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NGR Class N 4-6-2T 1906
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NGR Class N 4-6-2T 1906
The Natal Government Railways Class N 4-6-2T of 1906 was a South African steam locomotive from the pre-Union era in the Natal Colony.
In April 1906, the Natal Government Railways placed its first two 4-6-2T narrow-gauge tank steam locomotives in service. In 1912, when these locomotives were assimilated into the South African Railways, they retained their engine numbers, but with an "NG" prefix added. They were sold to the Moçâmedes Railway in Portuguese West Africa in 1915.
By 1906, the Natal Government had realised that light railways were essential as feeders to open up fertile districts which were distant from the existing main- and branch lines, particularly when the intervening stretches of country were difficult from an engineering point of view. The construction of the first narrow-gauge railway line in Natal was therefore approved.
The line was 28+3⁄4 miles (46.3 kilometres) long and stretched from Estcourt to the irrigation settlement of Weenen, an alluvial flat of about 5,000 acres (2,000 hectares) adjoining the Bushman's River. The maximum gradient on this line was 1 in 33 (3⅓%) compensated, with a minimum curvature of 175 feet (53 metres) radius. It was laid with 35 pounds per yard (17 kilograms per metre) rail.
The Class N 4-6-2T tank locomotive was designed by D.A. Hendrie, Locomotive Superintendent of the Natal Government Railways (NGR) from 1902 to 1910. It was the first narrow-gauge locomotive of the NGR.
An order for the construction of two of these locomotives was placed with Hunslet Engine Company in 1906. They were delivered in April 1906, numbered 1 and 2, and were placed in construction service on the new narrow-gauge line to Weenen.
Commonly known as the Hunslet Side Tanks, the locomotives had outside plate frames and used Walschaerts valve gear. The firebox was 3 feet 4+1⁄2 inches (1,029 millimetres) long and, to obtain the required grate area, the width was extended to 4 ft 4+1⁄2 in (1,334 mm) at the foundation ring. To obtain a liberal firebox depth, the frames were opened out for some length at the rear end, with each frame constructed in two pieces which were connected by a cross stretcher in front of the firebox throat plate.
The cylinders were arranged horizontally outside the plate frames, while the flat "D" type slide valves were arranged above the cylinders and actuated by Walschaerts valve gear.
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NGR Class N 4-6-2T 1906
The Natal Government Railways Class N 4-6-2T of 1906 was a South African steam locomotive from the pre-Union era in the Natal Colony.
In April 1906, the Natal Government Railways placed its first two 4-6-2T narrow-gauge tank steam locomotives in service. In 1912, when these locomotives were assimilated into the South African Railways, they retained their engine numbers, but with an "NG" prefix added. They were sold to the Moçâmedes Railway in Portuguese West Africa in 1915.
By 1906, the Natal Government had realised that light railways were essential as feeders to open up fertile districts which were distant from the existing main- and branch lines, particularly when the intervening stretches of country were difficult from an engineering point of view. The construction of the first narrow-gauge railway line in Natal was therefore approved.
The line was 28+3⁄4 miles (46.3 kilometres) long and stretched from Estcourt to the irrigation settlement of Weenen, an alluvial flat of about 5,000 acres (2,000 hectares) adjoining the Bushman's River. The maximum gradient on this line was 1 in 33 (3⅓%) compensated, with a minimum curvature of 175 feet (53 metres) radius. It was laid with 35 pounds per yard (17 kilograms per metre) rail.
The Class N 4-6-2T tank locomotive was designed by D.A. Hendrie, Locomotive Superintendent of the Natal Government Railways (NGR) from 1902 to 1910. It was the first narrow-gauge locomotive of the NGR.
An order for the construction of two of these locomotives was placed with Hunslet Engine Company in 1906. They were delivered in April 1906, numbered 1 and 2, and were placed in construction service on the new narrow-gauge line to Weenen.
Commonly known as the Hunslet Side Tanks, the locomotives had outside plate frames and used Walschaerts valve gear. The firebox was 3 feet 4+1⁄2 inches (1,029 millimetres) long and, to obtain the required grate area, the width was extended to 4 ft 4+1⁄2 in (1,334 mm) at the foundation ring. To obtain a liberal firebox depth, the frames were opened out for some length at the rear end, with each frame constructed in two pieces which were connected by a cross stretcher in front of the firebox throat plate.
The cylinders were arranged horizontally outside the plate frames, while the flat "D" type slide valves were arranged above the cylinders and actuated by Walschaerts valve gear.
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