South African Class NG6 4-4-0

Beira Railway Lawley 4-4-0
South African Class NG6 4-4-0

Falcon F2, Beira Railway no. BR6, SAR no. NG106, restored as no. BR7, Sandstone Estates, 9 April 2006
Type and origin
♠ Falcon F2 - ♥ Falcon F4
Power type Steam
Designer Falcon Engine and Car Works
Builder Falcon Engine and Car Works
Glasgow Railway Engineering
Model Falcon F2 & F4
Build date 1895-1898
Total produced 42 (6 F2 & 36 F4)
Specifications
Configuration 4-4-0 (American)
Driver 1st coupled axle
Gauge 2 ft (610 mm) narrow
Leading dia. 24 in (610 mm)
Coupled dia. ♠ 32 in (813 mm)
♥ 36 in (914 mm)
Tender wheels 24 in (610 mm)
Wheelbase ♠ 25 ft 2 1⁄4 in (7,677 mm)
♥ 26 ft (7,925 mm)
 • Engine ♠ 13 ft 9 1⁄4 in (4,197 mm)
♥ 14 ft (4,267 mm)
 • Leading 3 ft 10 in (1,168 mm)
 • Coupled 5 ft 5 in (1,651 mm)
 • Tender 6 ft (1,829 mm) (3-axle)
Length:
 ​
 • Over couplers 31 ft 5 1⁄2 in (9,588 mm)
Width 6 ft 4 in (1,930 mm)
Height 9 ft 6 3⁄4 in (2,915 mm)
Axle load 4 LT 10 cwt (4,572 kg)
 • Leading 5 LT (5,080 kg)
 • Coupled 4 LT 10 cwt (4,572 kg)
Adhesive weight 9 LT (9,144 kg)
Loco weight 14 LT (14,220 kg)
Tender weight ♠ 6 LT 10 cwt (6,604 kg)
♥ 7 LT 10 cwt (7,620 kg)
Total weight ♠ 20 LT 10 cwt (20,830 kg)
♥ 21 LT 10 cwt (21,850 kg)
Tender type 3-axle
Fuel type Coal
Fuel capacity 2 LT (2.0 t)
Water cap 780 imp gal (3,550 l)
Firebox type Round-top
 • Firegrate area ♠ 4.5 sq ft (0.42 m2)
♥ 5.25 sq ft (0.488 m2)
Boiler:
 ​
 • Pitch 4 ft 8 1⁄2 in (1,435 mm)
 • Diameter 2 ft 8 1⁄4 in (819 mm)
 • Tube plates 7 ft 1 11⁄16 in (2,176 mm)
 • Small tubes ♠ 75: 1 3⁄4 in (44 mm)
Boiler pressure 140 psi (965 kPa)
Safety valve ♠ Salter - ♥ Ramsbottom
Heating surface ♠ 262 sq ft (24.3 m2)
♥ 276 sq ft (25.6 m2)
 • Tubes ♠ 233 sq ft (21.6 m2)
♥ 246 sq ft (22.9 m2)
 • Firebox ♠ 29 sq ft (2.7 m2)
♥ 30 sq ft (2.8 m2)
Cylinders Two
Cylinder size ♠ 8 in (203 mm) bore
♥ 9 in (229 mm) bore
♠♥ 15 in (381 mm) stroke
Valve gear Stephenson
Loco brake Handbrake
Train brakes Vacuum
Couplers Bell-and-hook
Performance figures
Tractive effort ♠ 3,000 lbf (13 kN) @ 75%
♥ 3,987 lbf (17.74 kN) @ 75%
Career
Operators Beira Eailway
Ayrshire Railway
South African Railways
Class SAR Class NG6
Number in class BR 42, SAR 13
Numbers BR 4-45
SAR NG96-NG108
Nicknames Lawley
Delivered 1895-1898
First run 1895
Withdrawn 1935

The South African Railways Class NG6 4-4-0 of 1895 was an ex-Mozambican narrow gauge steam locomotive from the Beira Railway era.

Between 1895 and 1898, Pauling and Company placed 42 Falcon-built types F2 and F4 tender steam locomotives with a 4-4-0 American type wheel arrangement in service on the two feet narrow gauge line which was being constructed for the Beira Railway in Mozambique. In 1915, thirteen of these locomotives were acquired by the South African Railways to replace locomotives which had been commandeered by the Union Defence Forces for use in German South West Africa during the First World War.[1][2]

At the end of the war, these locomotives were staged, but in 1921 they were placed back in service by the South African Railways. When a system of grouping narrow gauge locomotives into classes was eventually introduced somewhere between 1928 and 1930, they were designated Class NG6.[2][3]

The Beira Railway

Construction of the first 2 ft (610 mm) narrow gauge railway in Southern Africa began in 1892. This was the 370-kilometre long (230-mile) line of the narrow gauge Beira Railway which eventually stretched from Beira in Mozambique to Umtali across the Rhodesian border. The border was reached in October 1897 and the full line to Umtali was opened to traffic on 4 February 1898. The work was undertaken by Pauling and Company and was subcontracted to Alfred Lawley.[2][4]

Manufacturers and characteristics

Falcon works plate

Between 1895 and 1898, the Beira Railway placed 42 Falcon types F2 and F4 tender steam locomotives with a 4-4-0 American type wheel arrangement in service, supplied in six batches by Falcon Engine and Car Works Limited in England and the Glasgow Railway Engineering Company in Scotland. In service, these locomotives were soon nicknamed Lawleys, after the Beira Railway construction subcontractor.[2][3]

Falcon F2

Falcon F2

The first of the Falcon F2 loco­motives differed from later models of its class by having a cab which was similar to the Beira Railway's earlier three 0-6-0 locomotives, with two rectangular louvred cab windows on each side. Its boiler dome was fitted with a Salter safety valve. The locomotive was delivered by Falcon in 1895 and was numbered BR4.[4]

A further five F2 locomotives were ordered from Falcon and were also delivered in 1895, numbered in the range from BR5 to BR9. They differed in appearance from the first F2 locomotive by having larger single cab windows.[4]

Falcon F4

Falcon F4

The next six locomotives which were ordered from Falcon in 1896, were of an altered design. The Falcon F4 was larger and heavier than the F2, with the running boards stepped down below the cab, a larger tube heating surface in the boiler, single slidebars, straight lipped funnels, Ramsbottom safety valves over the fireboxes, and a tractive effort which was increased from the 3,000 pounds-force (13 kilonewtons) at 75% of boiler pressure of the F2 to 3,987 pounds-force (18 kilonewtons). They were numbered in the range from BR10 to BR15 and could pull 180 long tons (183 tonnes) up the ruling gradients, compared to the 160 long tons (163 tonnes) which the F2 could manage.[4]

At the end of 1896, another four of these engines were delivered from Falcon, numbered in the range from BR16 to BR19. They were similar to the previous batches, but had larger three-axle tenders with an increased water capacity.[4]

The last sixteen Falcon-built locomotives were all delivered in 1897, numbered in the range from BR20 to BR35. All these Falcon-built F2 and F4 locomotives bore their engine numbers on the sandboxes on their running boards, in the form of individual brass letters and numbers.[4]

Glasgow F4

The construction of the last batch of ten F4 locomotives was subcontracted by Falcon to the Glasgow Railway Engineering Company in Scotland. They were built and delivered in 1898, numbered in the range from BR36 to BR45. The Glasgow locomotives had wasp-waisted safety valves and their engine numbers, also mounted on the sandboxes, were cast oval brass plates.[4]

The manufacturing company in Glasgow was formed by Dugald Drummond in 1891, as Dugald Drummond and Sons. In 1895, when Dugald left to take up the post as locomotive engineer of the London and South Western Railway, the name of the business was changed to the Glasgow Railway Engineering Company, with his sons continuing to manage the works. While the earlier locomotives were known as the Falcon F2 and Falcon F4, this last batch of Glasgow-built locomotives were often referred to as the Drummond F4, in spite of its builder's name change.[4][5]

Fowler tenders

In addition to the three-axle tenders which were delivered with all the F2 and F4 locomotives, two larger bogie tenders were ordered from John Fowler and Company of Leeds. One of these was attached to no. BR5 after its three-axle tender was wrecked in an accident. Both these bogie tenders later turned up in South Africa, attached to numbers BR6 and BR8.[4]

Service

Beira Railway

In service, it turned out that the Lawleys were not adequate to the task. Since rapid growth in traffic soon overwhelmed the narrow gauge line, it was widened to Cape gauge by 1900. As a result, the whole Lawley locomotive fleet, together with the rest of the Beira Railway's narrow gauge locomotives, were staged at Bamboo Creek (Villa Machado) near Beira, with the exception of those locomotives which were required for the Ayrshire Railway which was still under construction at the time.[1][2][4]

Ayrshire Railway

The Ayrshire Railway used much of the redundant Beira Railway equipment, including six of the F4 locomotives, one of them Falcon-built and the other five Glasgow-built. They remained in service there until this line was also converted to Cape gauge in 1914 and became the Sinoia branch of the Beira, Mashonaland and Rhodesia Railway.[4]

Union Defence Force

During the First World War, when South African forces conducted a campaign to drive German forces from Deutsch-Südwest-Afrika (DSWA), narrow gauge locomotives were urgently required on the Otavi Railway in that territory to replace those which were destroyed by the retreating German forces. Several South African Railways (SAR) locomotives from the various narrow gauge lines were therefore commandeered by the Union Defence Forces (UDF). To replace these, thirteen of the Lawleys in staging at Bamboo Creek were purchased by the South African Department of Defence and brought to South Africa in 1915. They were renumbered in the range from NG96 to NG108 and, after being repaired, nine of them were placed in service while the other four were cannibalised for spare parts.[1][2][3][4]

As the DSWA campaign drew to a close and many of the ex-German narrow gauge locomotives were repaired, the SAR locomotives on active service gradually returned to their home lines in South Africa. As a result, the Lawleys were staged once again after less than two years of service in South Africa.[2]

South African Railways

In 1921, Lawley numbers NG101 and NG102 were re-commissioned and placed in SAR service on the branchline from Pienaarsrivier to Pankop, off the mainline between Pretoria and Pietersburg. The Lawleys were the smallest tender steam locomotives to ever see service on the SAR. They performed quite well on this line, since the branch was a light railway with slow speeds and small rolling stock.[1][2][3]

During 1924, construction commenced on the narrow gauge branchline between Upington and Kakamas in the Northern Cape Province and, during 1925, on the branch from Fort Beaufort to Seymour in the Eastern Cape. The remaining Lawleys were then also recovered from storage and placed in service once again. They remained in service when these branchlines were opened to traffic, even though it was usually only in a standby capacity.[2][3]

Also in 1924, Lawley no. NG98 joined the Dutton road-rail tractors on the narrow gauge line from Naboomspruit to Singlewood. By 1927, it was joined by no. NG103, but by this time the Singlewood branch was being regauged to Cape gauge and, by 11 June 1928, it was extended to Zebediela.[6][7][8]

The system of grouping narrow gauge locomotives into classes was adopted by the SAR somewhere between 1928 and 1930 and, at that point, the Lawley locomotives were designated Class NG6. The steady increase in loads on the narrow gauge branches eventually once again proved to be more than the Lawleys were capable of and they were eventually withdrawn. The last one, no. NG103, was retired in 1935.[2][9]

Industrial

Several Lawleys were sold into private use with some surviving in service until 1957, often being sold or resold between users. Known users were, amongst others, Premier Portland Cement in Bulawayo, the Rhodesian Native Timber Concessions at Gwaai, the Cam and Motor Mine at Gatooma, the Selukwe Peak Light Railway of the Selukwe Chrome Mine, the Lupane Forest Estates, the Igusi Saw Mills and the Arcturus Mine east of Salisbury, all these in Rhodesia. In South Africa, some went to the Zebediela citrus plantations in the northern Transvaal.[2][4]

Works numbers

Since frames, boilers and tenders were exchanged between locomotives during the process of building nine serviceable locomotives from the thirteen which were purchased from Bamboo Creek in 1915, the original identities of these locomotives were not always accurately recorded. The Lawley locomotive models, builders and works numbers are listed in the table, which includes the engine numbers of those SAR locomotives of which the Beira Railway engine numbers are known.[4]

Preservation

Two locomotives have been restored to running condition at the Sandstone Estates near Ficksburg in the Free State. One is Falcon F2 no. BR6, later SAR no. NG106, which was restored by Sandstone as no. BR7 in the original green Beira Railway livery, while the other is Falcon F4 no. BR25, later SAR no. NG97, which was restored in the black SAR livery.

Illustration

The main picture shows the restored Falcon F2, Beira Railway no. BR6, SAR no. NG106, restored as no. BR7, at Sandstone Estates on 9 April 2006. Those following also illustrate Lawleys in SAR service.

References

Wikimedia Commons has media related to South African Class NG6 4-4-0.
  1. 1 2 3 4 Railway Modelling Scene, South Africa, May/June 1985, article written by Neill Mardell
  2. 1 2 3 4 5 6 7 8 9 10 11 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 103–104. ISBN 0869772112.
  3. 1 2 3 4 5 Espitalier, T.J.; Day, W.A.J. (1945). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued). South African Railways and Harbours Magazine, October 1945. p. 781.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Baxter, Antony. The Two Foot Gauge Enigma (1st ed.). Plateway Press. pp. 37-45 & Appendix V. ISBN 1-871980-34-8.
  5. ↑ Pattison, R.G. (2005). Thundering Smoke, (1st ed.). Sable Publishing House. ISBN 0-9549488-1-5
  6. ↑ Cash, R.G. (2015). The Stronach-Dutton Roadrail System of Traction. The Narrow Gauge, Autumn 2015. The Narrow Gauge Railway Society. pp. 30-31.
  7. ↑ Statement Showing, in Chronological Order, the Date of Opening and the Mileage of Each Section of Railway, Statement No. 19, p. 188, ref. no. 200954-13
  8. ↑ Statement Showing, in Chronological Order, the Date of Opening and the Mileage of Each Section of Railway, Statement No. 19, p. 189, ref. no. 200954-13
  9. ↑ South African Railways and Harbours Narrow Gauge Locomotive Diagram Book, 2'0" Gauge, S.A.R. Mechanical Dept. Drawing Office, Pretoria, 28 November 1932
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