1909 articulated steam locomotive
NGR Mallet 2-6-6-0 1909 NGR Mallet no. 336, SAR Class MA no. 1601,
c. 1909 Type and origin Power type Steam Designer American Locomotive Company Builder American Locomotive Company Serial number 46044 Model NGR Mallet Build date 1909 Total produced 1
Specifications Configuration: • Whyte 2-6-6-0 (Denver) • UIC (1'C)Cnv4 Driver 3rd & 6th coupled axles Gauge 3 ft 6 in (1,067 mm ) Cape gauge Leading dia. 28+ 1 ⁄2 in (724 mm)Coupled dia. 45+ 1 ⁄2 in (1,156 mm)Tender wheels 30 in (762 mm) Wheelbase 2+ 3 ⁄4 in (18,358 mm) • Engine 33 ft 2 in (10,109 mm) • Coupled 8 ft 4 in (2,540 mm) per unit • Tender 17 ft 10 in (5,436 mm) • Tender bogie 5 ft 10 in (1,778 mm) Length: • Over couplers 2+ 3 ⁄8 in (20,787 mm)Height 5+ 1 ⁄8 in (3,788 mm)Frame type Bar Axle load 13 LT 18 cwt (14,120 kg) • Leading 6 LT 17 cwt (6,960 kg) • 1st coupled 12 LT 14 cwt (12,900 kg) • 2nd coupled 13 LT 18 cwt (14,120 kg) • 3rd coupled 13 LT 6 cwt 2 qtr (13,540 kg) • 4th coupled 13 LT 2 cwt (13,310 kg) • 5th coupled 12 LT 18 cwt (13,110 kg) • 6th coupled 13 LT 16 cwt (14,020 kg) • Tender bogie Bogie 1: 20 LT 7 cwt (20,680 kg)Bogie 2: 22 LT 10 cwt (22,860 kg)Adhesive weight 79 LT 14 cwt 2 qtr (81,000 kg) Loco weight 86 LT 11 cwt 2 qtr (87,960 kg) Tender weight 42 LT 17 cwt (43,540 kg) Total weight 129 LT 8 cwt 2 qtr (131,500 kg) Tender type 2-axle bogies Fuel type Coal Fuel capacity 8 LT 5 cwt (8.4 t) Water cap. 4,000 imp gal (18,000 L) Firebox: • Type Round-top & combustion chamber • Grate area 40 sq ft (3.7 m2 ) Boiler: • Pitch 7 ft 4 in (2,235 mm) • Diameter 5 ft 4 in (1,626 mm) • Tube plates 10+ 1 ⁄2 in (5,448 mm) • Small tubes 230: 2+ 1 ⁄4 in (57 mm)Boiler pressure 200 psi (1,379 kPa) Safety valve Ramsbottom Heating surface: • Firebox 125 sq ft (11.6 m2 ) • Tubes 2,422 sq ft (225.0 m2 ) • Total surface 2,574 sq ft (239.1 m2 ) Cylinders Four High-pressure cylinder 17+ 1 ⁄2 in (444 mm) boreLow-pressure cylinder 28 in (711 mm) bore Valve gear Walschaerts Valve type HP: Piston LP: Richardson balanced slide Valve travel HP: 5 in (127 mm)LP: 5+ 1 ⁄2 in (140 mm)Valve lap HP: 1 in (25 mm)LP: 7 ⁄8 Valve lead HP & LP: 3 ⁄16 Couplers Johnston link-and-pin
The South African Railways Class MA 2-6-6-0 of 1909 was a steam locomotive from the pre-Union era in the Natal Colony .
In 1909, the Natal Government Railways placed a single 2-6-6-0 compound steam locomotive in service. In 1912, when it was assimilated into the South African Railways, it was renumbered and designated Class MA.[ 1] [ 2] [ 3] [ 4]
^ Holland, D.F. (1971). Steam Locomotives of the South African Railways . Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England: David & Charles . pp. 103–105. ISBN 978-0-7153-5382-0 ^ Espitalier, T.J.; Day, W.A.J. (1944). The Locomotive in South Africa - A Brief History of Railway Development. Chapter III - Natal Government Railways (Continued). South African Railways and Harbours Magazine, August 1944. pp. 592-593.
^ Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, pp. 9, 12, 15, 46 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
^ Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 84–85. ISBN 0869772112 