New South Wales Z11 class locomotive

New South Wales Z11 Class
M.40 (Z11) Class Tank Locomotive
Type and origin Power type Steam Builder Beyer, Peacock and Company Serial number 3324–3338 Build date 1891 Total produced 15 Rebuilder NSWGR
Specifications Configuration: ​  • Whyte 4-4-2T Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 25 in (1,549 mm) Driver dia. 5 ft 8 in (1,727 mm) Trailing dia. 4 ft 0 in (1,219 mm) Wheelbase 28 ft 1 in (8.56 m) Length 38 ft 1+1⁄2 in (11.62 m) Axle load 14 long tons 8 cwt (32,300 lb or 14.6 t) Adhesive weight 28 long tons 14 cwt (64,300 lb or 29.2 t) Loco weight 56 long tons 9 cwt 1 qr (126,480 lb or 57.37 t) Fuel type Coal Fuel capacity 2+1⁄4 long tons (2.5 short tons; 2.3 t) Water cap. 1,200 imp gal (5,500 l; 1,400 US gal) Boiler 4 ft 5 in (1,346 mm) Boiler pressure 160 psi (1,103 kPa) Heating surface 113.0 sq ft (10.50 m2)  • Tubes (219) 1+7⁄8 sq ft (0.17 m2)  • Tubes and flues 1,221.0 sq ft (113.43 m2)  • Firebox 18.75 sq ft (1.742 m2) Cylinders 2 inside Cylinder size 17 in × 26 in (432 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 15,800 lbf (70 kN)
Career Operators New South Wales Government Railways Class M40 - Z11 Number in class 15 Numbers 1101-1115

The Z11 class (formerly the M40 class) was a class of steam locomotives built for the New South Wales Government Railways in Australia.^[1][2][3][4]

Built by Beyer, Peacock and Company of Manchester, they entered suburban traffic in Sydney in 1891.

They were primarily intended for use on the steeply-graded Strathfield-Hornsby and Milson's Point-Hornsby sections, hence their hefty weight which served to hinder them later in their careers. Because of this, they were never noted for spectacular performance.

Between 1906 and 1910, they were rebuilt with Belpaire boilers. They were soon superseded by the S636 class 4-6-4Ts and were promptly used on Newcastle suburban services for a period. In 1924, all were renumbered as part of the Z11 Class.

No. 50 was sold to Australian Iron & Steel Ltd., No. 51 to the South Maitland Railway, No. 1104 to the Nepean Sand & Gravel Company and No. 1111 to the Southern Portland Cement Company of Berrima. The remainder were sold for scrap between 1925 and 1927.

None are preserved.

Gallery[]

• 

  No.51 locomotive

See also[]

• NSWGR steam locomotive classification

References[]

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