Publicity photo of Tokomaru c1939