PPR 26 Tonner 0-6-0ST

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PPR 26 Tonner 0-6-0ST
NZASM 26 Tonner 0-6-0ST
IMR 0-6-0ST 1896
CSAR 0-6-0ST 1896
South African 0-6-0ST 1896
PPR 26 Tonner 0-6-0ST Pietersburg b.jpg
Pretoria-Pietersburg Railway's Pietersburg, c. 1940
Type and origin
Power type Steam
Designer Hawthorn, Leslie and Company
Builder Hawthorn, Leslie and Company
Serial number 2346, 2369, 2370
Build date 1896-1897
Total produced 3
Specifications
Configuration 0-6-0ST (Six-coupled)
Driver 2nd coupled axle
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Coupled dia. 42 in (1,067 mm)
Wheelbase 10 ft 5 12 in (3,188 mm)
Wheel spacing
(Asymmetrical)
1-2: 5 ft 5 in (1,651 mm)
2-3: 5 ft 12 in (1,537 mm)
Length:
 • Over couplers 25 ft 12 in (7,633 mm)
Height 11 ft 1 34 in (3,397 mm)
Frame type Plate
Axle load 9 LT 6 cwt (9,449 kg)
 • 1st coupled 8 LT 7 cwt (8,484 kg)
 • 2nd coupled 9 LT 6 cwt (9,449 kg)
 • 3rd coupled 8 LT 7 cwt (8,484 kg)
Adhesive weight 26 LT (26,420 kg)
Loco weight 26 LT (26,420 kg)
Fuel type Coal
Fuel capacity 1 LT 10 cwt (1.5 t)
Water cap 620 imp gal (2,820 l)
Firebox type Round-top
 • Firegrate area 8.3 sq ft (0.77 m2)
Boiler:
 • Pitch 5 ft 10 in (1,778 mm)
 • Diameter 3 ft 4 in (1,016 mm)
 • Tube plates 8 ft 10 516 in (2,700 mm)
 • Small tubes 130: 1 34 in (44 mm)
Boiler pressure 140 psi (965 kPa)
Heating surface 576.6 sq ft (53.568 m2)
 • Tubes 527.9 sq ft (49.04 m2)
 • Firebox 48.7 sq ft (4.52 m2)
Cylinders Two
Cylinder size 14 in (356 mm) bore
20 in (508 mm) stroke
Valve gear Stephenson
Valve type Slide
Couplers Bell link-and-pin
Performance figures
Tractive effort 9,800 lbf (44 kN) @ 75%
Career
Operators Pretoria-Pietersburg Railway
NZASM
Imperial Military Railways
Central South African Railways
South African Railways
Class PPR 26 Tonner
Number in class 3
Official name Pretoria, Pietersburg & Nylstroom
Delivered 1896-1897
First run 1896
For lack of a classification, these locomotives are referred to as 26 Tonners, since the NZASM, who took possession of the PPR, classified its own locomotives according to their weight

The Pretoria-Pietersburg Railway 26 Tonner 0-6-0ST of 1896 was a South African steam locomotive from the pre-Union era in the Transvaal.

In 1896 and 1897, the Pretoria-Pietersburg Railway in the Zuid-Afrikaansche Republiek placed three 26 Tonner saddle-tank locomotives with a 0-6-0ST wheel arrangement in service. These locomotives were not classified and, since all three were named, they were referred to by name.[1][2]

The Pretoria-Pietersburg Railway[edit]

The Pretoria-Pietersburg Railway Company (PPR), incorporated in London on 13 May 1896 with a capital of £500,000, constructed a railway which operated northward from Pretoria West via Warmbad and Nylstroom to Pietersburg. The 176 miles (283 kilometres) long line was constructed under a concession, granted by the government of the Zuid-Afrikaansche Republiek (ZAR) to Hendrik Jacobus Schoeman on 30 October 1895. Construction commenced in 1897 and the first 80 miles (130 kilometres) to Nylstroom was opened to traffic on 1 July 1898. The remaining 96 miles (154 kilometres) to Pietersburg was completed on 31 May 1899.[1][2]

On 1 May 1899, the southern terminus of the PPR at Pretoria West was connected to Pretoria station of the NZASM by a link line, constructed at the cost of the PPR. Mr. G. Mayo was appointed as the General Manager of the PPR, and the official opening of the whole line took place on 21 May 1899.[2]

Manufacturer[edit]

The first locomotives of the PPR were three 26 Tonner 0-6-0ST saddle-tank engines, which were built by Hawthorn, Leslie and Company, one in 1896 and the other two in 1897. They were employed as construction locomotives while the line was being built and were not classified or numbered, but named Pretoria, Pietersburg and Nylstroom.[1][2]

Characteristics[edit]

The engine's cylinders were inclined and arranged outside the 78 inch (22 millimetres) thick plate frames. The steam chests were arranged between the frames, with the slide valves being actuated by Stephenson valve gear, through rocker shafts.[2]

Service[edit]

NZASM[edit]

PPR 26 Tonner 0-6-0ST.jpg

As a result of the outbreak of the Anglo-Boer War in 1899 and, since the PPR was owned by a British registered company, the railway and its rolling stock were seized by the ZAR government in October 1899, only five months after the line was completed to Pietersburg. The line was then worked briefly by the Neder­landsche-Zuid-Afrikaansche Spoor­weg-Maatschappij (NZASM), until that railway was itself seized by the invading British military forces towards the end of the same year.[1][3]

Imperial Military Railways[edit]

All railway operations in the two Boer Republics, the ZAR and the Orange Free State, were taken over by the Imperial Military Railways (IMR) in 1899 and operated by the invading military for the duration of the war.[3]

Central South African Railways[edit]

At least two of the three locomotives survived the war. At the end of the war, the IMR was transformed into the Central South African Railways (CSAR).[1]

South African Railways[edit]

When the Union of South Africa was established on 31 May 1910, the three Colonial government railways (CGR, Natal Government Railways and Central South African Railways) were united under a single administration to control and administer the railways, ports and harbours of the Union. Although the South African Railways and Harbours came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways required careful planning and was only implemented with effect from 1 January 1912.[3][4]

Two of the locomotives, the engines Nylstroom and Pietersburg, survived in railway service to be taken onto the South African Railways (SAR) roster in 1912. Since they were considered obsolete, they were excluded from the SAR classification and renumbering list. In spite of being obsolete, both of them survived in SAR service into the 1940s, employed as shunting locomotives at the SAR's Pretoria workshops and to test the steam heating system of passenger trains.[2][4][5]

Upon their eventual retirement, the engines Nylstroom and Pietersburg were plinthed outside the Nylstroom and Pietersburg stations respectively.[1]

Works numbers[edit]

The 26 Tonner names, works numbers and years built are as follows:[1]

  • The engine Pretoria - 2346 of 1896.
  • The engine Pietersburg - 2369 of 1897.
  • The engine Nylstroom - 2370 of 1897.

Illustration[edit]

All three 26 Tonner locomotives are illustrated in the following photographs.

References[edit]

  1. ^ a b c d e f g Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 118–119. ISBN 978-0-7153-5382-0. 
  2. ^ a b c d e f Espitalier, T.J.; Day, W.A.J. (1944). The Locomotive in South Africa - A Brief History of Railway Development. Chapter V - Other Transvaal and O.F.S. Railways. South African Railways and Harbours Magazine, December 1944. pp. 925-928.
  3. ^ a b c The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, pp. 20, 22-23, 25.
  4. ^ a b Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, p. 2 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
  5. ^ Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 23–24. ISBN 0869772112.