NZASM 13 Tonner 0-4-0T

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NZASM 13 Tonner 0-4-0T
NZASM 13 Tonner 0-4-0T.jpg
13 Tonner, c. 1889
Type and origin
Power typeSteam
Designer Maschinenfabrik Esslingen
BuilderMaschinenfabrik Esslingen
Serial number2311
Build date1889
Total produced1
Specifications
Configuration:
​
 •  Whyte 0-4-0 T
 •  UIC Bn2t
Driver2nd coupled axle
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Coupled dia.31 1⁄2 in (800 mm)
Wheelbase 5 ft 3 in (1,600 mm)
Length:
​
 • Over couplers16 ft 10 7⁄8 in (5,153 mm)
Height11 ft 2 in (3,404 mm)
Frame type Plate
Adhesive weight 13 LT (13,210 kg)
Loco weight13 LT (13,210 kg)
Fuel typeCoal
Fuel capacity5 long hundredweight (0.3 t)
Water cap300 imp gal (1,400 l)
Firebox typeRound-top
 • Firegrate area7.1 sq ft (0.66 m2)
Boiler:
​
 • Pitch5 ft 4 1⁄2 in (1,638 mm)
 • Diameter3 ft 1 5⁄16 in (948 mm)
 • Tube plates6 ft 8 11⁄16 in (2,049 mm)
 • Small tubes88:1 3⁄4 in (44 mm)
Boiler pressure160 psi (1,103 kPa)
Heating surface305 sq ft (28.3 m2)
 • Tubes271 sq ft (25.2 m2)
 • Firebox34 sq ft (3.2 m2)
Cylinders Two
Cylinder size 11 in (279 mm) bore
15 3⁄4 in (400 mm) stroke
Valve gear Allan
Valve type Slide
Couplers Johnston link-and-pin
Performance figures
Tractive effort 5,150 lbf (22.9 kN) @ 75%
Career
OperatorsNZASM
Class NZASM 13 Tonner
Number in class1
Official name13 Tonner
Delivered1889
First run1889

The NZASM 13 Tonner 0-4-0T of 1889 was a South African steam locomotive from the pre-Union era in the Transvaal.

Contents

In 1889, the Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij acquired a single locomotive, very similar to its 14 Tonner locomotives and built by the same manufacturer, but with a smaller water and coal capacity. Since the railway classified its locomotives according to their weight, this well-and-side-tank locomotive was known as the 13 Tonner. [1]

The Randtram line

As a result of the rapid development of the goldfields on the Witwatersrand in the 1880s and the demand for coal by the growing industry, the Volksraad of the Zuid-Afrikaansche Republiek (ZAR), also known as the Transvaal Republic, granted a concession to the Nederlandsche-Zuid-Afrikaansche Spoorweg­maatschappij (Netherlands-South African Railway Company, NZASM) on 20 July 1888 to construct a 16-mile long (26-kilometre) railway from Johannesburg to Boksburg. The railway, which was opened on 17 March 1890, became known as the Randtram line. [1] [2] [3]

Manufacturer

In 1889, six small 0-4-0 T locomotives were delivered to the NZASM by the German engineering firm and locomotive builder Maschinen­fabrik Esslingen, owned by Emil Kessler. Five of these were the NZASM 14 Tonners. The sixth, the sole 13 Tonner, was also a well-and-side-tank locomotive with a 0-4-0T wheel arrangement and was similar to, but lighter than the 14 Tonner. [1]

Characteristics

The engine's cylinders were arranged outside the plate frames. The "D" type slide valves, mounted above the cylinders, were arranged at an incline and were actuated by Allan straight link motion. In this type of valve gear, the valve rod and the expansion link are respectively connected to opposing arms on the reversing shaft, so that partial rotation of the shaft moves the link and the die block in opposite directions. [1]

Apart from the side-tanks, the locomotive also had a well-tank between the frames under the boiler barrel. The dome was on the front section of the boiler and the regulator valve was arranged in the smokebox. [1]

Comparison

Compared to the 14 Tonner, the 13 Tonner differed in at least three respects, judging from photographs. The 13 Tonner had a much narrower coal bunker and a shorter chimney. The side-tanks were also much smaller, reaching only as far forward as aft of the boiler-mounted sandbox dome. [1] [3]

On the 14 Tonner, the side-tanks on each side were in two parts and reached as far forward as aft of the steam dome. In addition, the 14 Tonner had two small panels in the side of the rear tank on its right side. The 13 Tonner had no such panels. [1] [3]

Related Research Articles

The following lists events that happened during 1894 in South Africa.

The following lists events that happened during 1891 in South Africa.

The following lists events that happened during 1893 in South Africa.

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CSAR Class C 2-8-4T

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References

  1. 1 2 3 4 5 6 7 Espitalier, T.J.; Day, W.A.J. (1944). The Locomotive in South Africa - A Brief History of Railway Development. Chapter IV - The N.Z.A.S.M.. South African Railways and Harbours Magazine, October 1944. pp. 761-764.
  2. ↑ Holland, D.F. (1971). Steam Locomotives of the South African Railways. 1: 1859–1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 109–110. ISBN   978-0-7153-5382-0.
  3. 1 2 3 The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 19.
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