South African type XM1 tender

Specifications
Specifications
Configuration	2-axle bogies
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Length	24 ft 2+7⁄8 in (7,388 mm)
Wheel dia.	30 in (762 mm)
Wheelbase	16 ft 6 in (5,029 mm)
• Bogie	4 ft 6 in (1,372 mm)
Axle load	10 LT 18 cwt (11,070 kg)
• Front bogie	21 LT 14 cwt (22,050 kg)
• Rear bogie	21 LT 16 cwt (22,150 kg)
Weight empty	38,960 lb (17,670 kg)
Weight w/o	43 LT 10 cwt (44,200 kg)
Fuel type	Coal
Fuel cap.	8 LT 5 cwt (8.4 t)
Water cap.	4,000 imp gal (18,200 L)
Stoking	Manual
Couplers	Drawbar & Johnston link-and-pin; Drawbar & AAR knuckle (1930s)

Type and origin
Type and origin
Locomotive	SAR Class MC
Designer	Natal Government Railways; (D.A. Hendrie)
Builder	North British Locomotive Co.
Rebuilt from	Type TM
Rebuilder	South African Railways
Rebuild date	c. 1930

South African type XM1 tender
	SAR dimensional drawing
Locomotive
Type and origin
Locomotive	SAR Class MC
Designer	Natal Government Railways; (D.A. Hendrie)
Builder	North British Locomotive Co.
Rebuilt from	Type TM
Rebuilder	South African Railways
Rebuild date	c. 1930
Configuration
Specifications
Configuration	2-axle bogies
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Length	24 ft 2+7⁄8 in (7,388 mm)
Wheel dia.	30 in (762 mm)
Wheelbase	16 ft 6 in (5,029 mm)
• Bogie	4 ft 6 in (1,372 mm)
Axle load	10 LT 18 cwt (11,070 kg)
• Front bogie	21 LT 14 cwt (22,050 kg)
• Rear bogie	21 LT 16 cwt (22,150 kg)
Weight empty	38,960 lb (17,670 kg)
Weight w/o	43 LT 10 cwt (44,200 kg)
Fuel type	Coal
Fuel cap.	8 LT 5 cwt (8.4 t)
Water cap.	4,000 imp gal (18,200 L)
Stoking	Manual
Couplers	Drawbar & Johnston link-and-pin; Drawbar & AAR knuckle (1930s)
Operators
Career
Operators	South African Railways
Numbers	SAR 1607, 1615

The South African type XM1 tender was a steam locomotive tender.

Type XM1 tenders were Type TM tenders which were reclassified after their intermediate draw and buffing gear were altered to an "X_" tender configuration. They first entered service in 1912, as tenders to the SAR Class MC 2-6-6-0 Denver type Mallet locomotive.^[1]^[2]^[3]

Origin

Type TM tenders were built between 1910 and 1912 by the North British Locomotive Company (NBL). The two Type XM1 tenders originally entered service on the South African Railways (SAR) in 1912, as Type TM tenders to Class MC 2-6-6-0 Denver type Mallet locomotives.^[1]^[2]^[3]^[4]^[5]

Rebuilding

At some stage before 1941, the intermediate draw and buffing gear of two of the tenders, numbers 1607 and 1615, were altered to an "X_" tender configuration. These two tenders were reclassified to Type XM1.^[3]

Characteristics

The tender had a coal capacity of 8 long tons 5 hundredweight (8.4 tonnes) and a water capacity of 4,000 imperial gallons (18,200 litres), with a maximum axle load of 10 long tons 18 hundredweight (11,070 kilograms).^[2]^[3]

Classification letters

Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the SAR. The first letter of the tender type indicates the classes of engines to which it could be coupled. The "X_" tenders could be used with the following locomotive classes:^[3]

The second letter indicates the tender's water capacity. The "_M" tenders had a capacity of 4,000 imperial gallons (18,200 litres; 4,800 US gallons).^[3]

A number, when added after the letter code, indicates differences between similar tender types such as function, wheelbase or coal bunker capacity.^[3]

References

^ ^a ^b Holland, D.F. (1971). Steam Locomotives of the South African Railways. Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England: David & Charles. pp. 102–104. ISBN 978-0-7153-5382-0.
^ ^a ^b ^c South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 3'6" Gauge/Spoorwydte. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. p. 43.
^ ^a ^b ^c ^d ^e ^f ^g South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 2'0" & 3'6" Gauge/Spoorwydte, Steam Locomotives/Stoomlokomotiewe. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. pp. 6a-7a, 44.
^ Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 20–22. ISBN 978-0-7153-5427-8.
^ Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 36, 85. ISBN 0869772112.