Tasmanian Government Railways Za class

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Tasmanian Government Railways ZA class
Tgr za bell bay.jpg
ZA class locomotive at Bell Bay in February 1978
Type and origin
Power typeDiesel-electric
Builder English Electric Rocklea
Serial numberA.259 to A.262, A.278 to A.279
Build date1973-1976
Total produced6
Specifications
Configuration:
   UIC Co-Co
Gauge 1,067 mm (3 ft 6 in)
Wheel diameter3 ft 1+12 in (0.953 m)
Wheelbase 39 ft 11 in (12.167 m) total, 11 ft 3 in (3.429 m) bogie
Length52 ft 9 in (16.078 m) over headstocks
Height12 ft 7 in (3.835 m)
Axle load 16 long tons (16.3 t; 17.9 short tons)
Loco weight96 long tons (97.5 t; 107.5 short tons)
Fuel typeDiesel
Fuel capacity1,400 imp gal (6,400 L)
Prime mover English Electric 12CSVT Mk III
Engine typefour stroke, four valves per cylinder
Aspirationturbocharged, intercooled
Alternator Toyo WD10314A
Traction motors EE558
Cylinders 12 Vee
Cylinder size 10 in × 12 in (254 mm × 305 mm)
MU working 110V, stepless electro-pneumatic throttle
Loco brake Air, proportional control, dynamic
Train brakes Vacuum, converted to air 1984-1985)
Performance figures
Maximum speed60 miles per hour (97 km/h)
Power output2,550 hp (1,900 kW) gross, 2,350 hp (1,750 kW) net
Tractive effort 54,000 lbf (240.2 kN) at 13.3 mph (20 km/h)
Career
Operators Tasmanian Government Railways
Number in class6
NumbersZa1-Za6
First runJune 1973
Current owner TasRail, Don River Railway & Tasmanian Transport Museum
Disposition1 stored, 2 preserved, 3 scrapped

The Za class are a class of diesel locomotives built by English Electric Rocklea for the Tasmanian Government Railways in 1973.

Contents

History

With the construction of a new line from Launceston to Bell Bay, Tasmanian Government Railways placed an order for four 1752 kW locomotives with English Electric. A further two were delivered in 1976, ZA 6 being the final locomotive built by GEC Australia [1] [2] and the last English Electric locomotive built anywhere. The 1976 locomotives differed from the earlier batch in having a rounded cab roof, similar to the Z class, instead of an angled roof like the 2350 class from which they were derived.

In March 1978 the Za class were included in the transfer of the Tasmanian Government Railways to Australian National. From 1982 all had their vacuum brakes replaced with air brakes. [3]

In June 1998 the five in service were renumbered as the 2114 class, ZA4 having been withdrawn. [4]

In May 2014, 2114 joined 2115 and 2118 in storage after the new TR class entered full service. 2118 (ZA6) was held for preservation with 2115 (ZA2) retained as a parts donor.

On 14 January 2021, the Tasmanian Transport Museum announced that they had managed to secure ZA6, launching a GoFundMe campaign for its restoration the following day.

ZA 1 (2114) was delivered to Don River Railway for preservation on 23 May 2022. Its preservation funded by a sole member.

Status table

Original noLast noOwnersStatus
Za12114 Don River Railway Preserved
Za22115TasRailStored
Za32116TasRailScrapped
Za4Za4 AN Tasrail Scrapped
Za52117TasRailScrapped
Za62118Tasmanian Transport MuseumPreserved

See also

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References

  1. Oberg, Leon (1984). Locomotives of Australia 1850s-1980s. Frenchs Forest: Reed Books. pp. 285–286. ISBN   0-730100-05-7.
  2. Za Class Railpage
  3. Za Class Rail Tasmania
  4. "Tasrail Loco Renumbering" Railway Digest October 1998 page 36