New South Wales Z11 Class 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: • Firebox 18.75 sq ft (1.742 m2 ) • Tubes (219) 1+ 7 ⁄8 sq ft (0.17 m2 ) • Tubes and flues 1,221.0 sq ft (113.43 m2 ) • Total surface 113.0 sq ft (10.50 m2 ) Cylinders 2 inside Cylinder size 17 in × 26 in (432 mm × 660 mm) Valve gear Stephenson
The New South Wales Z11 class (formerly the M40 class) was a class of steam locomotives built by Beyer, Peacock & Company for the New South Wales Government Railways in Australia.[1]
They entered suburban traffic in Sydney in 1891. They were primarily intended for use on the steeply-graded Main Northern line from Strathfield to Hornsby and North Shore line from Milsons Point to Hornsby, hence their hefty weight. They were never noted for spectacular performance.[2]
Between 1906 and 1910, they were rebuilt with Belpaire boilers . They were superseded by the Class 30 and transferred for use on Newcastle suburban services . As part of the 1924 reclassification scheme , the remaining 13 members of the class were reclassified as the Z11 class, numbered 1101 to 1113, 50 having been sold to Australian Iron & Steel and 51 to the South Maitland Railway .[2] Post renumbering, 1104 was to the Nepean Sand & Gravel Company, Richmond and 1111 to Southern Portland Cement, Berrima . The remainder were sold for scrap between 1925 and 1927.[2] [3] None were preserved.[2]