New South Wales 72 class locomotive

New South Wales 72 class locomotive
New South Wales 72 class
Power type Diesel-hydraulic
Builder NSWGR Chullora Workshops
Total produced 1
UIC classification B′B′
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Wheel diameter 37 in (940 mm)
Wheelbase 21 ft 6 in (6.55 m)
Length Over coupler pulling faces: 45 ft 2 1⁄4 in (13.77 m)
Width 9 ft 2 in (2.79 m)
Height 12 ft 7 1⁄4 in (3.84 m)
Locomotive weight 55 tons 0 cwt (123,200 lb or 55.9 t)
Fuel type Diesel fuel
Fuel capacity 500 imp gal (2,300 l; 600 US gal)
Lubricant capacity Engine: 20 imp gal (91 l; 24 US gal),
Transmission: 40 imp gal (180 l; 48 US gal),
Final Drives: 6 imp gal (27 l; 7.2 US gal) each
Coolant capacity 180 imp gal (820 l; 220 US gal)
Sandbox capacity 12 cu ft (0.34 m3)
Prime mover Cummins VT12-825-BI
Engine RPM range 600–2000
Engine type Four-stroke diesel
Aspiration Turbocharged
Cylinders V12
Cylinder size 5.5 × 6 in (140 × 152 mm)
Transmission Clark Model 16420 Reversing
Top speed 45 mph (72 km/h)
Power output Gross: 705 hp (530 kW),
For traction: 640 hp (477 kW)
Tractive effort Continuous: 32,500 lbf (144.57 kN) at 5 mph (8 km/h)
Career New South Wales Government Railways
Number 7201
First run 21 July 1952
Withdrawn August 1976
Scrapped December 1976

The 72 class is a class of diesel locomotive built and operated by the New South Wales Government Railways in Australia.

Contents

Construction

Locomotive 7201 was a diesel-hydraulic locomotive, with B-B wheel arrangement. Built in the N.S.W.G.R. Water Supply Workshops at Chullora, it performed its first light engine trials on 27 August 1965. It was built on the lengthened underframe of a unused D58-class locomotive tender, but using the bogies from a Standard Goods locomotive[1] turret tender. The cab was similar to an X200-class cab and the livery was similar to a 48-class.

The prime-mover was a Cummins VT 12-825-BI; V12 engine, developing 640 h.p. at 2000 r.p.m.. Power was distributed to the bogies through a Clark C 16911 torque converter with Clark 16421 transmission.[2]

7201 at Eveleigh May, 1973

Operations

Following some modifications, it entered service on 8 September 1965 as a shunter at Cooks River Goods Yard. Over the next 6 months, it spent time shunting in yards at Goulburn, Junee, Broadmeadow and Werris Creek. 7201 even had a brief sojourn on the Yass Tramway. During this time, it re-entered the workshops for modifications and repairs. After this initial period, it spent extended periods at the Rozelle yards, however by 1970 it was regularly struggling with the loads. It was then trialled at the ACDEP (Eveleigh) sheds where it shunted the carriages from air-conditioned locomotive-hauled trains which were serviced at this location. It was deemed a success in this duty and was stationed there until 2 March 1976 when it suffered a seized engine.

Demise

Being a one-off and therefore non-standard, the decision was made not to repair the locomotive. 7201 was condemned on 4 August 1976 and scrapped in December that year.[3]

See also

References

  1. ^ One of the 50, 53 or 55 classes
  2. ^ Clark, Peter J.. An Australian Diesel Locomotive Pocketbook. ISBN 0 909650 02 0 page=p.54. 
  3. ^ "Photo Gallery – NSWGR's 7201". Australian Railway Historical Society Bulletin: pp.246–248. June 2007. 
  • New South Wales Rail System Locomotives. Sydney: Archives Section, State Rail Authority of New South Wales. 1984.
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